南阳师范学院学报2017，Vol.16Issue(3)：18-21,4.
浊点萃取-分光光度法测定水中的痕量铜
Determination of trace copper by spectrophotometry with cloud-point extraction
李会玲 1吴学敏 1包晓玉1
作者信息
- 1. 南阳师范学院 化学与制药工程学院,河南 南阳 473061
- 折叠
摘要
Abstract
The cloud point method was proposed to extract and preconcentrate Cu(Ⅱ) in the river water.The analyte Cu(Ⅱ) is complexed with 5-Br-PADAP {2-(5-bromo-2-py ridy lazo)-5-diethy laminopheno l}.Triton X-114 is added as a surfactant.At pH 7.0 phosphoric acid buffer solution, the maximum wavelength of absorption of the complex is 560 nm, ε=2.7×105 L·mol-1·cm-1, the linear range of Cu(Ⅱ) is 0.01~0.35 μg/mL, the relative standard deviations(RSD) is 3.5 % and the standard addition recovery is between 95%~102%.The method can be applied to the determination of trace copper in water sample with satisfactory results.关键词
Cu(Ⅱ)/浊点萃取/分光光度法/2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚Key words
Cu(Ⅱ)/cloud point extraction/spectrophotometric method/2-(5-bromo-2-pyridylazo)-5-diethylaminophenol分类
化学化工引用本文复制引用
李会玲,吴学敏,包晓玉..浊点萃取-分光光度法测定水中的痕量铜[J].南阳师范学院学报,2017,16(3):18-21,4.
