摘要
研究了PAN - 6S和次甲基蓝混合指示剂配合滴定连续测定和铜的行为。在pH值 5 .4的六次甲基四胺—HCl介质中 ,以PAN - 6S和次甲基蓝为混合指示剂 ,EDTA为滴定剂连续滴定和铜 ,滴定终点变化敏锐 ,准确度高 ,铜和在一定的比例范围内相互无干扰。方法可用于合金和废水的测定 ,结果满意。
In this paper,an effettive method for the continuous titration determination of copper and cadmium by 1-(2-pyridylazo)-2-naphthol-6-sulphonic acid and ethylene blue as the complexometric indicator was studied in the medium of 6-methylene tetrameter-hydrochloric acid at pH 5.4.The end point for both copper and cadmium were sharp.The amounts of copper and cadmium didn't interfere with each other in the suitable concentration range.The method has been used for the continuous determination of copper and cadmium in alloys and wastewater with satisfactory results.
出处
《化工时刊》
CAS
2004年第10期56-58,共3页
Chemical Industry Times
