Extraction and Clean-Up Method for the Determination of Twenty Organochlorine Pesticide Residues in Tomatoes by GLC-ECD

✍ Scribed by Morelli-Cardoso, Maria Helena W. ;Cardozo, Regina T. M. ;Mello, Jaíza L. ;Abrantes, Shirley ;Menezes, Kátia M. P.

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 48 KB
• Volume: 22
• Category: Article
• ISSN: 0935-6304
• DOI: 10.1002/(sici)1521-4168(19991101)22:11<619::aid-jhrc619>3.0.co;2-0

✦ Synopsis

A method is described for the simultaneous extraction and determination of twenty organochlorine pesticides residues [hexachlorocyclohexane (HCH) isomers (a, b, c, d), aldrin, dieldrin, endrin, heptachlor and its epoxide (HE), hexachlorobenzene (HCB), a-endosulfan, o,p9-DDD, p,p9-DDD, o,p9-DDE, p,p9-DDE, o,p9-DDT, p,p9-DDT, dicofol, methoxychlor, and mirex] that were spiked in tomatoes. Samples were extracted with ethyl acetate, and the extract was subjected to a rapid clean-up using a Florisil column. The residues were determined by GLC-ECD using two columns of different polarity. The calibration graph correlation coefficient ranged from 0.9903 to 0.9990. The recoveries ranged from 95 to 99% with relative standard deviation ranging from 0.5 to 14.7% in the concentration range 0.005 to 0.2 lg/g. The limits of detection ranged from 0.004 to 0.05 lg/g and the limits of quantification ranged from 0.005 to 0.174 lg/g.