摘要
研究了在非离子表面活性剂吐温－８０和乳化剂ＯＰ存在下，于ｐＨ８．５缓冲介质中，铜（Ⅱ）与铜试剂显色反应条件。结果表明：配合物的最大吸收波长为４５３ｎｍ，表观摩尔吸光系数为１．５４×１０４Ｌ·ｍｏｌ－１．ｃｍ－１，铜（Ⅱ）含量在０～７０μｇ／２５ｍｌ范围内符合比耳定律。该法与巯基棉富集分离相结合，应用于天然水及废水中微量铜的测定，结果满意。
he optimum conditions of colour reaction of copperwith the reagent DDTC have been studied. A brown yellow complex is formed from Cu (Ⅱ) and DDTC in thepresenct of Tween-80 and enulgent OP at pH 8. 5. Thecomplex has an absorption maximum at 453 mm. The molar absorptivity is 1. 54×104 L·mol-1·cm-1. Beer's lawis obeyed in the concentration range of 0-70μg/25ml ofCu(Ⅱ). Combined with the concentration of Cu (Ⅱ)byusing sulfhydrylc cotton, the proposed method has beenapplied to the determination of Cu(Ⅱ) in natural waterand waste water with satisfactory results.
出处
《干旱环境监测》
1996年第2期102-104,共3页
Arid Environmental Monitoring
关键词
铜
铜试剂
分光光度法
巯基棉
富集分离
Copper determination
DDTC
Spectrophotometyry
Sulfhydryl cotton
Enriching and separation.
