Determination of organochlorine pesticides in apple samples by differential-pulse polarography in emulsified medium

✍ Scribed by A.J. Reviejo; A. González; J.M. Pingarrón; L.M. Polo

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 627 KB
• Volume: 264
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(92)85309-t

✦ Synopsis

The determmatlon of the organochlorme pestlcldes dleldrm, heptachlor, cy-endosulfan, P-endosulfan and endosulfan sulphate and theu mixtures m spiked apple samples was camed out m o&water emulsions formed with ethyl acetate and a mtiure of Hyamme 2389 and Trlton X-405 Extraction of the pestlcldes from the apples was accomphshed usmg n-hexane Clean-up of the extract and fractionation was carried out with a Florlsd column, usmg n-hexane and n-hexane-ethyl acetate (20 1) as eluents The recovenes for each pesticide mdlvldually were about 90% for heptachlor, endosulfan sulphate and both isomers of endosulfan and about 70% for dleldrm at concentration levels of 0 37, 0 93 and 127 pg g-' of apple for heptachlor, dleldrm and endosulfan sulphate, respectively, and 122 pgg -' for each of the endosulfan isomers Similar results were obtained wth binary and ternary mixtures and with a rmxture containing all the pestlcldes studled, mdlcatmg the vahdlty of the extractlon and separation method developed