| Polarographic determination of orthophosphate in seawater |
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| 作者姓名： | Chen Liyi |
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| 作者单位： | Department of Chemistry, Jishou University, Jishou, China |
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| 摘 要： | -In the system HCl-Sb (Ⅲ)-ammonium molybdatc-acetone-butanone, PO43-, Sb (Ⅲ) and Mo (VI) form ternary heteropoly acid. This ternary heteropoly acid anion is adsorbed on the dropping mercury electrode and reduced quickly into heteropoly blue. The process of electrochemical reaction will produce a sensitive polarographic wave with peak potential -0.42V (vs S.C.E.). The detection limit is 6×10-8 mol/1. Variable coefficients are 10% and 3% for 0.1 μmol/l and 1 μmol/1 respectively.This method is sensitive, accurate and extremely rapid for analysis of seawater.
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| 收稿时间： | 1986/8/10 0:00:00 |
| 修稿时间： | 6/9/1987 12:00:00 AM |
Polarographic determination of orthophosphate in seawater |
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| Chen Liyi.Polarographic determination of orthophosphate in seawater[J].Acta Oceanologica Sinica,1988,7(1):68-73. |
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| Authors: | Chen Liyi |
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| Institution: | Department of Chemistry, Jishou University, Jishou, China |
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| Abstract: | In the system HCl-Sb (Ⅲ)-ammonium molybdatc-acetone-butanone, PO43-, Sb (Ⅲ) and Mo (VI) form ternary heteropoly acid. This ternary heteropoly acid anion is adsorbed on the dropping mercury electrode and reduced quickly into heteropoly blue. The process of electrochemical reaction will produce a sensitive polarographic wave with peak potential -0.42V (vs S.C.E.). The detection limit is 6×10-8 mol/l. Variable coefficients are 10% and 3% for 0.1 μmol/l and 1 μmol/l respectively.
This method is sensitive, accurate and extremely rapid for analysis of seawater. |
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