title: A novel method for iodate determination using cadmium sulfide quantum dots as fluorescence probes.
abstract: We have developed a novel method for the determination of iodate based on the carboxymethyl cellulose-capped CdS quantum dots (QDs). Factors affecting the iodate detection were investigated, and the optimum conditions were determined. Under the optimum conditions, the relative fluorescence intensity of CdS quantum dots was linearly proportional to IO(3)(-) over a concentration range from 1.0 × 10(-8) to 1.0 × 10(-5) mol L(-1) with a correlation coefficient of 0.9987 and a detection limit of 6.0 nmol L(-1). Iodide, being oxidized by bromine to form iodate, was detected indirectly. The method was successfully applied to the determination of iodate and total amount of iodine in table salt samples. The related mechanism was also discussed.
authors.affiliation: Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education of China, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, PR China.
authors.forename: Chun-Ran
authors.initials: CR
authors.lastname: Tang
authors.forename: Zhong-hua
authors.initials: ZH
authors.lastname: Su
authors.forename: Bao-Gang
authors.initials: BG
authors.lastname: Lin
authors.forename: Hao-Wen
authors.initials: HW
authors.lastname: Huang
authors.forename: Yun-Long
authors.initials: YL
authors.lastname: Zeng
authors.forename: Shuang
authors.initials: S
authors.lastname: Li
authors.forename: He
authors.initials: H
authors.lastname: Huang
authors.forename: Ya-Jing
authors.initials: YJ
authors.lastname: Wang
authors.forename: Chun-Xiang
authors.initials: CX
authors.lastname: Li
authors.forename: Guo-Li
authors.initials: GL
authors.lastname: Shen
authors.forename: Ru-Qin
authors.initials: RQ
authors.lastname: Yu
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D002266:Carboxymethylcellulose Sodium / Q000737:chemistry; D005456:Fluorescent Dyes; D007452:Iodates / Q000032:analysis*; D007455:Iodine / Q000032:analysis; D057230:Limit of Detection; D045663:Quantum Dots; D017673:Sodium Chloride, Dietary / Q000032:analysis* / Q000592:standards; D013050:Spectrometry, Fluorescence / Q000379:methods; D013440:Sulfides / Q000737:chemistry
chemical_list: D019187:Cadmium Compounds; D005456:Fluorescent Dyes; D007452:Iodates; D017673:Sodium Chloride, Dietary; D013440:Sulfides; C034024:iodized salt; C034939:cadmium sulfide; D007455:Iodine; D002266:Carboxymethylcellulose Sodium