Catalytic polarographic determination of total selenium in tea leaves |
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Authors: | Liu X Tu Y Zhao Y Zhu L Liu H Yu H Ding Y Ren Y |
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Institution: | Department of Chemistry, Suzhou University, Suzhou 215006, People's Republic of China. |
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Abstract: | The catalytic polarographic determination of selenium(IV) by use of the SeSO(2-)(3) -KIO(3) system is sensitive, accurate, rapid and requires only small quantities of sample. The detection limit for selenium(IV) is 0.04 ng/ml in the final solution. The working range of the calibration is 0.04-2.5 ng/ml. Se(VI) present can be reduced with hot hydrochloric acid to Se(IV), allowing determination of the total selenium. |
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