| 铜含量测定方法研究 |
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| 引用本文： | 白利涛,张丽萍,林红,赵国文,冯鹏.铜含量测定方法研究[J].应用化工,2011,40(5). |
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| 作者姓名： | 白利涛 张丽萍 林红 赵国文 冯鹏 |
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| 作者单位： | 1. 四川理工学院材料与化学工程学院,四川自贡,643000
2. 成都市产品质量监督检验院,四川成都,610100 |
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| 摘 要： | 建立二乙基二硫代氨基甲酸钠(DDTC或铜试剂)光度法测定铜含量的方法。实验结果表明,在pH值4～5的条件下,Cu-DDTC配合物的最大吸收波长为460 nm,摩尔吸光系数为1.0×104L/(mol.cm),线性范围为0～2.4μg/mL,加标回收率为94.9%～104.1%,RSD为3.1%～5.7%。该方法可用于样品中常量铜的测定,并且大量的银存在时也不干扰铜的测定。经用于银包铜粉样品中铜含量的测定,结果符合要求。
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| 关 键 词： | 银包铜 铜 DDTC钠盐 分光光度法 |
Study on the determination method of the content of copper |
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| BAI Li-tao,ZHANG Li-ping,LIN Hong,ZHAO Guo-wen,FENG Peng.Study on the determination method of the content of copper[J].Applied chemical industry,2011,40(5). |
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| Authors: | BAI Li-tao ZHANG Li-ping LIN Hong ZHAO Guo-wen FENG Peng |
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| Affiliation: | BAI Li-tao1,ZHANG Li-ping1,LIN Hong2,ZHAO Guo-wen1,FENG Peng1(1.Department of Materials and Chemical Engineering,Sichuan Institute of Science and Technology,Zigong 643000,China,2.Chengdu Product Quality Supervision and Inspection Institute,Chengdu 610100,China) |
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| Abstract: | A method to determine the content of copper by spectrophotometry with sodium diethyldithiocarbamate was established.The results indicated that under the medium of pH 4～5,the maximum absorption wavelength of the Cu(Ⅱ) and DDTC micellar complex is at 460 nm,the apparent molar absorptivity coefficient is 1.0×104 L/(mol·cm).The Beer's law is obeyed in the range of 0～2.4 μg/mL.The recovery is 94.9%～104.1%,with relative standard deviation is 3.1%～5.7%.It is an excellent method to determine constant copper at acidic conditions as well as exclute the interference of a large number of silver by choosing the appropriate conditions.The proposed method has been applied in determination of copper in sample of silver coated copper powder with satisfactory results. |
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| Keywords: | silver coated copper powder Cu(Ⅱ) DDTC spectrophotometry |
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