GB/T 23211-2008 in English

《GB/T 23211-2008牛奶和奶粉中493种农药及相关化学品残留量的测定 液相色谱-串联质谱法》由469-nq（国家标准委农业食品部）归口，主管部门为国家标准化管理委员会。
本标准规定了牛奶和奶粉中493种农药及相关化学品（参见附录Ａ和附录Ｅ）残留量液相色谱-串联质谱测定方法。
本标准适用于牛奶中482种农药及相关化学品的定性鉴别，441种农药及相关化学品的定量测定；
适用于奶粉中481种农药及相关化学品的定性鉴别，427种农药及相关化学品的定量测定。

1 Scope

This standard specifies the LC-MS-MS method for determining 493 pesticides and related chemicals (see Appendixes A and E) residues in milk and milk powder.
This standard is applicable to the qualitative identification of 482 pesticides and related chemicals and the quantitative determination of 441 pesticides and related chemicals in milk as well as the qualitative identification of 481 pesticides and related chemicals and the quantitative determination of 427 pesticides and related chemicals in milk powder.
In this standard, for the milk having quantitative determination, the method detection limits of 441 pesticides and related chemicals are 0.01μg/L~2.41mg/L (see Appendix A); and for the milk powder having quantitative determination, the method detection limits of 427 pesticides and related chemicals are 0.04μg/kg~8.04mg/kg (see Appendix A).

2 Normative References

The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies
GB/T 6379.1 Accuracy (Trueness and Precision) of Measurement Methods and Results - Part 1: General Principles and Definitions ( GB/T 6379.1-2004, ISO 5725-1:1994, IDT)
GB/T 6379.2 "Accuracy (Trueness and Precision) of Measurement Methods and Results - Part 2: Basic Method for the Determination of Repeatability and Reproducibility of a STANDARD Measurement Method (GB/T 6379.2-2004, ISO 5725-2:1994, IDT)
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods (GB/T 6682-2008, ISO 3696:1987, MOD)

3 Principle

Foreword i
1 Scope
2 Normative References
3 Principle
4 Reagents and Materials
5 Apparatus
6 Sample Preservation
7 Determination Procedure
8 Calculation of Result
9 Precision
Appendix A (Informative) Chinese and English Names, Method Detection Limit, Grouping, Solvent Selection and Concentration of Mixed Standard Solution for 493 Pesticides and Related Chemicals
Appendix B (Informative) Retention Time, Monitoring Ion Pair, Fragmentor in Source and Collision Gas Energy of 493 Pesticides and Related Chemicals
Appendix C (Informative) Multi-response Monitoring (MRM) Chromatogram of 493 Pesticides and Related Chemicals
Appendix D (Informative) Precision Data Table for 493 Pesticides and Related Chemicals
Appendix E (Informative) Cross References in both Chinese and English of 493 Pesticides and Related Chemicals (In Alphabetical Order)