氯离子的极谱报导不多,国内只报导过作者的摘要。现简要报导氯离子的极谱行为与分析条件,以及应用于镀铬废水中氯离子的分析。 1.试剂与仪器:氯化钠标准溶液,0.1N;浓硫酸,A.R.;10％硝酸钾溶液;1:1醋酸乙醇混合溶液;Tensly型记录极谱仪,滴汞电极,汞池参比电极的U型电解池。 2.氯离子的极谱行为:在溶液中汞阳极溶解: 2Hg(?)Hg_2~(2+)+2e(1)在0.1NKNO_3溶液中,有氯离子存在时,汞溶解电位由+0.20V移至约+0.15V,向负移动。电极过程为: Chloride ion polarographic report is limited, the country only reported the author’s summary. Now briefly report the polarographic behavior of chloride ions and analysis conditions, as well as the analysis of chloride ions used in chrome wastewater. 1. Reagents and equipment: sodium chloride standard solution, 0.1N; concentrated sulfuric acid, AR; 10% potassium nitrate solution; 1: 1 mixed solution of ethanol; Tensly recording polarography, mercury dropping electrode, mercury pool reference electrode U-cell. Hg2 ~ (2 +) + 2e (1) In the presence of chloride ions in 0.1NKNO_3 solution, the mercury dissolution potential increases from + 0.20V Move to about +0.15 V and move toward negative. Electrode process is: