发明名称 |
Electrochemical determination of heavy metals in water and apparatus therefor |
摘要 |
A method for electrochemically determining the concentration of heavy metals in water by precipitating the metals at a solid electrode under the influence of a constant negative d-c voltage and subsequently dissolving them by anodic oxidation, in which the metals are precipitated at a platinum metal electrode; the water is then replaced by an electrolytic solution and the precipitated metals are dissolved again by suddenly changing the negative d-c voltage into a constant positive d-c voltage, while the electric charge required for the dissolution is determined and the concentration is determined therefrom; the time of application and the magnitude of the d-c voltage are always kept constant during the precipitation as well as during the dissolution of the metals.
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申请公布号 |
US4146436(A) |
申请公布日期 |
1979.03.27 |
申请号 |
US19780884111 |
申请日期 |
1978.03.07 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
KELLERMANN, WALTER;NISCHIK, HERBERT;STURM, FERDINAND V. |
分类号 |
G01N27/48;(IPC1-7):G01N27/42 |
主分类号 |
G01N27/48 |
代理机构 |
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代理人 |
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地址 |
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