发明名称 |
Hanging mercury drop electrode capable of automatic control |
摘要 |
A hanging mercury drop electrode is described which makes use of a capillary tube with an inverted-U shape, removably fastened to an air-tight pressure-resistant cylindrical mercury reservoir. The capillary tube has a sufficiently thin inner diameter (0.35x10-2 to 0.5x10-2 cm) and a sufficient length (40 to 50 cm) such that the viscous forces prevent mercury from flowing through the capillary tube, once a height of the mercury head is selected (1 to 2 cm) which roughly counterbalances the back-pressure acting on the drop surface. To increase the drop size, a pressure higher than the atmospheric pressure is transmitted to the mercury reservoir from a pressure generator via an electromechanical valve, which is controlled by a timer or a microprocessor. The drop becomes stationary as soon as the mercury reservoir is connected with the outer atmosphere via another electromechanical valve. A whole cycle of operations of the present electrode comprises: (1) detachment of a preformed drop by a hammer which knocks the capillary tube; (2) growth of a new drop by application of a pressure higher than the atmospheric pressure to the mercury reservoir; (3) blockage of the drop area by application of the atmospheric pressure to the mercury reservoir; (4) desired electroanalytical measurement on the resulting static mercury drop.
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申请公布号 |
US4548679(A) |
申请公布日期 |
1985.10.22 |
申请号 |
US19830556065 |
申请日期 |
1983.11.29 |
申请人 |
CONSIGLIO NAZIONALE DELLE RICERCHE |
发明人 |
GUIDELLI, ROLANDO;FORESTI, MARIA L. |
分类号 |
G01N27/34;(IPC1-7):G01N27/34 |
主分类号 |
G01N27/34 |
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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