| CTMAB有机溶剂增敏光度法测定核桃中微量铜 |
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| 引用本文： | 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(1):65-67. |
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| 作者姓名： | 陈荷莲 张晓慧 |
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| 作者单位： | 江汉大学化学与环境工程学院,湖北武汉430056 |
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| 摘 要： | 呈酸性并溶有乙醇的介质中,铜(Ⅱ)、PAN和十六烷基三甲基溴化铵(CTMAB)形成稳定的多元胶束络合物,其最大吸收波长为520 nm。铜(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(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。
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| 关 键 词： | 铜(Ⅱ) 有机溶剂 CTMAB 增敏 分光光度法 |
Determination of Trace of Copper in Walnut by CTMAB and Organic Solvent Sensitivity Spectrophotometry |
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| 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 Sciences,2012(1):65-67. |
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| Authors: | CHEN He-lian ZHANG Xiao-Hui |
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| Institution: | (School of Chemistry and Environmental Engineering,Jianghan University,Wuhan 430056,Hubei,China) |
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| Abstract: | In acid medium with ethanol,copper（Ⅱ）、 PAN and cetyl trimethyl ammonium bromide（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（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. |
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| Keywords: | copper（Ⅱ） organic solvent CTMAB sensitized spectrophotometry |
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