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同时测定铜、镍、锌的非线性偏最小二乘分光光度法
引用本文:王玉枝,张银堂,周毅刚.同时测定铜、镍、锌的非线性偏最小二乘分光光度法[J].分析测试学报,2001,20(1):40-43.
作者姓名:王玉枝  张银堂  周毅刚
作者单位:1. 湖南大学化学化工学院,
2. 湖南医科大学,
摘    要:建立了以1-5-溴-2吡啶偶氮]-2,7-萘二酚(5-Br-PADN)为显色剂,TritonX-100为增溶增敏剂,用非线性偏最小二乘(NLPLS)-分光光度法同时测定Cu^ 、Ni^2 、Zn^2 的方法。用迭代偏最小二乘法(IPLS)选择测定波长,用自编原MATLAB计算机程序进行处理。结果表明,该法不仅克服了三组分之间相互干扰,而且较好地解决了非线性问题,所拟方法用人工样品的分析,准确度较好,结果令人满意。

关 键 词:      偏最小二乘法  分光光度法  同时测定  MATLAB程序
文章编号:1004-4957(2001)01-0040-03
修稿时间:2000年4月23日

Simultaneous Determination of Cu, Ni and Zn by Non-linear PLS Spectrophotometry
WANG Yu-zhi.Simultaneous Determination of Cu, Ni and Zn by Non-linear PLS Spectrophotometry[J].Journal of Instrumental Analysis,2001,20(1):40-43.
Authors:WANG Yu-zhi
Abstract:The optimum conditions of the colour reaction of copper, nickel and zinc with 1 _ (5 _ bromo _ 2 _ pyridyl) _ azo] _ 2,7 _ dihydroxy _ naphthalene(5 _ Br _ PADN) have been established in the presence of the sensitizer/solubilizer Triton X _100. The proposed method can be applied for the simultaneous spectrophotometric determination of these three elements with the aid of nonlinear partial least square technique(NLPLS). The selection of optimal wavelength was achieved by using the iterative partial least square method(IPLS). An algorithm MATLAB compiled by the authors gave satisfactory results for synthetic samples, indicating that the method not only overcomes interference among the three elements, but also solves the nonlinear problem between absorptivity and concentration.
Keywords:Copper  Nickel  Zinc  Partial least square method  Simultaneous determination  Spectrophotometry  MATLAB algorithm
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