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A novel method for iodate determination using cadmium sulfide quantum dots as fluorescence probes |
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| Authors: | Tang Chun-Ran Su Zhong-hua Lin Bao-Gang Huang Hao-Wen Zeng Yun-Long Li Shuang Huang He Wang Ya-Jing Li Chun-Xiang Shen Guo-Li Yu Ru-Qin |
| Institution: | a 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 b State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China c College of Life Science and Pharmaceutical Engineering, Nanjing University of Technology, 210009 Nanjing, PR China |
| 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 IO3− 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. |
| Keywords: | CdS quantum dots Carboxymethyl cellulose Iodate Iodide Fluorescence quenching Determination |
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