CTMAB有机溶剂增敏光度法测定核桃中微量铜

江汉大学学报（自然科学版） ›› 2012, Vol. 40 ›› Issue (1): 65-67.

CTMAB有机溶剂增敏光度法测定核桃中微量铜

陈荷莲，张晓慧

江汉大学化学与环境工程学院，湖北武汉430056

出版日期:2012-02-20 发布日期:2013-11-07
作者简介:陈荷莲单位1968—)，女，讲师，硕士，研究方向:天然合成有机分子。

Determination of Trace of Copper in Walnut by CTMAB and Organic Solvent Sensitivity Spectrophotometry

CHEN He－lian,ZHANG Xiao－Hui

School of Chemistry and Environmental Engineering,Jianghan University,Wuhan 430056,Hubei,China

Online:2012-02-20 Published:2013-11-07

摘要/Abstract

摘要： 呈酸性并溶有乙醇的介质中，铜单位Ⅱ)、PAN和十六烷基三甲基溴化铵单位CTMAB)形成稳定的多元胶束络合物，其最大吸收波长为520nm。铜单位Ⅱ)浓度在2.0～60.0μg／L范围内符合比尔定律，回归方程为y＝0.0059x＋0.0048，相关系数r＝0.9982，其摩尔吸光系数ε＝2.0×104L／mol·cm。相对标准偏差单位RSD)小于2.50％。用此法测定食品中微量铜，所得结果与火焰原子吸收分光光度法相符。

关键词: 铜单位Ⅱ), 有机溶剂, CTMAB, 增敏, 分光光度法

Abstract: In acid medium with ethanol, copper单位 Ⅱ)、 PAN and cetyl trimethyl ammonium bromide单位 CTMAB) could form a stable multi－micelle complex with the maximum absorption wave length at 520 nm. Lambert－Beer law was well obeyed for the copper单位 Ⅱ) concentration in ranging of 2.0~60.0 μg／L. Regression equation was y＝0.0059x＋0.0048, which with correlation coefficient r=0.9982 and the apparent molar absorptivity ε=2.0×104 L／mol／cm. The relative standard deviation was less than 2.50％. The proposed method was used in the determination of trace copper in food, and the results were in consistent with the results obtained by flame atomic absorption spectrometry.

Key words: copper单位 Ⅱ), organic solvent, CTMAB, sensitized, spectrophotometry

中图分类号:

O657.3

陈荷莲，张晓慧. CTMAB有机溶剂增敏光度法测定核桃中微量铜[J]. 江汉大学学报（自然科学版）, 2012, 40(1): 65-67.

CHEN He－lian,ZHANG Xiao－Hui. Determination of Trace of Copper in Walnut by CTMAB and Organic Solvent Sensitivity Spectrophotometry[J]. Journal of Jianghan University(Natural Science Edition), 2012, 40(1): 65-67.

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