[Determination of trace iodine based on kinetic-spectrophotometry with malachite green-chloramine T system].
In this paper, a new kinetic-spectrophotometric method for the determination of trace amount of iodine has been proposed. It is based on the iodine catalysed the reaction of malachite green oxidized by chloramine T in hydrochloric acid medium. The method is sensitive, simple and with good selectivity. The linear range of determination of iodine is 0-48 micrograms.L-1, the detection limit is 4.9 x 10(-10) g.mL-1. The method has been used for the determination of trace amount of iodine in food with satisfactory results.
Li
J G
JG
Department of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215006, China.
Wei
Y Q
YQ
Shen
K
K
D002700:Chloramines; D005504:Food Analysis; D007455:Iodine / Q000032:analysis*; D007700:Kinetics; D012394:Rosaniline Dyes; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000379:methods; D014105:Tosyl Compounds
D002700:Chloramines; D012394:Rosaniline Dyes; D014105:Tosyl Compounds; C016300:chloramine-T; C005095:malachite green; D007455:Iodine