GB/T 5009.20-2003 in English

《GB/T 5009.20-2003食品中有机磷农药残留量的测定》由361（国家卫生健康委员会）归口，主管部门为国家卫生健康委员会。
本标准规定了水果、蔬菜、谷类中敌敌畏、速灭磷、久效磷、甲拌磷、巴胺磷、二嗪磷、乙嘧硫磷、甲基嘧啶磷、甲基对硫磷、稻瘟净、水胺硫磷、氧化喹硫磷、稻丰散、甲喹硫磷、克线磷、乙硫磷、乐果、喹硫磷、对硫磷、杀螟硫磷的残留量分析方法。本标准适用于使用过敌敌畏等二十种农药制剂的水果、蔬菜、谷类等作物的残留量分析。

1 Scope
This standard specifies the analysis methods for residues of DDVP, mevinphos, monocrotophos, phorate, propetumphos, diazinon, etrimfos, pirimiphos-methyl, parathion-methyl, kitazine, isocarbophos, po-quinalphos, phenthoate, methdathion, phenamiphos, ethion, dimethoate, quinalphos, parathion and fenitrothion in fruits, vegetables and cereals.
This standard is applicable to the residue analysis for such crops as fruits, vegetables and cereals to which twenty pesticide formulations, e.g. DDVP, have been applied.

2 Principle

Organophosphorous sample, while burning in hydrogen-rich flame, in the form of HPO fragments, emits 526 nm-wavelength characteristic lights which are selected through optical filter before being received by photomultiplier tube. They are converted to electric signals which are amplified by current amplifier and then recorded. Compare the peak area or peak height of the sample with that of the standard and quantify.

3 Reagents

3.1 Acetone.
3.2 Dichloromethane.

Foreword i
Method I Determination of Organophosphorous Pesticide Multi-Residues in Fruits, Vegetables and Cereals 1
1 Scope 1
2 Principle 1
3 Reagents 1
4 Apparatus 2
5 Preparation of Specimen 2
6 Analysis Procedure 3
7 Calculation of Result 3
8 Precision 4
9 Miscellaneous 4
Method II Determination of Organophosphorous Pesticide Residues in Grains, Vegetables and Oils 6
10 Scope 6
11 Principle 6
12 Regents 6
13 Apparatus 7
14 Analysis Procedure 7
15 Determination 9
16 Calculation 9
17 Precision 9
18 Miscellaneous 9
Method III Determination of Organophosphorous Pesticide Residues in Meats and Fishes 12
19 Scope 12
20 Principle 12
21 Regents 12
22 Apparatus 12
23 Analysis Procedure 12
24 Calculation of Result 14
25 Precision 14