title: A new spectrophotometric method for the determination of dithianon in commercial formulations and its residues in foodstuffs.
abstract: A new, simple, and rapid spectrophotometric method for the microdetermination of dithianon, on the basis of its reaction with a dithiocarbamate, is described. The red color, which develops instantaneously when mixing the fungicide with the reagent in acetonitrile, is stable for at least 1 h and is measured at 520 nm. Beer's law is applicable up to 12 micrograms/mL dithianon concentration. The method has been successfully adapted to the analysis of the fungicide in commercial formulations and its residues on grains and apple (fruit and leaves). A photometric titration method for formulation analysis of the fungicide has also been developed.
authors.affiliation: Himachal Pradesh University, Department of Chemistry, Shimla, India.
authors.forename: B C
authors.initials: BC
authors.lastname: Verma
authors.forename: H K
authors.initials: HK
authors.lastname: Thakur
authors.forename: J
authors.initials: J
authors.lastname: Singh
authors.forename: D K
authors.initials: DK
authors.lastname: Sharma
mesh_terms: D000097:Acetonitriles; D000880:Anthraquinones / Q000032:analysis*; D003124:Colorimetry; D004050:Ditiocarb; D002523:Edible Grain / Q000737:chemistry; D005504:Food Analysis / Q000379:methods*; D005638:Fruit / Q000737:chemistry; D005659:Fungicides, Industrial / Q000032:analysis*; D007202:Indicators and Reagents; D010573:Pesticide Residues / Q000032:analysis*; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D000097:Acetonitriles; D000880:Anthraquinones; D005659:Fungicides, Industrial; D007202:Indicators and Reagents; D010573:Pesticide Residues; C018529:dithianone; D004050:Ditiocarb; C032159:acetonitrile