示波极谱滴定法测定工业废水中的酚

Determination of Phenol ul Industrial Waste Water by Oscilloscopic Polarography Titration

在溴化钾－盐酸底液中，用标准溴酸钾溶液作滴定剂，以溴在单微铂电极示波极谱图上的敏锐切口指示滴定终点，测定工业废水中的酚。方法的相对偏差小于１％，变异系数小于０．６％，水样加标回收率为９６％～１０４％。废水的色度、浊度等对测定不产生干扰，无须进行预蒸馏处理，测得的为可溴化酚总量，操作简便、快速。

Determination of phenol in industrial waste water by oscilloscopic polarographytitration was studied.Inpotassium bromide-chlorhydric acid base solution,phenol can be precipitatedwith ttbe titrant of the standard solution of potassium bromate.Bromine gives sharp incission in the cellwith one Pt-microelectrode,which can be used to indicate the end point.The relative feviation and va-riation coefficient are below 1.0% and 0.6%,respectively.The recovery was determined to be 96%～104%。The colour and turbidity of the sample do not influence the determination and hence the sampleneeds no predistillation,the determined samples are the total content of the phenols that can be bronid-ed,The process is very simple and rapid.