Collaborative study of an extension of the Mills et al. method for the determination of pesticide residues in foods
Finsterwalder, C.E.
Journal - Association of Official Analytical Chemists 59(1): 169-171
1976
ISSN/ISBN: 0004-5756 PMID: 1249033 Document Number: 103191
Fifteen laboratories collaboratively determined parathion, o,p′-DDT, p,p′-DDT, and p,p′-DDE in kale, and lindane, dieldrin, heptachlor epoxide, and p,p′-DDE in eggs, using electron capture gas-liquid chromatography (potassium chloride thermionic detector for parathion). Pesticide levels ranged from 0.033 ppm heptachlor epoxide to 3.32 ppm p,p′-DDT. Mean recoveries (± standard deviations) were: parathion 91±15%, o,p′-DDT 99±8%, p,p′-DDT 97±8%, lindane 94±4%, dieldrin 106±8%, heptachlor epoxide 106±5%, p,p′-DDE 94±8% in eggs and 101±9% in kale. The methods have been adopted as official first action.