Rapid Thin-layer Chromatographic Screening for Parathion in Canned Peaches Without Cleanup
The extensive use of parathion as an insecticide on commercially grown peaches in California has created a need for a rapid screening method for the insecticide in the marketable crop. Using the method of KOVACS (1), with only slight modifications with respect to activation time of thin-layer chromatography (TLC) plates and the use of a simplified developing tank, concentrates of extractives of commercially canned peaches in methylene chloride stripping solution may be chromatographed and subjected to a series of chromogenic spray reactions to yield in about one hour qualitative and semi-quantitative information in the range 0.5 to 11 p.p.m. of residual parathion.
KeywordsSilver Nitrate Solution Citric Acid Solution Immobile Phase Rapid Screening Method Marketable Crop
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