摘要
研究了新显色剂5,10,15三(对氯苯基)20丙氧苯基卟啉三乙基溴化铵与铜的显色反应。结果表明:在中性介质中,沸水浴加热10min形成1:1的络合物,λmax=417nm,在0～12μg/10mL范围内吸光度与铜浓度的关系符合比尔定律,表观摩尔吸光系数ε=358×105。该法具有灵敏度高及选择性好的特点,用于水样实际测定,结果满意。
The conditions for color reaction of 5, 10, 15-tris (4-chlorophenyl)-20-(4-propyleneoxyphenyl) porphyrin triethyl ammonium bromide (TCPPTAB) with copper(Ⅱ) have been studied. The results show that in the solution of pH7, the complex ratio is 1:1, the temperature of color reaction is 100℃ and time is 10 min. Its apparent molar absorptivity is 3 58×10 5L·mol -1 ·cm -1 at 417nm Beer's law is obeyed in the range of 0-1 2μg/10mL for Cu(Ⅱ). The method has high sensitivity and good selectivity. The proposed method has been applied to the spectrophotometric determination of trace copper in the water with satisfactory results.
出处
《冶金分析》
CAS
CSCD
北大核心
2000年第1期8-10,共3页
Metallurgical Analysis
基金
河北省自然科学基金
关键词
铜
分光光度法
溴化铵
显色剂
显色反应
Copper
Spectrophotometry
5, 10, 15-Tris(4-chloropyenyl)-20-(4-propyleneoxyphenyl) porphyrin triethyl ammonium bromide
