双水相体系中Cu(Ⅱ)的显色反应研究  

Study on Color Reaction of Cu() by Two\|Phase Aqueous System

作　　者：田瑞启[1] 

机构地区：[1]宿县地区农业学校

出　　处：《光谱实验室》1999年第3期302-305,共4页Chinese Journal of Spectroscopy Laboratory

摘　　要：本文研究了铬黑Ｔ（ＥＢＴ）作萃取剂和显色剂，在聚乙二醇－２０００（ＰＥＧ）－Ｎａ２ＳＯ４－ＥＢＴ双水相体系中Ｃｕ（Ⅱ）的显色反应条件及应用。实验结果表明，在ｐＨ８．５缓冲溶液中，将Ｃｕ（Ⅱ）络合物从水溶液中萃取到ＰＥＧ相，其最大吸收波长位于５６０ｎｍ，摩尔吸光系数为３．０５×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，此法用于铝合金中铜的测定。In polyethylene glycol\|2000(PEG)Na2SO4eriochrome black T(EBT)two\|phase aqueous system,the color reaction and application of Cu() by using EBT as extractant and development agent was studied.The results show that complex of Cu() was extracted by PEG phase from the water solution of pH8.5 ,the maxmum absorption of the complex is at 560nm and the molar absorptivity 3.05104Lmol-1cm-1.The proposed method was been applied to the determination of copper in aluminium alloy with satisfactory result.

关 键 词：聚乙二醇 铜 铬黑T 显色反应 测定 光度法 

分 类 号：O614.121[理学—无机化学]