摘要
在ｐＨ４．７ 酸性介质中，Ｃｕ（Ⅱ）与４－（５－氧－２－吡啶偶氮）－１，３－二氨基苯生成有色络合物，与强酸性阳离子交换树脂交换吸附，可进行树脂相分光光度法测定痕Ｃｕ（Ⅱ）．最大吸收波长λ_ｍａｘ＝５００ｍｍ，表观摩尔吸光系数８＝２．８ｘ１０~５，Ｃｕ（Ⅱ）量在０～９μｇ／２５ｍＬ范围内符合比尔定律．用此法测定水样中痕量Ｃｕ（Ⅱ），结果令人满意．
In the acid medium of pH 4.7, Cu (Ⅱ) and 4-(5-chloro-2-pyridylazo) -l, 3-diaminobenzene formed a colored complex which can be quantitatively adsorbed on the strong acid cation exchange exchange. resin. The maximum absorption wevelength is at 500nm the apparent molar absorptivity is 2.8x 10~5L·mol^-1·cm^-1.The Beer's law is obeyed in the range of 0-9μg/25mL for CU(Ⅱ). The proposed method has ho applied to the determination of trace Cu(Ⅱ) in water samples with satisfatory results.
出处
《冶金分析》
CAS
CSCD
北大核心
1999年第2期21-22,12,共3页
Metallurgical Analysis
基金
内蒙古自然科学基金
关键词
树脂相
分光光度法
显色剂
PADAB
铜
测定
Resin-phase
Spectrophotometry
Cu(Ⅱ)
4 -(5-Chloro-2-pyridylazo) - l
3 -diaminobenzene
