A simple method for the determination of malathion in wheat grains is described. The insecticide was extracted with chloroform and the extract treated with a Celite-Nuchar-sodium sulphate mixture to absorb impurities selectively. The hydrolysis was carried out with ethanolic sodium hydroxide solution and the copper complex extracted into cyclohexane. The method is applied to amounts of 50 to 250 µg.
E. Weisenberg, S. Gertner and J. Schoenberg, Analyst, 1968, 93, 443 DOI: 10.1039/AN9689300443
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