GB/T 20769-2008Determination of 450 pesticides and related chemicals residues in fruits and vegetables - LC-MS-MS method (English PDF)

1 Scope

This standard specifies the apples, oranges, cabbage, celery, tomatoes 450 pesticides and related chemicals (see Appendix A and attached

Catalog E) residual amount of liquid chromatography - tandem mass spectrometry.

This standard applies to apples, oranges qualitative identification, cabbage, celery, tomatoes 450 pesticides and related chemicals residues,

Quantitative determination of 381 kinds of pesticides and related chemicals residues.

381 kinds of pesticides and related chemicals quantitative determination of the standard method detection limit was 0.01µg/kg ~ 0.606mg/kg (see attached

Record 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 6379.1-2004, ISO 5725-1.1994, IDT)

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 (GB/T 6379.2-2004, ISO 5725-2.1994, IDT)

GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)

GB/T 8855 fresh fruits and vegetables sampling method (GB/T 8855-2008, ISO 874. 1980, IDT)

Principle 3

Homogenized sample with acetonitrile extraction, salting centrifugation, Sep-PakVac column 1) purification eluting pesticides and related chemical with acetonitrile and toluene (3 + 1)

Products, liquid chromatography - tandem mass spectrometer, external standard.

4 Reagents and materials

Water as a water GB/T 6682 regulations.