SN/T 1837-2006Import and export textiles. Determination of the residues of endosulfan and profenofos. GC-MS method (English PDF)

Foreword

Appendix A and Appendix B of this standard are informative annexes.

This standard is proposed and managed by the National Certification and Accreditation Administration.

This standard was drafted. Tianjin Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China.

Drafters of this standard. Guo Wei, Yu Tao, Yan Wei.

This standard is the first industry standard for entry-exit inspection and quarantine.

Determination of endosulfan and profenofos residues in import and export textiles Gas chromatography-tandem mass spectrometry

1 Scope

This standard specifies the method for the determination of alpha-endosulfan, beta-endosulfan and profenofos residues in textiles by gas chromatography.

This standard applies to textile materials and their products.

2 Principle

The sample was extracted with petroleum ether, concentrated, dissolved in n-hexane and made up to volume, using a gas chromatograph (GC/ECD) equipped with an electron capture detector.

The measurement was performed by external standard method and confirmed by ion chromatography with gas chromatography-mass spectrometry (GC/MSD).

3 Reagents and materials

The reagents used were of analytical grade unless otherwise stated.

3.1 Acetone. heavy distillation.

3.2 Petroleum ether. boiling range 60 ° C ~ 90 ° C, heavy distillation.

3.3 n-hexane. heavy distillation.

3.4 Endosulfan, profenofos standard. purity >= 99%.

3.5 Standard working solution. accurately weigh the appropriate amount of alpha-endosulfan, beta-endosulfan and profenofos standard, dissolved in n-hexane and prepared 100 µg/mL of standard stock solution. Dilute into a series of standard working solutions of different concentrations with n-hexane as needed. Standard reserve both the solution and the standard working solution were stored at 4 ° C. The storage period of the standard stock solution was half a year, and the standard working solution was stored for 1 W.

4 Instruments and equipment

4.1 Gas Chromatograph. equipped with an electron capture detector (ECD).

4.2 Gas Chromatography-Mass Spectrometer. equipped with a mass spectrometer (MSD).

4.3 Soxhlet extractor. 250mL.

4.4 Rotate the evaporator.

4.5 Constant temperature water bath.

4.6 Microinjector. 10 µL.

5 Analysis steps