title: [Spectrophotometry determination of trace selenium(IV) in Chinese herbal medicine by catalytic kinetics. I. RDB and potassium bromate].
abstract: 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.
authors.affiliation: Hebei Medical College Education, Baoding 071002, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Ding
authors.forename: Jin-huan
authors.initials: JH
authors.lastname: Shan
authors.forename: Xiu-mei
authors.initials: XM
authors.lastname: Wang
authors.forename: Zi-hua
authors.initials: ZH
authors.lastname: Yao
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
mesh_terms: 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*
chemical_list: D001959:Bromates; D004365:Drugs, Chinese Herbal; D008674:Metals, Rare Earth; D010936:Plant Extracts; C019536:potassium bromate; D012643:Selenium