矩形波ポーラログラフ法による硫酸中の塩素イオンの定量
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概要
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A wave which overlapped with that of copper in 10<I>M</I> sulfuric acid, shifted to the side of a more positive potential as the concentration of sulfuric acid became lower. Therefore the wave did not interfere with the determination of copper in 5<I>M</I> sulfuric acid. It was ascertained that the wave was caused by chloride ion since the wave height increased by adding sodium chloride. The chloride ion wave on the square wave polarogram was diminished as increasing the concentration of sulfuric acid over 8 to 12<I>M</I>. The temperature coefficient of wave height of chloride ion in 10<I>M</I> sulfuric acid was about 0.6% at 30°C. The calibration curve obtained with the scanning speed of D. C. applied potential of 0.2V/min, was less linear than that obtained with the scanning speed of 0.1V/min. The overlapped wave height of chloride ion and copper in 10<I>M</I> sulfuric acid was not precisely equal to the sum of each of the chloride ion and the copper wave.
- 社団法人 日本分析化学会の論文