矩形波ポーラログラフ
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概要
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The momentary changes of the Faradaic and non-Faradaic currents in square wave polarography are theoretically discussed and an instrument for square wave polarography, in which the potential of the square wave and the gating signal were obtained with the timing circuit of the decatrons, is described. As the result of studying the Cd-waves with various positions of gating, it was ascertained that the non-Faradaic current disappears almost within 1/2000 sec; on the other hand, for the Faradaic current to disappear takes at least 1/400 sec. The polarograms were studied, which had been obtained by applying the square waves whose upper and lower edges had various slopes with the change of time constant of the condenser-coupling in the square wave-generating amplifier. There was an optimum slope where the non-Faradaic current did not interfere with the Faradaic current. After the above studies, the determination of 2×10<SUP>-7</SUP><I>M</I> Cd became possible.
- 社団法人 日本分析化学会の論文