Determination of the fungicide ferbam in wheat grains after adsorption onto microcrystalline naphthalene.
A procedure was developed for the determination of iron(III) dimethyldithiocarbamate by converting it into iron(II)-bathophenanthroline-tetraphenylborate complex, which was then adsorbed onto microcrystalline naphthalene. The absorbance was measured at 534 nm against a reagent blank. Beer's Law was obeyed over the concentration range of 0.4-20 microg mL in final solution. Ten replicate determinations on 70 microg ferbam solutions gave a mean absorbance of 0.36, with a relative standard deviation of 0.91%. The method is sensitive and highly selective. It was applied for the determination of ferbam in a commercial sample and in mixtures with various dithiocarbamates (ziram, zineb, maneb) and wheat grains.
Malik
A K
AK
Dayanand Anglo Vedic College, Department of Chemistry, Jalandhar, Punjab, India.
Malik
A K
AK
D000327:Adsorption; D003460:Crystallization; D004125:Dimethyldithiocarbamate / Q000032:analysis*; D005659:Fungicides, Industrial / Q000032:analysis*; D009281:Naphthalenes / Q000737:chemistry*; D010618:Phenanthrolines / Q000737:chemistry; D011786:Quality Control; D012680:Sensitivity and Specificity; D013053:Spectrophotometry; D013775:Tetraphenylborate; D013997:Time Factors; D014908:Triticum / Q000737:chemistry*
D004125:Dimethyldithiocarbamate; D005659:Fungicides, Industrial; D009281:Naphthalenes; D010618:Phenanthrolines; C031721:naphthalene; D013775:Tetraphenylborate; C006686:bathophenanthroline; C011251:ferbam