Fourth-derivative spectrophotometric determination of fungicide ferbam (iron(III) dimethyldithiocarbamate) in a commercial sample and wheat grains using 2,2'-bipyridyl.
A procedure has been developed for the direct fourth-derivative spectrophotometric determination of iron(III) dimethyldithiocarbamate by converting it into an iron(II) 2,2'-bipyridyl complex, which is then dissolved in Triton X-100. Beer's law is obeyed over the concentration range 0.5-20 microg mL(-1 )in the final solution. Various parameters such as the effect of pH and interference of large number of ions on the determination of ferbam have been studied in detail. The method is sensitive, highly selective and can be used for the determination of ferbam in a commercial sample and in mixtures with various dithiocarbamates (ziram, zineb, maneb, etc.) and from wheat grains.
Department of Chemistry, GND University, 143 005, Amritsar, India. malik_chem2002@yahoo.co.uk
Ashok Kumar
AK
Malik
Sonam
S
Bansal
Jatinder Singh
JS
Aulakh
D000935:Antifungal Agents / Q000032:analysis*; D004125:Dimethyldithiocarbamate / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D012639:Seeds / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000379:methods*; D013859:Thiocarbamates; D013997:Time Factors; D014908:Triticum / Q000737:chemistry*
D000935:Antifungal Agents; D004125:Dimethyldithiocarbamate; D013859:Thiocarbamates; C011251:ferbam