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
