[Gas chromatography determination of metalaxyl in plant material].
The control of mycosis on potatoes, tomatoes and cucumbers with metalaxyl demands toxicological evaluation of its residues. It was necessary to elaborate a gaschromatographic method for the determination of the active compound. The plant materials are extracted by homogenization with methanole. The clean up is carried out by precipitate of coextractives, liquid-liquid-partition and column chromatography with aluminia. The quantitative determination is performed on 3% OV 225/Varaport 30, 1.95% OV 210 and 1.5% OV 17 on Chromosorb W HP packed columns and a phenylmethylsilicon fused silica capillary column using a N/P-detector. The minimum detectable quantity is in the range of 0.02 to 0.08 ng. Recoveries from 84 to 92% were obtained after fortification with 0.05 to 1.0 mg/kg. Limits of determination are in the range from 0.05 to 0.5 mg/kg.
Seefeld
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D000409:Alanine / Q000032:analysis / Q000031:analogs & derivatives; D002849:Chromatography, Gas; D005506:Food Contamination / Q000032:analysis*; D005659:Fungicides, Industrial / Q000032:analysis*; D006801:Humans; D010573:Pesticide Residues / Q000032:analysis*; D014675:Vegetables / Q000032:analysis*
D005659:Fungicides, Industrial; D010573:Pesticide Residues; C028175:metalaxyl; D000409:Alanine
Gaschromatographische Bestimmung von Metalaxyl in pflanzlichem Material.