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利用锁定放大器,恒电势仪,压控频率正弦波信号发生器等组装成电解池电阻和容抗的快速测定仪。可以快速地自动测是和绘出阻抗谱图和电阻/容抗～时间图。采用微小恒定振幅正弛交流电流(<10μA)作为微扰,数据可能较为可靠。给出了线路及所需滤波器元件的数据,说明仪器各部份之间的干扰可以减少。测定了滴汞电极在1mol L~(-1)Na_2SO_4溶液中及1mol L~(-1)Na_2SO_4被正庚醇饱和的溶液中的微分电容～电势数值。证明仪器工作良好。另外,从实验数据和理论分析,均表明D.C.Grahame的被广泛引用的有关经典数据有误。本文做了修正。还测定了半导体氧化铁电极在光照下黑暗中的阻抗谱图和氧化银电极充电和停止充电后开路下的电阻～时间图,显示了仪器在电化学研究中利用的可能性。
The use of lock-in amplifier, potentiostat, voltage-controlled frequency sine wave signal generator assembled into electrolytic cell resistance and capacitance of the rapid detector. Automatic measurements and plots of impedance spectra and resistance / capacitance-time plots are fast and automatic. Using small constant amplitude positive relaxation AC current (<10μA) as perturbation, the data may be more reliable. The data for the line and the required filter components are given, showing that the interference between various parts of the instrument can be reduced. The differential capacitance ~ potential values of the droplet mercury electrode in 1mol L ~ (-1) Na_2SO_4 solution and 1mol L ~ (-1) Na_2SO_4 solution saturated with n-heptanol were measured. Proved that the instrument is working well. In addition, from the experimental data and theoretical analysis, it is shown that D.C. Grahame’s widely cited reference to the classic data is incorrect. This article has been amended. The impedance spectra of the semiconductor iron oxide electrode in the dark under light irradiation and the resistance-time diagram of the silver oxide electrode after charging and stopping charging after opening were also measured, indicating the possibility of using the instrument in electrochemical research.