GB/T 31126-2014Textiles - Determination of perfluorinated and polyfluorinated compounds - Part 1: Liquid chromatography-tandem mass spectrometry method (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document is Part 1 of GB/T 31126 "Determination of Perfluorinated and Polyfluorinated Compounds in Textiles". GB/T 31126 has been published as follows.

Part 2.

---Part 1: Liquid Chromatography-Tandem Mass Spectrometry;

---Part 2: Gas Chromatography-Mass Spectrometry this document replaces GB/T 31126-2014 "Determination of Perfluorooctane Sulfonyl Compounds and Perfluorocarboxylic Acids in Textiles", and is consistent with GB/T 31126-Compared to 2014, aside from structural adjustments and editorial changes, the main technical changes are as follows.

---The target object to be tested has been added (see Chapter 1);

---The terminology and definition for perfluorooctane sulfonyl compounds have been removed (see section 3.1 of the 2014 edition);

---The organic phase filter membrane has been modified (see 5.9, 5.7 in the 2014 edition);

---An analytical balance has been added (see 6.2);

---A volumetric flask has been added (see 6.8);

---Sample preparation and extraction have been modified (see 7.2, 2014 version 7.2);

---The retention time for each target analyte has been increased (see 7.3.2);

---The calculation formula has been changed (see 9.1, 9.2, and 8.1 and 8.2 in the 2014 version);

---The result description has been changed (see 9.3, 8.3 in the 2014 version);

---The limits of quantitation for each target analyte have been revised and expanded (see Chapter 10, 9.1 of the 2014 edition).

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China National Textile and Apparel Council.

This document is under the jurisdiction of the National Technical Committee on Standardization of Textiles (SAC/TC209).

Introduction

GB/T 31126 is a test method standard for the determination of perfluorinated and polyfluorinated compounds in textiles. GB/T 31126 is proposed to consist of the following parts.

constitute.

---Part 1: Liquid Chromatography-Tandem Mass Spectrometry. The purpose is to specify the reagents, instruments, and setup required for liquid chromatography-tandem mass spectrometry.

Requirements related to preparation, test procedures, and result calculation.

---Part 2: Gas Chromatography-Mass Spectrometry. The purpose is to specify the reagents, instruments, equipment, and experimental procedures used in gas chromatography-mass spectrometry.

Requirements related to steps, result calculation, etc.

Determination of perfluorinated and polyfluorinated compounds in textiles Part 1: Liquid Chromatography-Tandem Mass Spectrometry Warning. This document should be used by personnel with practical experience in formal laboratory work. This document does not address all potential safety issues.

Users are responsible for taking appropriate safety and health measures and ensuring compliance with relevant national regulations.

1 Scope

This document describes a method for determining perfluorinated and polyfluorinated compounds in textiles using liquid chromatography-tandem mass spectrometry (LC-MS/MS).

Note. Perfluorinated and polyfluorinated compounds and their salts are represented by the 30 compounds in Appendix A.

This document applies to all types of textile products.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 4669 Textiles - Determination of mass per unit length and mass per unit area of woven fabrics GB/T 6682 Specifications and test methods for water used in analytical laboratories GB/T 8170 Rules for rounding off numerical values and the representation and determination of limiting values

3 Terms and Definitions

This document does not contain any terms or definitions that need to be defined.

4 Principles

Perfluorinated and polyfluorinated compounds in textiles were extracted with methanol by ultrasonic extraction. The extract was concentrated, filtered through a microporous membrane, and analyzed by liquid chromatography-tandem mass spectrometry.

Determination was performed by LC-MS/MS, and quantification was performed by external standard method.

5 Reagents and Materials

Unless otherwise specified, all reagents are of chromatographic grade.

5.1 Water. Grade I water conforming to GB/T 6682.

5.2 Methanol.

5.3 Ammonium acetate.

5.4 Ammonium acetate aqueous solution. 0.005 mol/L. Weigh 0.385 g of ammonium acetate (5.3), dissolve it in water and make up to 1000 mL, then shake well.

5.5 Perfluorinated and polyfluorinated compound reference materials/standard samples. Purity >=95% as specified in Appendix A.

5.6 Standard Stock Solutions. Accurately weigh appropriate amounts of the standard samples/standard substances listed in Table A.1, dissolve and dilute to volume with methanol (5.2), and prepare separate solutions.

Prepare a standard stock solution with a mass concentration of 100 mg/L.