[Spectrophotometry determination of trace selenium(IV) in Chinese herbal medicine by catalytic kinetics. I. RDB and potassium bromate].
Trace Se(IV) can catalyze the discolouring oxidizing reaction of RDB with potassium bromate in nitric acid medium, and the conditions of kinetics has been studied in detail. A new method of kinetics spectrophotometry for determination of trace (IV) is established. The sensitivity of the method is 0.905 microg x L(-1). The range of measurement is 0-9.6 microg x L(-1). The method has been used for determining trace Se(IV) in Chinese herbal medicine with satisfactory results.
Ding
Liang
L
Hebei Medical College Education, Baoding 071002, China.
Shan
Jin-huan
JH
Wang
Xiu-mei
XM
Yao
Zi-hua
ZH
Wang
Yu
Y
D001959:Bromates / Q000737:chemistry*; D002384:Catalysis; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D007700:Kinetics; D008674:Metals, Rare Earth / Q000032:analysis*; D010084:Oxidation-Reduction; D010936:Plant Extracts / Q000737:chemistry*; D012643:Selenium / Q000032:analysis*; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000379:methods*
D001959:Bromates; D004365:Drugs, Chinese Herbal; D008674:Metals, Rare Earth; D010936:Plant Extracts; C019536:potassium bromate; D012643:Selenium