| Chen Liyi. 1988. Polarographic determination of orthophosphate in seawater. Acta Oceanologica Sinica, (1):68－73 |
| Polarographic determination of orthophosphate in seawater |
| Polarographic determination of orthophosphate in seawater |
| Received:August 10, 1986 Revised:June 09, 1987 |
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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. |
| 中文摘要: |
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/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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