GB/T 23376-2009Determination of pesticides residues in tea - GC/MS method (English PDF)

1 Scope

This standard specifies the tea organophosphate, organochlorine, pyrethroids and other categories 36 kinds of pesticides (see Appendix A) Residual Gas Chromatography /

Mass spectrometry.

This standard applies to the determination of organic phosphorus, organic chlorine, and other categories 36 kinds of pyrethroid pesticide residues in tea.

The standard method detection limits. See Appendix A.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent

Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research

Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 6379.1 measurement methods and results of Accuracy (trueness and precision) - Part 1. General principles and definitions

GB/T 6379.2 measurement methods and results of Accuracy (trueness and precision) - Part 2. Determine the standard measurement method to repeat

Of the basic methods of reproduction

Principle 3

Tea sample organophosphate, organochlorine and pyrethroid pesticides were accelerated solvent extraction instrument (ASE) + acetonitrile dichloromethane (1 + 1,

Volume ratio) and the extracts were dried after the solvent replacement by gel permeation chromatography (GPC) purified and concentrated by gas chromatography - mass spectrometer detection,

Selected ion chromatographic retention time and qualitative, external standard.

4 Reagents and materials

Unless otherwise indicated, the reagents used were of analytical grade.