Metrohm 920 User Manual
920 Absorber Module
Manual
8.920.8004EN
Metrohm AG
CH-9100 Herisau
Switzerland
Phone +41 71 353 85 85
Fax +41 71 353 89 01
info@metrohm.com
www.metrohm.com
920 Absorber Module
2.920.0010
8.920.8004EN
Manual
09.2013 zst
Teachware
Metrohm AG
CH-9100 Herisau
teachware@metrohm.com
This documentation is protected by copyright. All rights reserved.
Although all the information given in this documentation has been
checked with great care, errors cannot be entirely excluded. Should you
notice any mistakes please send us your comments using the address
given above.
Documentation in additional languages can be found on
http://documents.metrohm.com.
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Table of contents
1 Introduction 1
1.1 Instrument description ......................................................... 1
1.2 Intended use ......................................................................... 2
1.3 About the documentation ................................................... 2
1.3.1 Content and scope .................................................................. 2
1.3.2 Symbols and conventions ........................................................ 3
1.4 Safety instructions ................................................................ 4
1.4.1 General notes on safety ........................................................... 4
1.4.2 Electrical safety ........................................................................ 4
1.4.3 Tubing and capillary connections ............................................. 5
1.4.4 Flammable solvents and chemicals ........................................... 5
1.4.5 Recycling and disposal ............................................................. 5
2 The Combustion IC system 7
Table of contents
2.1 Overview ................................................................................ 7
2.2 System description ............................................................... 8
2.3 Sequence of a determination .............................................. 9
3 Overview of the instrument 11
3.1 Front .................................................................................... 11
3.2 Rear ...................................................................................... 15
4 Installation 17
4.1 Setting up the instrument .................................................. 17
4.1.1 Packaging .............................................................................. 17
4.1.2 Checks .................................................................................. 17
4.1.3 Location ................................................................................ 17
4.2 Overview ............................................................................. 17
4.3 Dosino for ultrapure water ................................................ 20
4.3.1 Assembling the Dosino .......................................................... 23
4.3.2 Feeding the capillary into the instrument ............................... 23
4.3.3 Connecting the ports – Overview ........................................... 24
4.3.4 Inserting the Dosino in the instrument ................................... 33
4.3.5 Connecting the Metrosep I Trap 1 ......................................... 34
4.3.6 Connecting the ultrapure water bottle ................................... 36
920 Absorber Module
4.4 Dosino for the absorber solution ...................................... 39
4.4.1 Assembling the Dosino .......................................................... 40
4.4.2 Connecting the ports – Overview ........................................... 41
4.4.3 Inserting the Dosino in the instrument ................................... 46
4.4.4 Connecting the T connection ................................................. 47
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III
Table of contents
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4.4.5 Connecting the Metrosep A Trap 1 ........................................ 49
4.4.6 Connecting the bottle with the absorber solution .................. 52
4.5 10-port valve ....................................................................... 54
4.5.1 Connecting the ports ............................................................. 55
4.5.2 Connecting the bottle with the standard solution .................. 58
4.5.3 Connecting the bottle with the check standard ...................... 59
4.5.4 Function of the 10-port valve ................................................. 60
4.6 6-port valve ......................................................................... 61
4.6.1 Connecting the ports ............................................................. 62
4.6.2 Mode of operation of the 6-port valve ................................... 65
4.7 Absorber tube ..................................................................... 67
4.8 Connecting the drainage tubing and leak sensor ............ 70
4.8.1 Installing the drainage tubing ................................................ 71
4.8.2 Connecting the leak sensor .................................................... 72
4.9 Connecting the instrument ................................................ 73
4.9.1 Connecting the instrument to the PC ..................................... 73
4.9.2 Connecting the instrument to power supply .......................... 73
4.10 Connecting the 920 Absorber Module to the remaining
components ........................................................................ 74
4.10.1 Connecting the Combustion Module inlet: water infeed ........ 74
4.10.2 Connecting the Combustion Module outlet: Absorber solu-
tion ....................................................................................... 76
4.10.3 Connecting the 930 Compact IC Flex ..................................... 78
5 Start-up 79
6 Operation and maintenance 81
6.1 General ................................................................................ 81
6.2 Door ..................................................................................... 81
6.3 Dosino .................................................................................. 81
6.4 Dosing unit .......................................................................... 81
6.5 Metrosep I Trap 1 ............................................................... 82
6.6 Metrosep A Trap 1 ............................................................. 82
6.7 10-port valve ....................................................................... 82
6.8 6-port valve ......................................................................... 82
6.9 Absorber tube ..................................................................... 83
6.10 Quality Management and qualification with
Metrohm ............................................................................. 85
7 Troubleshooting 86
7.1 Problems and their solutions ............................................. 86
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IV
7.2 Problems with the Dosino ................................................. 86
920 Absorber Module
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8 Technical specifications 87
Table of contents
7.3 Problems with the dosing units ........................................ 86
8.1 Reference conditions .......................................................... 87
8.2 Ambient conditions ............................................................ 87
8.3 Housing ............................................................................... 87
8.4 Dosino .................................................................................. 88
8.5 10-port valve ....................................................................... 88
8.6 6-port valve ......................................................................... 88
8.7 Absorber tube ..................................................................... 89
8.8 Leak sensor ......................................................................... 89
8.9 Power connection ............................................................... 89
8.10 Interfaces ............................................................................. 89
8.11 Safety specification ............................................................ 90
8.12 Electromagnetic compatibility (EMC) ................................ 90
9 Warranty (guarantee) 91
10 Accessories 93
10.1 Scope of delivery ................................................................ 93
10.2 Optional accessories ........................................................ 102
Index 104
920 Absorber Module
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V
Table of figures
Table of figures
Figure 1 Detectable elements .......................................................................... 7
Figure 2 Overview - CIC system ....................................................................... 8
Figure 3 Sequence of the determination ......................................................... 9
Figure 4 920 Absorber Module – Front ......................................................... 11
Figure 5 920 Absorber Module – Front ......................................................... 13
Figure 6 920 Absorber Module – Rear ........................................................... 15
Figure 7 Capillaries and tubings in use – Overview ........................................ 18
Figure 8 Installing the Dosino for ultrapure water .......................................... 20
Figure 9 Connect the Dosino for ultrapure water .......................................... 25
Figure 10 Installing the Dosino for the absorber solution ................................. 39
Figure 11 Connect the Dosino for the absorber solution .................................. 42
Figure 12 Feed the capillary for the absorber solution into the instrument ....... 50
Figure 13 Connecting the 10-port valve .......................................................... 54
Figure 14 Connecting the 10-port valve .......................................................... 56
Figure 15 10-port valve – Ports ....................................................................... 60
Figure 16 10-port valve – Normal valve switchover and with a secured port .... 61
Figure 17 Connecting the 6-port valve ............................................................ 62
Figure 18 Connecting the 6-port valve ............................................................ 64
Figure 19 6-port valve – Ports ......................................................................... 65
Figure 20 6-port valve – Valve positions .......................................................... 66
Figure 21 Connect the absorber tube .............................................................. 67
Figure 22 Combustion tube – Inlet .................................................................. 75
Figure 23 Combustion tube – Outlet ............................................................... 76
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920 Absorber Module
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1 Introduction
1.1 Instrument description
The 920 Absorber Module forms part of the Combustion IC system, which
includes a Combustion Module and an ion chromatograph in addition to
the 920 Absorber Module. The Combustion IC system can be used for
digesting solid and liquid combustible samples. The Combustion IC system's prime application is the determination of halogenides and sulfur.
The 920 Absorber Module is the connecting link between combustion and
IC analysis in the Combustion IC system. The 920 Absorber Module
absorbs the combustion gases in an aqueous medium and transfers it into
the ion chromatography system. The 920 Absorber Module performs the
necessary Liquid Handling and enables the application of various sample
preparation techniques, such as matrix elimination, preconcentration and
automated calibration.
1 Introduction
The 920 Absorber Module is comprised of the following modules:
Dosino for ultrapure water
A Dosino with a 5 mL dosing unit is inserted in the back in the 920
Absorber Module. This Dosino serves to dose water for the water infeed
during combustion and for the transfer of the absorption solution to the
IC instrument. Furthermore, it is used for the Liquid Handling.
Dosino for the absorber solution
A Dosino with a 10 mL dosing unit is inserted in the front of the 920
Absorber Module. This Dosino serves to dose the absorber solution into
the absorber tube.
10-port valve
The 10-port valve is the centerpiece of the Liquid Handling; it serves as a
switch-over point between the various liquid flows.
6-port valve
The 6-port valve serves as a switch-over point between the two liquid
flows. The sample loop allows a precisely defined sample amount to be
measured before it is transferred to the analyzer.
920 Absorber Module
Absorber tube
The combustion gases are absorbed by a solution in the absorber tube.
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1.2 Intended use
Leak sensor
The leak sensor detects leaking liquid that collects in the instrument's base
tray. Liquid that leaks in the instrument is routed to the base tray using
drainage tubing and detected there.
1.2 Intended use
The 920 Absorber Module represents the connecting link between combustion and IC analysis in a Combustion IC system. It absorbs the combustion gases in an absorber solution and transfers the resulting sample to an
ion chromatograph. Furthermore, the 920 Absorber Module allows additional sample preparation techniques to be applied.
The present instrument is suitable for processing chemicals and flammable
samples. Usage of the 920 Absorber Module therefore requires the user
to have basic knowledge and experience in handling toxic and caustic
substances. Knowledge with respect to the application of the fire prevention measures prescribed for laboratories is also mandatory.
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1.3 About the documentation
CAUTION
Please read through this documentation carefully before putting the
instrument into operation. The documentation contains information
and warnings which the user must follow in order to ensure safe operation of the instrument.
1.3.1 Content and scope
This manual focuses on the 920 Absorber Module instrument, which
forms part of the Combustion IC system.
Separate manuals exist for the other modules of the Combustion IC system:
￭ Manuals for the Combustion Module including Auto Boat Drive (ABD)
and optional sampler (MMS 5000) from Analytik Jena (PDFs available
on the enclosed CD)
￭ Manual for 930 Compact IC Flex
￭ Manual for 800 Dosino
￭ Manual for 807 Dosing Unit
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920 Absorber Module
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1.3.2 Symbols and conventions
The following symbols and formatting may appear in this documentation:
Method Dialog text, parameter in the software
File ▶ New Menu or menu item
[Next] Button or key
1 Introduction
Cross-reference to figure legend
The first number refers to the figure number, the second to the instrument part in the figure.
Instruction step
Carry out these steps in the sequence shown.
WARNING
This symbol draws attention to a possible life-threatening hazard or risk of injury.
WARNING
This symbol draws attention to a possible hazard due
to electrical current.
WARNING
This symbol draws attention to a possible hazard due
to heat or hot instrument parts.
WARNING
This symbol draws attention to a possible biological
hazard.
CAUTION
This symbol draws attention to possible damage to
instruments or instrument parts.
NOTE
This symbol highlights additional information and
tips.
920 Absorber Module
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1.4 Safety instructions
1.4 Safety instructions
1.4.1 General notes on safety
WARNING
This instrument may only be operated in accordance with the specifications in this documentation.
This instrument has left the factory in a flawless state in terms of technical
safety. To maintain this state and ensure non-hazardous operation of the
instrument, the following instructions must be observed carefully.
1.4.2 Electrical safety
The electrical safety when working with the instrument is ensured as part
of the international standard IEC 61010.
WARNING
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Only personnel qualified by Metrohm are authorized to carry out service
work on electronic components.
WARNING
Never open the housing of the instrument. The instrument could be
damaged by this. There is also a risk of serious injury if live components
are touched.
There are no parts inside the housing which can be serviced or replaced
by the user.
Mains voltage
WARNING
An incorrect mains voltage can damage the instrument.
Only operate this instrument with a mains voltage specified for it (see
rear panel of the instrument).
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920 Absorber Module
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Protection against electrostatic charges
WARNING
Electronic components are sensitive to electrostatic charges and can be
destroyed by discharges.
Do not fail to pull the mains cable out of the mains connection socket
before you set up or disconnect electrical plug connections at the rear
of the instrument.
1.4.3 Tubing and capillary connections
CAUTION
Leaks in tubing and capillary connections are a safety risk. Tighten all
connections well by hand. Avoid applying excessive force to tubing
connections. Damaged tubing ends lead to leakage. Appropriate tools
can be used to loosen connections.
1 Introduction
Check the connections regularly for leakage. If the instrument is used
mainly in unattended operation, then weekly inspections are mandatory.
1.4.4 Flammable solvents and chemicals
WARNING
All relevant safety measures are to be observed when working with
flammable solvents and chemicals.
￭ Set up the instrument in a well-ventilated location (e.g. fume cup-
board).
￭ Keep all sources of flame far from the workplace.
￭ Clean up spilled liquids and solids immediately.
￭ Follow the safety instructions of the chemical manufacturer.
1.4.5 Recycling and disposal
This product is covered by European Directive 2002/96/EC, WEEE – Waste
from Electrical and Electronic Equipment.
920 Absorber Module
The correct disposal of your old equipment will help to prevent negative
effects on the environment and public health.
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1.4 Safety instructions
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More details about the disposal of your old equipment can be obtained
from your local authorities, from waste disposal companies or from your
local dealer.
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920 Absorber Module
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2 The Combustion IC system
2.1 Overview
Combustion is a sample preparation technique that uses burning to digest
a sample. Solid, liquid and gaseous samples that are flammable can be
digested using combustion. Combustion IC is particularly suited for determining the following elements:
2 The Combustion IC system
920 Absorber Module
Figure 1
An additional instrument is required for the determination of gaseous
samples: the LPG/GSS Module (2.136.0720).
Detectable elements
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2.2 System description
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2.2 System description
Depending on the application, the Combustion IC system consists of the
following instruments:
Type of sample Instruments Manufacturer
solid/liquid samples only ￭ Combustion Module with Auto Boat Drive (ABD)
(2.136.0700)
￭ optional: sampler (MMS 5000)
￭ 920 Absorber Module (2.920.0010)
￭ 930 Compact IC Flex Oven SeS/PP/Deg (2.930.2560)
gaseous samples only ￭ Combustion Module with LPG/GSS Module (2.136.0730) Analytik Jena
￭ 920 Absorber Module (2.920.0010)
￭ 930 Compact IC Flex Oven SeS/PP/Deg (2.930.2560)
solid, liquid and gaseous
samples
￭ Combustion Module with Auto Boat Drive (ABD)
(2.136.0700)
￭ LPG/GSS Module (2.136.0720)
￭ 920 Absorber Module (2.920.0010)
￭ 930 Compact IC Flex Oven SeS/PP/Deg (2.930.2560)
Analytik Jena
Metrohm
Metrohm
Analytik Jena
Metrohm
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Figure 2 Overview - CIC system
The sample is combusted in the Combustion Module.
The gases generated during combustion are dissolved into an absorber
solution in the 920 Absorber Module and are optimized for analysis using
suitable sample preparation techniques.
In the end, the absorption solution is preconcentrated in an ion chromatograph and analyzed.
The entire process is controlled and monitored using MagIC Net software.
The analysis data is saved in the software's database.
920 Absorber Module
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Start determination
(CIC system)
Rinse absorber tube and
provide absorber solution
(920 Absorber Module)
Sample input
(Combustion Module)
Rinse capillary f. combustion
gases w. absorber solution
(920 Absorber Module)
Absorption of
combustion gases
(920 Absorber Module)
Optional: Water infeed
(920 Absorber Module)
Combustion
(Combustion Module)
Fill loop with
absorption solution
(920 Absorber Module)
Matrix elimination
(930 Compact IC Flex)
Re-rinse absorber tube
(920 Absorber Module)
IC determination
(930 Compact IC Flex)
2.3 Sequence of a determination
A determination in the Combustion IC system runs according to the following diagram:
2 The Combustion IC system
Figure 3 Sequence of the determination
920 Absorber Module
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2.3 Sequence of a determination
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NOTE
Do not mix these up!
￭ Absorber solution: e.g. H
￭ Absorption solution: Combustion gases dissolved in the absorber
solution for oxidizing sulfur oxides.
2O2
solution.
The determination is controlled entirely by MagIC Net. You can find a
detailed description of the sequence in the online help for MagIC Net
under the title "Combustion sequence".
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1
2
6
11
7
9
10
3
5
4
8
3 Overview of the instrument
3.1 Front
Module overview
3 Overview of the instrument
Figure 4 920 Absorber Module – Front
Bottle holder
1
Protects the instrument from contamination
and provides the space for the liquid containers.
Transfer tubing
2
Pre-installed. Connects the 10-port valve
with the Dosino.
920 Absorber Module
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3.1 Front
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10-port valve
3
For the software-controlled connection of
10 ports.
Holding clamps
5
To hold the absorber tube.
Base tray
7
Equipped with a leak sensor.
Dosino holder
9
Two holders for the two Dosinos. One on
the back panel and one on the side panel.
6-port valve
11
For sample preparation and sample transfer
to the analysis instrument.
Holding clamps
4
Two holding clamps that hold the trap columns.
Bottle holder
6
Provides space for a 100 mL bottle, e.g., for
the standard solution.
Standby indicator
8
Flashes while the instrument is being
started.
Lights up when the instrument is ready for
operation.
Accessory space
10
Space for the Dosinos, the trap columns and
the absorber tube.
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12
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5
2
1
1
1
1
1
1
6
1
1
1
1
3
3
44
3
3
Capillary feedthroughs and cable
feed-throughs
3 Overview of the instrument
Capillary guides
1
To arrange capillaries and tubings in the
instrument.
Figure 5 920 Absorber Module – Front
Capillary guide
2
For the combustion gas inlet capillary.
920 Absorber Module
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3.1 Front
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Capillary feed-throughs
3
Between instrument and base tray. For feeding capillaries from the front to the sides of
the instrument.
Capillary openings
5
For guiding capillaries and tubings out of the
instrument.
Capillary feed-throughs
4
Between instrument and base tray. For feeding capillaries from the front to the rear of
the instrument.
Cable opening
6
For guiding Dosino cables out of the instrument.
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920 Absorber Module
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11
1
8
2
3
5
6
11
13
14
10
4
9
12
7
11
3.2 Rear
3 Overview of the instrument
Figure 6 920 Absorber Module – Rear
Cable opening
1
For guiding Dosino cables out of the instrument.
USB connection sockets
3
Two USB connection sockets for connecting
instruments with USB connector, labeled
with USB 1 and USB 2.
PC connection socket
2
For connecting a PC with a USB cable.
MSB connection sockets
4
Two MSB connection sockets for connecting
instruments with MSB connector, labeled
with MSB 1 and MSB 2.
920 Absorber Module
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3.2 Rear
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Extension Module connection socket
5
Connection socket for an 872 Extension
Module or an 891 Professional Analog Out.
Leak sensor connection socket
7
For connecting the leak sensor connection
cable.
Type plate
9
With article number and barcode.
Drain nozzle
11
Enables liquids that have leaked from the
bottle holder and inside the instrument to
drain.
Power socket
13
For connecting the power supply cable.
Detector connection sockets
6
Two connection sockets for connecting up
to two detectors, labeled as Detector 1
and Detector 2.
Capillary openings
8
Five openings on the back panel for guiding
capillaries and and tubings out of the instrument.
Leak sensor cable
10
Extractable. Coiled up in the base tray. Must
be connected to the leak sensor connection
socket.
Heat sink
12
To remove heat from inside the instrument.
Caution: May become hot.
On/off switch
14
For switching the instrument on and off.
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920 Absorber Module
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4 Installation
4.1 Setting up the instrument
4.1.1 Packaging
The instrument is supplied in highly protective special packaging together
with the separately packed accessories. Keep this packaging, as only this
ensures safe transportation of the instrument.
4.1.2 Checks
Immediately after receipt, check whether the shipment has arrived complete and without damage by comparing it with the delivery note.
4.1.3 Location
The instrument has been developed for operation indoors and may not be
used in explosive environments.
4 Installation
Place the instrument in a location of the laboratory which is suitable for
operation, free of vibrations, protected from corrosive atmosphere, and
contamination by chemicals.
The instrument should be protected against excessive temperature fluctuations and direct sunlight.
4.2 Overview
Installation of the 920 Absorber Module
The 920 Absorber Module is provided with a wide array of accessories.
These accessory parts have to be installed before the instrument can be
put into operation.
Procedure
We suggest proceeding as follows to simplify the complex installation:
1. Install the Dosino for ultrapure water including a trap column and
2. Install the Dosino for the absorber solution including a trap column,
3. Connect the 10-port valve and install the bottles for the standard
4. Connect the 6-port valve (see Chapter 4.6, page 61).
5. Install and connect the absorber tube (see Chapter 4.7, page 67).
6. Connect the Combustion Module and the 930 Compact IC Flex (see
ultrapure water bottle (see Chapter 4.3, page 20).
bottle with absorber solution and T connector (see Chapter 4.4, page
39).
solution and a check standard (see Chapter 4.5, page 54).
Chapter 4.10, page 74).
920 Absorber Module
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4.2 Overview
Capillaries and tubings
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Figure 7 Capillaries and tubings in use – Overview
PTFE capillary, 0.75 mm ID / 3 m
1
(6.1803.160)
Connection between the 6-port valve and
the waste container.
PTFE capillary, 0.75 mm ID / 3 m
3
(6.1803.160)
Approx. 80 cm. Connection between the
10-port valve and the bottle with the standard solution.
PTFE capillary, 0.75 mm ID / 3 m
5
(6.1803.160)
Approx. 60 cm. Connection between the
10-port valve and the absorber tube.
PTFE capillary, 0.75 mm ID / 3 m
7
(6.1803.160)
Connection between the 10-port valve and
the waste container.
PEEK capillary, 0.5 mm ID / 15 cm
2
(6.1831.040)
Connection between the 6-port valve and
the 10-port valve.
PTFE capillary, 0.75 mm ID / 3 m
4
(6.1803.160)
Approx. 80 cm. Connection between the
10-port valve and the bottle with the check
standard.
PTFE capillary, 0.75 mm ID / 3 m
6
(6.1803.160)
Approx. 5 cm. For aspirating air segments.
PTFE capillary, 1/8 in. / 1/16 in. ID / 1.5
8
m
Connection between the absorber tube and
the Combustion Module.
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920 Absorber Module
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4 Installation
PTFE capillary, 0.5 mm ID / 3 m
9
(6.1803.030)
Connection between the Metrosep A Trap 1
- 100/4.0 trap column (6.1014.000) and the
Combustion Module.
FEP tubing M6 for 920, 150 cm
11
(6.1838.020)
Aspiration tubing for the absorber solution.
Connection between the Dosino with the
absorber solution and the bottle with the
absorber solution.
FEP tubing M6 for 920, 9 cm
13
(6.1838.040)
Connection between the Dosino with ultrapure water and the T connector.
FEP tubing M6 for 920, 150 cm
15
(6.1838.020)
Aspiration tubing for ultrapure water. Connection between the Dosino with the water
bottle.
PTFE capillary, 0.5 mm ID / 3 m
10
(6.1803.030)
Approx. 20 cm. Connection between the
Dosino with the absorber solution and the
Metrosep A Trap 1 - 100/4.0 trap column
(6.1014.000).
FEP tubing M6 for 920, 9 cm
12
(6.1838.040)
Connection between the Dosino with the
absorber solution and the T connector.
PTFE capillary, 0.5 mm ID / 3 m
14
(6.1803.030)
Connection between the Dosino with ultrapure water and the Combustion Module.
PTFE capillary, 0.5 mm ID / 3 m
16
(6.1803.030)
Approx. 30 cm. Connection between the
Dosino with ultrapure water and the Metrosep I Trap 1 - 100/4.0 trap column
(6.1014.200).
PTFE capillary, 0.5 mm ID / 3 m
17
(6.1803.030)
Approx. 40 cm. Connection between the
Metrosep I Trap 1 - 100/4.0 trap column
(6.1014.200) and the 6-port valve.
PTFE capillary, 0.5 mm ID / 3 m
18
(6.1803.030)
Connection between the 6-port valve and
the 930 Compact IC Flex.
Colored sleeves Different liquids move throughout the 920 Absorber Module. In order to
provide you an overview of the different flow paths, we recommend using
the provided colored sleeves as follows to code the capillaries that route
the distinct liquids:
Table 1 Recommended color codes for the flow paths
Liquid Colored sleeve
Ultrapure water blue
Absorber solution yellow
Standard solution black
Check standard red
Waste white
920 Absorber Module
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4.3 Dosino for ultrapure water
NOTE
The colored sleeves are heat-shrink tubing; this means they shrink when
they are exposed to heat.
Slip the colored sleeve over the capillary and secure it to the desired
spot by heating it, for example by using a hairdryer.
4.3 Dosino for ultrapure water
The Dosino for ultrapure water is installed first.
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20
Figure 8
FEP tubing M6 for 920, 9 cm
13
(6.1838.040)
Connection between the Dosino with ultrapure water and the T connection.
Installing the Dosino for ultrapure water
PTFE capillary, 0.5 mm ID / 3 m
14
(6.1803.030)
Connection between the Dosino with ultrapure water and the Combustion Module.
920 Absorber Module
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4 Installation
FEP tubing M6 for 920, 150 cm
15
(6.1838.020)
Aspiration tubing for ultrapure water. Connection between the Dosino with the water
bottle.
PTFE capillary, 0.5 mm ID / 3 m
17
(6.1803.030)
Approx. 40 cm. Connection between the
Metrosep I Trap 1 - 100/4.0 trap column
(6.1014.200) and the 6-port valve.
The Dosino is equipped with a 5 mL dosing unit and is inserted in the back
in the accessory space (4-10). It has three tasks:
￭ Dosing the water infeed during combustion.
￭ Dosing the transfer water for matrix elimination of the sample.
￭ Liquid Handling.
Dosing the water infeed during combustion
PTFE capillary, 0.5 mm ID / 3 m
16
(6.1803.030)
Approx. 30 cm. Connection between the
Dosino with ultrapure water and the Metrosep I Trap 1 - 100/4.0 trap column
(6.1014.200).
920 Absorber Module
Feeding water in at the combustion tube's inlet supports the combustion
process and increases the recovery rate, particularly for fluoride. To do so,
the Dosino aspirates the ultrapure water from the bottle and doses a very
small amount through port 4 to the combustion tube's inlet. The time and
quantity of the water infeed are defined in MagIC Net™.
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21
4.3 Dosino for ultrapure water
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Dosing transfer water for the sample
The transfer water transports the sample to the IC instrument. In order to
obtain accurate analysis results, the transfer water has to be free of ionic
contamination. To remove all traces of ionic contamination, a Metrosep I
Trap 1 – 100/4.0 (6.1014.200) column is used between the Dosino for
ultrapure water and the 6-port valve.
The Dosino aspirates ultrapure water from the bottle and starts by dosing
it to the Metrosep I Trap 1 – 100/4.0 (6.1014.200) through port 1 and to
port 5 of the 6-port valve from there.
Liquid Handling
A Dosino can either aspirate or discharge defined quantities of liquids via
its four ports. In conjunction with the 10-port valve, it is used to transport
liquids through the Combustion IC system. This process is called Liquid
Handling.
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Port 3 of the Dosino is connected to transfer tubing and is used for Liquid
Handling.
920 Absorber Module
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