Waters Reverse Peptide Kit User Manual

[ CARE AND USE MANUAL ]
Reverse Peptide Kit
CONTENTS I. INTRODUCTION
a. Parts Required b. Additional Materials Required But Not Supplied
II. RECOMMENDED SAMPLE PREPARATION PROCEDURES
a. Sample Preparation Guidelines b. Health and Safety Precautions c. Storage and Handling
III. REVERSE PEPTIDE STANDARD PREPARATION PROTOCOL
a. Diluent b. Reverse Peptide Stock Solutions c. Reverse Peptide Standard Solution Working Concentration
IV. MOBILITY MODE COMMISSIONING TEST
a. Resolution Mode (Positive Ion) b. Saving System Settings
I. INTRODUCTION
The Reverse Peptide Kit (P/N 700005089) contains two well­characterized samples (Ser-Asp-Gly-Arg-Gly and Gly-Arg-Gly-Asp-Ser) used to calibrate ion mobility spectrometry/mass spectrometry (IMS/MS) systems in high-resolution positive-ion mode. Analysts can also use the reverse peptide standard solution prepared from these samples as a reference standard for verifying IMS performance.
The instructions in this manual describe the recommended procedure for preparing the reverse peptide standard solution and performing the mobility mode commissioning test.
a. Parts Required
Table 1: Kit components
Serial Sample
1
2
Ser-Asp-
Gly-Arg-Gly
Gly-Arg-
Gly-Asp-Ser
Supply format
Powder
Powder
Concentration/
weight
1 mg
(–0 +0.2 mg)
1 mg
(–0 +0.2 mg)
Number of
vials
1
1
V. ORDERING INFORMATION
b. Additional Materials Required But Not Supplied
Table 2: Additional materials
Solvents Additives Labware
Acetonitrile (Fisher Scientific high-purity or equivalent­quality solvents)
Water (ELGA or equivalent­quality
(18 MΩ purity) lab water)
>98% purity formic acid (Aristar­grade additives; avoid GPR-grade additives)
20-mL Class A volumetric flasks (2)
30-mL Nalgene container (w/cap)
100-mL graduated measuring cylinder
250-mL Duran laboratory glass bottle (w/cap)
200-μL pipette (and tip) (Gilson or equivalent­quality pipettes)
1000-μL pipette (and tip)
[ CARE AND USE MANUAL ]
II. SAMPLE PREPARATION AND HANDLING GUIDELINES
Waters recommends the following sample preparation materials and procedures to ensure the purity, accurate measurement, and stability of the reverse peptide standard solution.
Note: For detailed information on guidelines for the prevention of system contamination, refer to the document Controlling
Contamination in Ultra Performance LC-MS and HPLC-MS Systems
(P/N 715001307) located in the Waters Knowledge Center.
a. Sample Preparation Guidelines
To maximize the accuracy, precision, and reliability your analytic data, Waters recommends integrating the following practices into your sample preparation protocols:

Thoroughly wash all glassware with a laboratory-cleaning product and rinse with high-purity solvents before using.

Do not wash solvent containers or pipettes with detergents or with other glassware.

Wear suitable powder-free gloves when installing sample vials or performing system maintenance.

Avoid exposing samples to contaminants such as keratins (e.g., dust, skin, hair) plasticizers, polymers).

Use appropriately sized pipettes to ensure accurate volumes are dispensed.

Prepare samples in an ultrasonic liquid processor to ensure they dissolve completely.
b. Storage and Handling
To maintain the quality and stability of samples, do not exceed recommended temperatures or storage times.

Store unused portions of the reverse peptide stock solutions and diluent in a freezer at -20 °C for no longer than 2 weeks.

Aliquot solutions into Nalgene or PTFE containers before freezing.

Refrigerate unused aliquots of the reverse peptide standard solution at 4 °C for no longer than 1 week.

Label all samples with sample name, concentration and composition of solvents, preparation date, and expiration date before storage.

Allow all liquid samples to warm to room temperature before using. Do not refreeze samples after thawing.
III. REVERSE PEPTIDE STANDARD PREPARATION PROTOCOL
a. Diluent (50:50 Acetonitrile: H20 +0.1% Formic Acid)
Preparing the Diluent
Prepare diluent by mixing equal parts acetonitrile and water and adding 0.1% formic acid. Refrigerate unused solution at 4 °C for no longer than 2 weeks.
1. Measure 100 mL LC-MS-grade acetonitrile into a cylinder and pour into a 250-mL Duran bottle.
2. Add 100 mL LC-MS-grade or deionized water to the bottle.
3. Pipette 0.1% formic acid into the bottle.
4. Sonicate the contents of the bottle for 10 minutes.
5. Label the bottle as follows: “50:50 acetonitrile:water (w/ 0.1% formic acid).”
b. Reverse Peptide Stock Solutions
Preparing the Reverse Peptide Stock Solutions
Prepare reverse peptide stock solutions by mixing the reconstituted samples in an ultrasonic liquid processor.
Preparing 1 mg/ml (1 µg/µl) reverse peptide stock solution
1. Pipette 1000 µL of the 50:50 acetonitrile:water (w/0.1% formic acid) diluent into the 1 mg vial of Ser-Asp-Gly-Arg-Gly.
2. Sonicate mixture for 5 minutes.
3. Label as “1 mg/mL SDGAG w/50:50 acetonitrile:water (w/ 0.1% formic acid).”
4. Repeat the procedure with the Gly-Arg-Gly-Asp-Ser sample.
5. Label as “1 mg/mL GAGAS w/50:50 acetonitrile:water (w/ 0.1% formic acid).” Unused samples may be stored in a freezer at -20 °C for no more than 1 month.
Reliant HPLC Columns
2
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