BS 5766-22:2001

Foreword
1 Scope
2 Normative references
3 Principle
4 Reagents and materials
5 Apparatus
   5.1 Grinder
6 Sampling
7 Preparation of test sample
8 Procedure
   8.1 General
   8.2 Test portion
   8.3 Extraction
   8.4 Column clean-up
   8.5 Gas chromatography
9 Expression of results
   9.1 Calculation
   9.2 Recovery
10 Confirmation of identity
11 Precision
   11.1 Interlaboratory test
   11.2 Repeatability
   11.3 Reproducibility
12 Test report
Annex A (informative) Examples of GC operating conditions
        for organochlorine pesticides
Annex B (informative) Results of interlaboratory test
Bibliography

Specifies a gas chromatographic method for the determination of residues of organochlorine pesticides in animal feeding stuffs.

This International Standard specifies a gas chromatographic method for the determination of residues of organochlorine pesticides in animal feeding stuffs.

The method is applicable to animal feeding stuffs containing residues of one or more of the following organochlorine pesticides and some of their isomers and degradation products: aldrin, op′-DDE, pp′-DDE, op′-DDT, pp′-DDT, dieldrin, endosulfan, endrin, HCB, α-HCH (α-BHC), β-HCH (β-BHC), γ-HCH (γ-BHC), δ-HCH (δ-BHC), heptachlor, heptachlor epoxide, op′-TDE (op′-DDD), pp′-TDE (pp′-DDD) and methoxychlor.

The lower determination limit for these organochlorine pesticides is 0,005 µg/g. However, the lower determination limit is 0,01 µg/g for op′-DDT and pp′-DDT, and 0,05 µg/g for methoxychlor.