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A method for determination of dazomet residues in crops by high performance liquid chromatography



A method for determination of dazomet residues in crops by high performance liquid chromatography



Journal of Pesticide Science 7(3): 357-362



A procedure was developed for the analysis of dazomet residues in tomato, cucumber and cabbage employing high-performance liquid chromatography (HPLC). The crops were homogenized with silver diethyldithiocarbamate (DDTC-Ag) and extracted with dichloromethane. The addition of DDTC-Ag was necessary for all samples to obtain a good recovery of dazomet. The extract was concentrated and cleaned using a Florisil column. The concentrated eluate was analyzed by HPLC employing a Nucreosil 5 CN column and a 2,2,4-trimethylpentane-ethyl acetate solvent system. Dazomet was detected by UV absorption (285 nm) and 0.5 ng/injection was detectable. Recoveries of spiked samples were 78-95% at 0.05-ppm level and 83-88% at 0.2-ppm level with a lower limit of detection of 0.005-ppm (tomato and cucumber) and 0.01-ppm (cabbage). This HPLC method was more specific for dazomet than the conventional colorimetric method.

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Accession: 001038362

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