Eppendorf OM_GLP_ResearchPlus_3123_900_013-02_042019_en_online Eppendorf Research® plus Operating manual
nualsearch® plus
E
Register your instrument!
www.eppendorf.com/myeppendorf
N)
manual
Eppendorf Research® plus
Operating manual
Copyright© 2019 Eppendorf AG, Germany. All rights reserved, including graphics and
images. No part of this publication may be reproduced without the prior permission of the
copyright owner.
Eppendorf
®
and the Eppendorf Brand Design are registered trademarks of Eppendorf AG,
Germany.
epT.I.P.S.® and Research® are registered trademarks of Eppendorf AG, Germany.
®
Registered trademarks and protected trademarks are not marked in all cases with
or ™
in this manual.
U.S. Patents are listed on www.eppendorf.com/ip
U.S. Design Patents are listed on www.eppendorf.com/ip
3123 900.013-02/042019
Eppendorf Research
Table of contents
®
plus
English (EN)
Table of contents
1 Operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Using this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Danger symbols and danger levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2.1 Danger symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2.2 Danger levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2 Warnings for intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Delivery package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.1 Single-channel pipettes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1.2 Multi-channel pipettes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.2 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2.1 Pipette models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Product overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.3.1 Multi-channel lower part with fixed cone spacing . . . . . . . . . . . . 13
3.4 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.5 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3
4 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Setting the volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1.1 Setting a small volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1.2 Setting a large volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1.3 Reading the set volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2 Attaching the pipette tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3 Optimum immersion depths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4 Forward pipetting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4.1 Aspirating liquid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4.2 Dispensing liquid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.4.3 Ejecting the pipette tip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.5 Reverse pipetting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.5.1 Aspirating liquid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.2 Dispensing liquid. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.5.3 Ejecting the pipette tip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.6 Storing the pipette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table o f con tents
Eppendorf Research
4
®
plus
English (EN)
5 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Error search. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1.1 Control button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1.2 Dispensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1.3 Pipette tip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1.4 Tip cone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.1 Disassembling the single-channel pipette ≤ 1000 μL . . . . . . . . . . . . . . . . . . 21
6.1.1 Removing the lower part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.1.2 Disassembling the lower part . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.2 Disassembling the single-channel pipette ≥ 2.5 mL . . . . . . . . . . . . . . . . . . . 22
6.2.1 Removing the lower part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.2.2 Disassembling the lower part . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.3 Assembling the single-channel pipette ≤ 1000 μL . . . . . . . . . . . . . . . . . . . . 24
6.4 Assembling the single-channel pipette ≥ 2 mL. . . . . . . . . . . . . . . . . . . . . . . 24
6.4.1 Assembling the lower part. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.4.2 Checking the function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.5 Replacing the protection filter ≥ 2 mL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.6 Disassembling the multi-channel lower part – 4.5 mm cone spacing . . . . . 25
6.6.1 Opening the multi-channel lower part . . . . . . . . . . . . . . . . . . . . . 25
6.6.2 Removing pistons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.6.3 Removing the cylinder block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.7 Assembling the multi-channel lower part – 4.5 mm cone spacing. . . . . . . . 27
6.7.1 Inserting the cylinder block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.7.2 Insert the pistons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.7.3 Closing the multi-channel lower part . . . . . . . . . . . . . . . . . . . . . . 28
6.8 Replacing O-rings – multi-channel lower part . . . . . . . . . . . . . . . . . . . . . . . 28
6.8.1 Removing the O-ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.8.2 Mounting a new O-ring – 100 μL and 300 μL . . . . . . . . . . . . . . . . 29
6.8.3 Mounting a new O-ring – 1200 μL . . . . . . . . . . . . . . . . . . . . . . . . 29
6.9 Adjusting the pipette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.10 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.10.1 Cleaning and disinfecting the pipette . . . . . . . . . . . . . . . . . . . . . . 30
6.10.2 Cleaning and disinfecting the lower part . . . . . . . . . . . . . . . . . . . 30
6.10.3 Sterilizing the pipette with UV light . . . . . . . . . . . . . . . . . . . . . . . 30
6.11 Autoclaving the pipette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.11.1 Autoclaving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.12 Decontamination before shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.13 Lubricating the piston or cylinder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.13.1 Lubricating the piston . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.13.2 Lubricating the cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Eppendorf Research
Table of contents
®
plus
English (EN)
7 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.1 Adjustable sub-steps – single-channel pipettes . . . . . . . . . . . . . . . . . . . . . . 33
7.2 Adjustable sub-steps – multi-channel pipettes . . . . . . . . . . . . . . . . . . . . . . . 33
7.3 Ambient conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8 Measurement deviations according to Eppendorf AG . . . . . . . . . . . . . . . . . . . . . 34
8.1 Single-channel pipettes with fixed volume setting . . . . . . . . . . . . . . . . . . . . 34
8.2 Single-channel pipettes with variable volume setting . . . . . . . . . . . . . . . . . 35
8.3 Multi-channel pipettes with fixed cone spacing . . . . . . . . . . . . . . . . . . . . . . 36
8.4 Test conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
8.5 Special tips for single-channel pipettes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9 Ordering information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
9.1 Single-channel pipettes with fixed volume setting . . . . . . . . . . . . . . . . . . . . 38
9.2 Single-channel pipettes with variable volume setting . . . . . . . . . . . . . . . . . 38
9.3 Multi-channel pipettes with fixed cone spacing . . . . . . . . . . . . . . . . . . . . . . 39
9.3.1 9 mm cone spacing for 96-well plates. . . . . . . . . . . . . . . . . . . . . . 39
9.3.2 4.5 mm cone spacing for 384-well plates . . . . . . . . . . . . . . . . . . . 39
5
Table o f con tents
Eppendorf Research
6
English (EN)
®
plus
Operating instructions
Eppendorf Research
®
plus
English (EN)
1 Operating instructions
1.1 Using this manual
Read this operating manual completely before using the device for the first time.
Observe the instructions for use of the accessories where applicable.
This operating manual is part of the product. Please keep it in a place that is easily
accessible.
Enclose this operating manual when transferring the device to third parties.
The current version of the operating manual for all available languages can be found
on our webpage www.eppendorf.com/manuals
1.2 Danger symbols and danger levels
1.2.1 Danger symbols
The safety instructions in this manual have the following danger symbols and danger
levels:
Biohazard Explosive substances
Toxic substances Material damage
Hazard point
.
7
1.2.2 Danger levels
DANGER Will lead to severe injuries or death.
WAR NIN G May lead to severe injuries or death.
CAUTION May lead to light to moderate injuries.
NOTICE May lead to material damage.
1.3 Symbols used
Depiction Meaning
1.
2.
Actions in the specified order
Actions without a specified order
• List
Text Display or software texts
Additional information
Safety
Eppendorf Research
8
English (EN)
®
plus
2Safety
2.1 Intended use
The Eppendorf Research plus pipette is designed and constructed for low-contamination
transfer of liquids. It is intended exclusively for use in research. This pipette is intended
exclusively for indoor use and for operation by qualified staff.
2.2 Warnings for intended use
WARNING! Damage to health due to infectious liquids and pathogenic
germs.
When handling infectious liquids and pathogenic germs, observe the national
regulations, the biosafety level of your laboratory, the material safety data
sheets, and the manufacturer's application notes.
Wear your personal protective equipment.
For comprehensive regulations about handling germs or biological material
of risk group II or higher, please refer to the "Laboratory Biosafety Manual"
(source: World Health Organization, Laboratory Biosafety Manual, the current
edition).
WARNING! Damage to health due to toxic, radioactive or aggressive
chemicals.
Wear your personal protective equipment.
Observe the national regulations for handling these substances.
Observe the material safety data sheets and manufacturer's application notes.
CAUTION! Danger to people due to grossly negligent use.
Never point the opening of the device towards yourself or others.
Only initiate liquid dispensing if it is safe to do so.
For all dispensing tasks, make sure that you are not endangering yourself or
anyone else.
CAUTION! Poor safety due to incorrect accessories and spare parts.
The use of accessories and spare parts other than those recommended by
Eppendorf may impair the safety, functioning and precision of the device.
Eppendorf cannot be held liable or accept any liability for damage resulting from
the use of accessories and spare parts other than those recommended, or from
the improper use of such equipment.
Only use accessories and original spare parts recommended by Eppendorf.
Safety
Eppendorf Research
NOTICE! Damage to device due to missing pipette tips.
®
plus
English (EN)
Use the pipette with fitted pipette tips only.
NOTICE! Carry-over, contamination and incorrect dispensing results due to
the incorrect use of pipette tips.
The pipette tips are for single use only. Prolonged use can have a negative
impact on dispensing tasks.
Only use the pipette tips once.
NOTICE! Incorrect dispensing volume with special liquids and due to
temperature differences.
Solutions with physical data very different to that of water or temperature
differences between the pipette, pipette tip and liquid may result in incorrect
dispensing volumes.
Avoid temperature differences between the pipette, pipette tip and liquid.
NOTICE! Damage to device due to penetration of liquid.
Only immerse the pipette tip in the liquid.
Do not put the pipette down when the pipette tip is filled.
The pipette itself may not come into contact with the liquid.
9
Product description
Eppendorf Research
10
®
plus
English (EN)
3 Product description
3.1 Delivery package
Quantity Description
1 Research plus
1 Adjustment tool (Allen key with a blue handle)
5 Red adjustment seal
1 Pin (remove the safety plug)
1 Operating manual
1Certificate
3.1.1 Single-channel pipettes
Quantity Description
1 Locking ring (≤ 1000 μL)
10 Protection filter (2.5 mL – 10 mL)
1 Pipette wrench (2.5 mL – 10 mL)
3.1.2 Multi-channel pipettes
Quantity Description
1 Multi-channel tool 100/300 (100 μL and 300 μL)
1 Multi-channel tool 1200 (1200 μL)
1 Unlocking tool (1200 μL)
2 Locking clip (8-channel lower part with 10 μL, 100 μL and 300 μL)
3 Locking clip (12-channel lower part with 10 μL, 100 μL and 300 μL)
Product description
Eppendorf Research
®
plus
English (EN)
3.2 Features
The Eppendorf Research plus pipette is a piston-stroke pipette for aspirating and
dispensing liquids. The pipette operates according to the air cushion principle. A suitable
pipette tip must be fitted prior to use. The dispensing and volume setting ring are
controlled with the dispensing button. The pipette tips are ejected with the separate
ejector. Depending on the model, volumes between 0.1 μL and 10 mL can be dispensed.
3.2.1 Pipette models
Different variants are available:
• Single-channel pipettes with fixed volume setting
• Single-channel pipettes with variable volume setting
• Multi-channel pipettes with 8 or 12 channels with fixed cone spacing and variable
volume setting
• Multi-channel pipettes with 16 or 24 channels with fixed cone spacing (4.5 mm) and
variable volume setting
11
Product description
12
11
10
9
8
6
4
5
3
2
1
7
13
14
16
15
17
Eppendorf Research
12
English (EN)
3.3 Product overview
Abb. 3-1:Single-channel pipette and multi-channel pipette
®
plus
Fig. 3-1: Single-channel pipette and multi-channel pipette
Product description
2 3 4 5
1
9 mm
4.5 mm
Eppendorf Research
English (EN)
®
plus
13
1 Dispensing button
2Volume setting ring
3Ejector
4Volume display
5 Single-channel upper part with
nominal volume
6 Adjustment opening
7 Adjustment display
8 Labeling area
9 Single-channel lower part with
nominal volume
10 Ejector sleeve
11 Tip cone
12 Pipette tip
13 Lever
14 Multi-channel lower part with nominal
volume
15 Multi-channel upper part with nominal
volume
16 Housing lid
17 Latch
Opening the lower part
3.3.1 Multi-channel lower part with fixed cone spacing
Abb. 3-2:Multi-channel lower parts with fixed cone spacing
Fig. 3-2: Multi-channel lower parts with fixed cone spacing
1 Mechanical coupling
2 8-channel lower part
9 mm cone spacing for 96-well plates
3 12-channel lower part
4 16-channel lower part
4.5 mm cone spacing for 384-well plates
5 24-channel lower part
4.5 mm cone spacing for 384-well plates
9 mm cone spacing for 96-well plates
Product description
Eppendorf Research
14
English (EN)
®
plus
3.4 Materials
NOTICE! Aggressive substances may damage components, consumables and
accessories.
Check the chemical resistance before using organic solvents or aggressive
chemicals.
Only use liquids whose vapors do not attack the materials used.
The components of the pipette which can be accessed by the user are made of the
following materials:
Assembly Material
External surfaces of the upper part • Improved polypropylene (PP)
• Polycarbonate (PC)
• Polyetherimide (PEI)
•Foil
Viewing window • Polycarbonate (PC)
Exterior and interior of lower parts • Improved polypropylene (PP)
• Polyvinylidene fluoride (PVDF)
• Polyetherimide (PEI)
• Polyphenylene sulfide (PPS)
• Polyetheretherketone (PEEK)
• Polytetrafluoroethylene (PTFE)
• Ethylene propylene diene rubber (EPDM)
• Silicone
• Steel (stainless steel and spring steel)
You can find information on the resistance to chemicals on our webpage
www.eppendorf.com/manuals
.
3.5 Warranty
In case of warranty claims, contact your local Eppendorf contractual partner.
No warranty is given in the following cases:
• In the case of misuse.
• If unauthorized persons open the upper part.
The following assemblies are excluded from the warranty:
• Wear parts
4Operation
4.1 Setting the volume
4.1.1 Setting a small volume
Set the volume from a high to a low value.
4.1.2 Setting a large volume
Set the volume from a high to a low value.
Operation
Eppendorf Research
®
plus
English (EN)
1. Turn the volume setting ring clockwise.
The set volume is shown on the volume
display.
1. Turn the volume setting ring
counterclockwise.
The set volume is shown on the volume
display.
15
4.1.3 Reading the set volume
The volume is shown on the volume display. The decimal place is under the hyphen.
1. Read the volume from top to bottom.
Set volume: 80 μL.
Operation
Eppendorf Research
16
®
plus
English (EN)
4.2 Attaching the pipette tips
The pipette tip can be attached by hand or mounted directly from a tip holder (tray) with
the pipette.
The pipette tips are single-use items.
The control button and the trays are color-coded. The color marks the pipette
size and the volume of the pipette tip (epT.I.P.S.).
1. Insert the tip cone into the pipette tip
using light force.
4.3 Optimum immersion depths
Volume Immersion depth
0.1 μL – 1 μL 1 mm
1 μL – 100 μL 2 – 3 mm
100 μL – 1000 μL 2 – 4 mm
1 mL – 10 mL 3 – 5 mm
Eppendorf Research
Operation
English (EN)
4.4 Forward pipetting
4.4.1 Aspirating liquid
Prerequisites
• The pipette tip has been attached.
To ensure maximum precision and accuracy, we recommend initially wetting
each new tip by aspirating and dispensing the liquid one to three times.
1. Press down the dispensing button to the first stop.
2. Immerse the pipette tip vertically in the liquid.
3. Maintain the immersion depth and let the dispensing button slide back slowly.
Liquid is aspirated into the pipette tip.
4. Wait until the liquid has been aspirated.
5. Remove the pipette tip from the liquid.
If necessary, wipe the pipette tip against the tube inner wall.
4.4.2 Dispensing liquid
1. Place the pipette tip on the tube inner wall at a steep angle.
2. Slowly press down the dispensing button to the first stop.
The liquid is dispensed.
3. Wait until the flow of liquid stops.
4. Press down the dispensing button to the second stop.
The pipette tip is completely emptied.
5. Hold down the dispensing button and wipe the pipette tip on the tube inner wall.
®
plus
17
4.4.3 Ejecting the pipette tip
Press the ejector.
The pipette tip is ejected.
4.5 Reverse pipetting
An additional volume (blow out) is aspirated when performing reverse pipetting. This can
improve dispensing results for viscous or foaming liquids. Volume limits may occur when
using filter tips.
Operation
Eppendorf Research
18
®
plus
English (EN)
4.5.1 Aspirating liquid
1. Press down the dispensing button to the second stop.
2. Immerse the pipette tip vertically in the liquid.
3. Maintain the immersion depth and let the dispensing button slide back slowly.
Liquid is aspirated into the pipette tip.
4. Wait until the liquid has been aspirated.
5. Remove the pipette tip from the liquid.
If necessary, wipe the pipette tip against the tube inner wall.
4.5.2 Dispensing liquid
1. Place the pipette tip on the tube inner wall at a steep angle.
2. Slowly press down the dispensing button to the first stop.
The liquid is dispensed.
3. Wait until the flow of liquid stops.
4. Hold down the dispensing button and wipe the pipette tip on the tube inner wall.
Residual liquid remains in the pipette tip.
During dispensing, the additional volume (blow out) does not belong to the dispensing
volume.
4.5.3 Ejecting the pipette tip
1. Press down the dispensing button to the second stop.
The residual liquid is dispensed.
The residual liquid can be discarded.
2. Press the ejector.
The pipette tip is ejected.
4.6 Storing the pipette
The pipette can be stored in a pipette carousel, a wall mount or in horizontal position.
Eppendorf Research
5 Troubleshooting
5.1 Error search
Problem Cause Solution
The adjustment seal has
been removed; the
adjustment display has
been changed.
The pipette has been adjusted
for a different liquid.
Adjust the pipette for the
liquid used.
5.1.1 Control button
Problem Cause Solution
The control button jams
and does not move
smoothly.
• The piston is contaminated.
• The seal is contaminated.
• The seal is defective.
• The pipette is blocked.
Clean the lower part.
Replace the protection filter
(2.5 mL – 10 mL).
5.1.2 Dispensing
Problem Cause Solution
Liquid is dripping from
the tip and/or the
dispensed volume is
incorrect.
Pipette tip is loose.
Firmly attach the pipette tip
Deactivate the
spring-loaded action.
Use epT.I.P.S. pipette tips.
For 2.5 mL, 5 mL and
10 mL ep Dualfilter T.I.P.S.
pipette tips, work without a
protection filter in the
pipette.
Liquid with high vapor
pressure and/or different
density.
Pipetting was too quick.
The tip is withdrawn from the
liquid too quickly.
Liquid aspirated with blow out
and dispensed with blow out.
The piston is contaminated.
Wet the tip several times
and adjust the pipette for
the liquid used.
Move the control button
slowly.
Withdraw the tip slowly and
with a time delay (approx. 3
seconds) from the liquid.
Repeat dispensing
correctly.
Clean and grease the
piston.
Troubleshooting
®
plus
English (EN)
19
Troubles hooting
Eppendorf Research
20
English (EN)
Problem Cause Solution
®
plus
The tip cone is damaged.
The O-rings of the tip cones
are damaged.
5.1.3 Pipette tip
Problem Cause Solution
Pipette tip is loose. The pipette tip is not
compatible.
Higher attachment forces are
required.
Liquid is dripping from
the tip and/or the
dispensed volume is
incorrect.
The piston is damaged.
5.1.4 Tip cone
Replace the lower part or
channel.
Replace the O-rings
(100 μL, 300 μL and 1200
μL multi-channel).
Use epT.I.P.S. pipette tips.
Use a suitable size.
Firmly attach the pipette
tip.
Deactivate the
spring-loaded action.
Replace the piston.
Problem Cause Solution
No spring-loaded action
of the tip cone.
The spring-loaded action is
blocked.
Remove the locking ring
(single-channel).
Remove the locking clip
(multi-channel).
Use of a 2.5 mL-, 5 mL-,10 mL
or 1200 μL pipette.
To prevent dispensing errors, regularly check the precision and accuracy of the pipette.
The gravimetric test and the conversion of the measured values for the volume
are described in the document “Standard operating procedure for manual
dispensing systems". The document is available on the webpage
www.eppendorf.com/manuals
.
The tip cone of these sizes
does not have spring-loading
action.
Eppendorf Research
1 2 4 53
6 Maintenance
6.1 Disassembling the single-channel pipette ≤ 1000 μL
Abb. 6-1:Single-channel lower part ≤ 1000 μL
Fig. 6-1: Single-channel lower part ≤ 1000 μL
Maintenance
®
plus
English (EN)
21
1Piston mount
2Piston
3 Piston spring
6.1.1 Removing the lower part
4Double coil
5 Cylinder (internal)
1. Press the dispensing button completely
down and hold.
2. Remove the ejector sleeve and release
the dispensing button.
3. Push the ring PUSH UP TO RELEASE
upward until the lower part is detached.
4. Take out the lower part.
Maintenance
1 4 52 3 6
Eppendorf Research
22
®
plus
English (EN)
6.1.2 Disassembling the lower part
Prerequisites
• The ejector sleeve has been removed.
• The lower part has been removed from the upper part.
1. Slightly squeeze the stop pins at the
2. Remove the piston mount.
3. Remove the piston spring and the piston.
4. Remove the piston from the piston
piston mount.
spring (not possible for pipettes with
blue dispensing button).
6.2 Disassembling the single-channel pipette ≥ 2.5 mL
Abb. 6-2:Single-channel lower part ≥ 2.5 mL
Fig. 6-2: Single-channel lower part ≥ 2.5 mL
1Piston mount
2 Piston spring
3 Piston guide
4Piston
5 Cylinder with tip cone
6 Filter sleeve with protection filter
6.2.1 Removing the lower part
0000000
0000000
Maintenance
Eppendorf Research
®
plus
English (EN)
1. Unscrew the ejector sleeve.
2. Keep the dispensing button fully
pressed.
3. Turn the lower part approximately 30° to
the right.
The lower part is released from the
upper part.
23
6.2.2 Disassembling the lower part
Prerequisites
• The lower part is removed.
1. Fit the pipette wrench onto the lower
part.
2. Hold the cylinder and unscrew it from
the lower part.
Maintenance
Eppendorf Research
24
English (EN)
®
plus
6.3 Assembling the single-channel pipette ≤ 1000 μL
1. Insert the piston spring.
If using piston springs with double coil, this must point down.
2. Carefully insert the piston into the cylinder from the top.
3. Compress the piston spring with piston and hold.
4. Squeeze the stop pins at the piston mount and attach them.
5. Press on the piston from above and check for free movement.
The piston must be able to move freely without resistance.
6. Insert the lower part into the upper part until it engages.
7. Fit the ejector sleeve.
6.4 Assembling the single-channel pipette ≥ 2 mL
6.4.1 Assembling the lower part
1. Insert the piston into the piston guide.
2. Insert the piston spring into the piston guide.
3. Attach the piston mount and press the piston spring into the piston guide.
4. Turn the piston mount by 90° and let it engage.
5. Insert the lower part into the upper part until it engages.
6. Attach and tighten the ejector sleeve.
6.4.2 Checking the function
This inspection ensures that the pipette has been assembled correctly.
Carry out a gravimetric test of the systematic and random errors.
6.5 Replacing the protection filter ≥ 2 mL
The protection filter in the tip cone must be replaced after every contact with liquids.
1. Place a pipette wrench with the
appropriate opening onto the filter
sleeve.
2. Pull out the filter sleeve.
Maintenance
Eppendorf Research
®
English (EN)
3. Use a pipette tip to push out the filter.
4. Clean the filter sleeve.
5. Insert a new protection filter into the
filter sleeve.
6. Insert the filter sleeve in the tip cone.
plus
25
6.6 Disassembling the multi-channel lower part – 4.5 mm cone spacing
6.6.1 Opening the multi-channel lower part
Prerequisites
• The lower part is detached from the pipette upper part.
1. Slide both latches on the sides of the
lower part down.
2. Remove the housing lid.
Maintenance
Eppendorf Research
26
®
plus
English (EN)
6.6.2 Removing pistons
6.6.3 Removing the cylinder block
Prerequisites
• All pistons are removed.
1. Lift the piston out of the piston mount.
2. Pull the piston out of the cylinder.
1. Lift the clamping bar at its center and
remove it.
2. Slide the cylinder block straight down
and out of the housing case.
The lower part can be cleaned.
Eppendorf Research
Maintenance
English (EN)
6.7 Assembling the multi-channel lower part – 4.5 mm cone spacing
6.7.1 Inserting the cylinder block
Prerequisites
• All pistons are removed.
1. Insert the cylinder block straight into the
housing case.
2. Slide the cylinder block straight into the
housing case.
The cylinder block needs to be flush with
the edge of the housing case.
3. Insert the clamping bar on one side into
the housing case under the lug.
4. Bend the clamping bar and slide it under
the lug on the other side.
The cylinder block is now fixed.
®
plus
27
6.7.2 Insert the pistons
1. Slide the piston into the cylinder.
2. Insert the end of the piston into the
piston mount.
Maintenance
Eppendorf Research
28
®
plus
English (EN)
6.7.3 Closing the multi-channel lower part
1. Attach the housing lid.
2. Slide both latches on the sides of the
lower part up.
6.8 Replacing O-rings – multi-channel lower part
Replace worn or damaged O-rings on multi-channel lower parts.
Applies to multi-channel lower parts:
• 100 μL
• 300 μL
• 1200 μL
6.8.1 Removing the O-ring
Prerequisites
• O-ring tool (included in the delivery package)
1. Push the opening of the O-ring tool
against the tip cone.
2. Supporting the O-ring tool with your
thumb, push it against the tip cone.
The O-ring is cut at one location.
3. Remove the O-ring tool and O-ring.
Eppendorf Research
6.8.2 Mounting a new O-ring – 100 μL and 300 μL
Prerequisites
• Mounting aid (shortened pipette tip)
1. Fit the installation aid on the tip cone.
2. Push the O-ring over the installation aid and onto the tip cone.
The O-ring must be positioned in the groove in the tip cone.
3. Remove the installation aid
4. Attach the pipette tip and check it is seated correctly.
The pipette tip must be firmly seated on the tip cone.
6.8.3 Mounting a new O-ring – 1200 μL
1. Push the O-ring onto the tip cone.
The O-ring must be positioned in the groove in the tip cone.
2. Attach the pipette tip and check it is seated correctly.
The pipette tip must be firmly seated on the tip cone.
6.9 Adjusting the pipette
The execution of changes to the user adjustment and factory adjustment is
described on our website www.eppendorf.com/manuals
6.10 Cleaning
Maintenance
®
plus
29
English (EN)
.
NOTICE! Damage to device from unsuitable cleaning agents or sharp or
pointed objects.
Unsuitable cleaning agents may damage the device.
Do not use corrosive cleaning agents, strong solvents, or abrasive polishes.
Check the compatibility with the materials used.
Please note the information on chemical resistance.
Do not clean the device with acetone or organic solvents with a similar effect.
Do not use sharp or pointed objects to clean the device.
NOTICE! Damage to device due to penetration of liquid.
Only immerse the pipette tip in the liquid.
Do not put the pipette down when the pipette tip is filled.
The pipette itself may not come into contact with the liquid.
Maintenance
Eppendorf Research
30
English (EN)
®
plus
6.10.1 Cleaning and disinfecting the pipette
All single and multi-channel lower parts are wear parts. Clean them after contamination,
use of aggressive chemicals and/or heavy stress. If the lower parts are worn or damaged,
replace these parts.
1. Moisten a cloth with a cleaning agent and a decontamination agent.
2. Remove external contamination.
3. Moisten a new cloth with water.
4. Wipe down the housing.
6.10.2 Cleaning and disinfecting the lower part
Prerequisites
• Heavy contamination caused by ingress of liquid must be removed.
• Lower part has been removed and disassembled.
1. Remove piston grease.
2. Rinse the lower part with cleaning agent or decontamination agent or let it soak.
Observe the contact time recommended by the manufacturer.
3. Thoroughly rinse the lower part with demineralized water.
4. Let it dry.
5. Lubricate the piston or cylinder.
See instructions for use "Grease for pipettes".
6. Assemble the lower part.
6.10.3 Sterilizing the pipette with UV light
The pipette can be sterilized with UV light at 254 nm.
6.11 Autoclaving the pipette
NOTICE! Damage to device due to incorrect handling.
Do not use any additional disinfectants, decontamination agents or sodium
hypochlorite during autoclaving or UV irradiation.
Eppendorf Research
6.11.1 Autoclaving
Autoclave the filter sleeve and the protection filter separately.
The upper part and lower part can be autoclaved in assembled state. The lower
part does not have to be disassembled.
Prerequisites
• The pipette has been cleaned.
• Any residual cleaning agent has been removed.
• The protection filter has been removed.
1. Autoclave the pipette at 121°C and 1 bar overpressure for 20 minutes.
2. Cool the pipette to ambient temperature and let it dry.
For maximum precision and accuracy, a gravimetric test is recommended after
autoclaving.
The piston does not need to be greased following autoclaving.
6.12 Decontamination before shipment
CAUTION! Use of a contaminated device may result in personal injury and
damage to the device.
Clean and decontaminate the device in accordance with the cleaning
instructions before shipping or storage.
Maintenance
®
plus
English (EN)
31
Hazardous substances are:
• solutions presenting a hazard to health
• potentially infectious agents
• organic solvents and reagents
• radioactive substances
• proteins presenting a hazard to health
•DNA
1. Please note the information in the document "Decontamination certificate for product
returns".
It is available as PDF document on our website www.eppendorf.com/decontamination
2. Enter the serial number of the device in the decontamination certificate.
3. Enclose the completed decontamination certificate for returned goods with the device.
4. Send the device to Eppendorf AG or an authorized service center.
.
Maintenance
3
2
1
5
4
Eppendorf Research
32
English (EN)
®
plus
6.13 Lubricating the piston or cylinder
The piston or the cylinder in the lower part of the pipette must be relubricated after
cleaning or after decontamination.
The special grease can be ordered as an accessory. The ordering information can
be found on our webpage www.eppendorf.com/manuals
1 Cotton swab
2Piston
≤ 20 μL
3 Running surface
4Cylinder
5Lower part
> 20 μL
6.13.1 Lubricating the piston
Prerequisites
• For volumes ≤ 20 μL.
• Lower part is disassembled.
1. Place a small amount of grease on the cotton swab.
2. Apply a thin film of grease to the running surface of the piston.
The lower part can now be reassembled.
6.13.2 Lubricating the cylinder
Prerequisites
• For volumes > 20 μL.
• Lower part is disassembled.
1. Place a small amount of grease on the cotton swab.
2. Apply a thin film of grease to the inner wall of the piston.
The lower part can now be reassembled.
7 Technical data
7.1 Adjustable sub-steps – single-channel pipettes
Model Increment
0.1 μL – 2.5 μL 0.002 μL
0.5 μL – 10 μL 0.01 μL
2 μL – 20 μL 0.02 μL
10 μL – 100 μL 0.1 μL
20 μL – 200 μL 0.2 μL
30 μL – 300 μL 0.2 μL
100 μL – 1000 μL 1 μL
0.25 mL – 2.5 mL 2 μL
0.5 mL – 5 mL 0.005 mL
1 mL – 10 mL 0.01 mL
7.2 Adjustable sub-steps – multi-channel pipettes
Model Increment
0.5 μL – 10 μL 0.01 μL
1 μL – 20 μL 0.02 μL
5 μL – 100 μL 0.1 μL
10 μL – 100 μL 0.1 μL
30 μL – 300 μL 0.2 μL
120 μL – 1200 μL 1 μL
Eppendorf Research
Technical data
English (EN)
®
plus
33
7.3 Ambient conditions
Temperature range Relative humidity
Storage without transport
-5 °C – 45 °C 10 % – 95 %
package
Operating conditions 5 °C – 40 °C 10 % – 95 %
Measurement deviations according to Eppendorf AG
Eppendorf Research
34
®
plus
English (EN)
8 Measurement deviations according to Eppendorf AG
8.1 Single-channel pipettes with fixed volume setting
Model Test tip
epT.I.P.S.
Error of measurement
systematic random
± % ± μL ± % ± μL
10 μL
medium gray
0.1 μL – 20 μL
medium gray
1.2 0.12 0.6 0.06
40 mm
20 μL
light gray
0.5 μL – 20 μL L
light gray
0.8 0.16 0.3 0.06
46 mm
10 μL
yellow
20 μL
2 μL – 200 μL
yellow
53 mm
1.2 0.12 0.6 0.06
1.0 0.2 0.3 0.06
yellow
25 μL
1.0 0.25 0.3 0.08
yellow
50 μL
0.7 0.35 0.3 0.15
yellow
100 μL
0.6 0.6 0.2 0.2
yellow
200 μL
0.6 1.2 0.2 0.4
yellow
200 μL
blue
250 μL
50 μL – 1000 μL
blue
71 mm
0.6 1.2 0.2 0.4
0.6 1.5 0.2 0.5
blue
500 μL
0.6 3.0 0.2 1.0
blue
1000 μL
0.6 6.0 0.2 2.0
blue
Measurement deviations according to Eppendorf AG
Eppendorf Research
8.2 Single-channel pipettes with variable volume setting
Model Test tip
epT.I.P.S.
Tes t ing
volume
Error of measurement
systematic random
± % ± μL ± % ± μL
0.1 μL – 2.5 μL
dark gray
0.1 μL – 10 μL
dark gray
34 mm
0.1 μL 48 0.048 12 0.012
0.25 μL 12 0.03 6.0 0.015
1.25 μL 2.5 0.031 1.5 0.019
2.5 μL 1.4 0.035 0.7 0.018
0.5 μL – 10 μL
medium gray
0.1 μL – 20 μL
medium gray
40 mm
0.5 μL 8.0 0.04 5.0 0.025
1 μL 2.5 0.025 1.8 0.018
5 μL 1.5 0.075 0.8 0.04
10 μL 1.0 0.1 0.4 0.04
2 μL – 20 μL
light gray
2 μL – 20 μL
yellow
10 μL – 100 μL
yellow
20 μL – 200 μL
yellow
30 μL – 300 μL
orange
100 μL – 1000 μL
blue
0.25 mL – 2.5 mL
red
0.5 μL – 20 μL L
light gray
46 mm
2 μL – 200 μL
yellow
53 mm
2 μL – 200 μL
yellow
53 mm
2 μL – 200 μL
yellow
53 mm
20 μL – 300 μL
orange
55 mm
50 μL – 1000 μL
blue
71 mm
0.25 mL – 2.5 mL
red
115 mm
2 μL 5.0 0.1 1.5 0.03
10 μL 1.2 0.12 0.6 0.06
20 μL 1.0 0.2 0.3 0.06
2 μL 5.0 0.1 1.5 0.03
10 μL 1.2 0.12 0.6 0.06
20 μL 1.0 0.2 0.3 0.06
10 μL 3.0 0.3 1.0 0.1
50 μL 1.0 0.5 0.3 0.15
100 μL 0.8 0.8 0.2 0.2
20 μL 2.5 0.5 0.7 0.14
100 μL 1.0 1.0 0.3 0.3
200 μL 0.6 1.2 0.2 0.4
30 μL 2.5 0.75 0.7 0.21
150 μL 1.0 1.5 0.3 0.45
300 μL 0.6 1.8 0.2 0.6
100 μL 3.0 3.0 0.6 0.6
500 μL 1.0 5.0 0.2 1.0
1000 μL 0.6 6.0 0.2 2.0
0.25 mL 4.8 12 1.2 3
1.25 mL 0.8 10 0.2 2.5
2.5 mL 0.6 15 0.2 5
®
plus
English (EN)
35
Measurement deviations according to Eppendorf AG
Eppendorf Research
36
®
plus
English (EN)
Model Test tip
epT.I.P.S.
Tes t ing
volume
systematic random
± % ± μL ± % ± μL
0.5 mL – 5 mL
violet
1 mL – 10 mL
turquoise
0.1 mL – 5 mL
violet
120 mm
1 mL – 10 mL
turquoise
165 mm
0.5 mL 2.4 12 0.6 3
2.5 mL 1.2 30 0.25 6.25
5.0 mL 0.6 30 0.15 7.5
1.0 mL 3.0 30 0.6 6
5.0 mL 0.8 40 0.2 10
10.0 mL 0.6 60 0.15 15
8.3 Multi-channel pipettes with fixed cone spacing
Model Test tip
epT.I.P.S.
Tes t ing
volume
systematic random
± % ± μL ± % ± μL
0.5 μL – 10 μL
medium gray
8/12-channel
0.1 μL – 20 μL
medium gray
40 mm
0.5 μL 12 0.06 8.0 0.04
1 μL 8.0 0.08 5.0 0.05
5 μL 4.0 0.2 2.0 0.1
10 μL 2.0 0.2 1.0 0.1
1 μL – 20 μL
pearl white
16/24-channel
1 μL – 20 μL
pearl white
42 mm
1μL12 12 0.12 8 0.08
2μL 8 0.16 5 0.1
10μL 4 0.4 2 0.2
20 μL 2 0.4 1 0.2
5 μL – 100 μL
light yellow
16/24-channel
5 μL – 100 μL
light yellow
53 mm
5 μL 6 0.3 4 0.2
10 μL 3 0.3 2 0.2
50 μL 1.2 0.6 0.8 0.4
100 μL 1 1 0.6 0.6
10 μL – 100 μL
yellow
8/12-channel
30 μL – 300 μL
orange
8/12-channel
120 μL – 1200 μL
dark green
8/12-channel
2 μL – 200 μL
yellow
53 mm
20 μL – 300 μL
orange
55 mm
50 μL – 1250 μL
dark green
103 mm
10 μL 3.0 0.3 2.0 0.2
50 μL 1.0 0.5 0.8 0.4
100 μL 0.8 0.8 0.3 0.3
30 μL 3.0 0.9 1.0 0.3
150 μL 1.0 1.5 0.5 0.75
300 μL 0.6 1.8 0.3 0.9
120 μL 6.0 7.2 0.9 1.08
600 μL 2.7 16.2 0.4 2.4
1200 μL 1.2 14.4 0.3 3.6
Error of measurement
Error of measurement
Measurement deviations according to Eppendorf AG
Eppendorf Research
®
plus
English (EN)
8.4 Test conditions
Test conditions and test evaluation in compliance with ISO 8655, Part 6. Tested using a
standardized analytical balance with evaporation protection.
The three largest testing volumes per tip (10 %, 50 %, 100 % of the nominal
volume) correspond to the specifications in accordance with ISO 8655, Part 2 or
Part 5. The test is to be carried out with these three testing volumes for testing of
the systematic and random error in compliance with the standard. The smallest
adjustable volume serves to provide additional information.
• Number of determinations per volume: 10
• Water according to ISO 3696
• Inspection at 20°C – 27°C
Maximum temperature variation during measurement ±0.5°C
• Dispensing onto the tube inner wall
• Forward pipetting
8.5 Special tips for single-channel pipettes
Model Special tip
epT.I.P.S. Long
Tes t ing
volume
Error of measurement
systematic random
± % ± μL ± % ± μL
0.5 mL – 5 mL
violet
1 mL – 10 mL
turquoise
0.1 mL – 5 mL L
violet
175 mm
1 mL – 10 mL L
turquoise
243 mm
0.5 mL 5.0 25 1.0 5
2.5 mL 3.0 75 0.9 22.5
5.0 mL 2.0 100 0.8 40
1.0 mL 6.0 60 1.0 10
5.0 mL 3.0 150 0.9 45
10.0 mL 2.0 200 0.7 70
37
Ordering information
Eppendorf Research
38
®
plus
English (EN)
9 Ordering information
9.1 Single-channel pipettes with fixed volume setting
Order no.
(International)
Order no. (North
America)
Description
Eppendorf Research plus
single-channel, fixed
3124 000.016 3124000016 10 μL, medium gray
3124 000.024 3124000024 10 μL, yellow
3124 000.032 3124000032 20 μL, light gray
3124 000.040 3124000040 20 μL, yellow
3124 000.059 3124000059 25 μL, yellow
3124 000.067 3124000067 50 μL, yellow
3124 000.075 3124000075 100 μL, yellow
3124 000.083 3124000083 200 μL, yellow
3124 000.091 3124000091 200 μL, blue
3124 000.105 3124000105 250 μL, blue
3124 000.113 3124000113 500 μL, blue
3124 000.121 3124000121 1000 μL, blue
9.2 Single-channel pipettes with variable volume setting
Order no.
(International)
Order no. (North
America)
Description
Eppendorf Research plus
Single-channel, variable
3123 000.012 3123000012 0.1 – 2.5 μL, dark gray
3123 000.020 3123000020 0.5 – 10 μL, medium gray
3123 000.098 3123000098 2 – 20 μL, light gray
3123 000.039 3123000039 2 – 20 μL, yellow
3123 000.047 3123000047 10 – 100 μL, yellow
3123 000.055 3123000055 20 – 200 μL, yellow
3123 000.101 3123000101 30 – 300 μL, orange
3123 000.063 3123000063 100 – 1000 μL, blue
3123 000.144 3123000144 0.25 – 2.5 mL, red
3123 000.071 3123000071 0.5 – 5 mL, violet
3123 000.080 3123000080 1 – 10 mL, turquoise
9.3 Multi-channel pipettes with fixed cone spacing
9.3.1 9 mm cone spacing for 96-well plates
Ordering information
Eppendorf Research
English (EN)
®
plus
39
Order no.
(International)
Order no. (North
America)
Description
Eppendorf Research plus
8-channel
3125 000.010 3125000010 0.5 – 10 μL, medium gray
3125 000.036 3125000036 10 – 100 μL, yellow
3125 000.052 3125000052 30 – 300 μL, orange
3125 000.214 3125000214 120 – 1200 μL, dark green
Eppendorf Research plus
12-channel
3125 000.028 3125000028 0.5 – 10 μL, medium gray
3125 000.044 3125000044 10 – 100 μL, yellow
3125 000.060 3125000060 30 – 300 μL, orange
3125 000.222 3125000222 120 – 1200 μL, dark green
9.3.2 4.5 mm cone spacing for 384-well plates
Order no.
(International)
Order no. (North
America)
Description
Eppendorf Research plus
16-channel
3125 000.079 3125000079 1 – 20 μL, cone spacing 4,5 mm
3125 000.095 3125000095 5 – 100 μL, cone spacing 4,5 mm
Eppendorf Research plus
24-channel
3125 000.087 3125000087 1 – 20 μL, cone spacing 4,5 mm
3125 000.109 3125000109 5 – 100 μL, cone spacing 4,5 mm
The ordering information can be found on our website
www.eppendorf.com/manuals
.
Evaluate Your Manual
Give us your feedback.
www.eppendorf.com/manualfeedback
Your local distributor: www.eppendorf.com/contact
Eppendorf AG · Barkhausenweg 1 · 22339 Hamburg · Germany
eppendorf@eppendorf.com · www.eppendorf.com
Loading...