发明名称 |
FREMGANGSMAATE OG ANORDNING FOR ELEKTROKJEMISK MAALING AV KONSENTRASJONEN AV OXIDIONER I ET BAD BASERT PAA SMELTEDE HALOGENIDER. |
摘要 |
The invention concerns a process and apparatus for electrochemical measurement of the concentration of oxide ions dissolved in a bath based on molten halides. The process is based on impedance measurement at a low current and a low overvoltage, between an indicator electrode, a reference electrode and a counter electrodes. The real value Zr of the impedance is determined for two frequencies, a low frequency Zr(B) (such as 15-25 Hz) and a high frequency Zr(H) (such as 10-100 kHz); the inverse of the concentration of oxide ions is a linear function of the difference between Zr(B) and Zr(H). This method has a high level of accuracy in the low ranges of concentration of oxide ions. |
申请公布号 |
NO874277(D0) |
申请公布日期 |
1987.10.13 |
申请号 |
NO19870004277 |
申请日期 |
1987.10.13 |
申请人 |
ALUMINIUM PECHINEY |
发明人 |
PICARD, GERARD;BERTAUD, YVES;PRAT, EVELYNE;LEROY, MICHEL |
分类号 |
G01N27/26;C25C3/00;G01N27/02;G01N27/49;(IPC1-7):G01N/ |
主分类号 |
G01N27/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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