title: Determination of quinomethionate (6-methylquinoline-2,3-diyldithiocarbonate) residues in crops by in situ fluorometry.
abstract: A simple method is described for the quantitative determination of quinomethionate (6-methylquinoline- 2,3 - diyldithiocarbonate) in crops. The pesticide residue is extracted with acetonitrile and partitioned in petroleum ether. After separation from the co-extractives by thin layer chromatography (TLC), the fluorescence is measured directly on a silica gel TLC plate. An average of 89% recovery is obtained at the 0.05 ppm level in apples, peaches, pears, and tomatoes.
mesh_terms: D002855:Chromatography, Thin Layer; D005470:Fluorometry / Q000379:methods; D005638:Fruit / Q000032:analysis*; D008832:Microchemistry; D010573:Pesticide Residues / Q000032:analysis*; D011804:Quinolines / Q000032:analysis*; D011810:Quinoxalines; D012997:Solvents
chemical_list: D010573:Pesticide Residues; D011804:Quinolines; D011810:Quinoxalines; D012997:Solvents; C005266:quinomethionate