SIMULTANEOUS DETERMINATION OF LANTHANUM AND CERIUM IN STEEL BY CHEMOMETRIC-SPECTROPHOTOMETRY
摘 要
在pH 3.0的缓冲溶液中,镧(Ⅲ)、铈(Ⅲ)与偶氮胂-Ⅲ均发生高灵敏度的显色反应,生成稳定的配合物.其λmax均为657 nm,镧(Ⅲ)、铈(Ⅲ)含量在0-1.0 mg·L-1范围内符合比耳定律,两者吸收光谱严重重叠.采用偏最小二乘法和主成分分析法用于普碳钢、铸铁等试样中镧和铈的测定,合成试样分析结果的相对误差小于10%.
Abstract
In a chloroacetate buffer medium of pH 3.0,both La(Ⅲ) and Ce(Ⅲ) ions gave highly sensitive color reactions with arsenazo Ⅲ,having their absorption maxima (λmax 657 nm) seriously overlapped and same linearity range of 0-1.0 mg·L-1.Chemometric methods of principle component analysis (PCA) and partial least squares (PLS) were applied to above mentioned spectrophotometric method and made it possible to determined La(Ⅲ) and Ce(Ⅲ) individually and simultaneously in iron and steel samples.Relative errors of less than 10% were obtained in its application to the analysis of some simulated samples.
中图分类号 O657.32
所属栏目 工作简报
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收稿日期 2005/4/11
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备注朱建芳(1963-),男,辽宁大连人,讲师,硕士,主要从事计算机在分析化学中应用的教学和研究.
引用该论文: ZHU Jian-fang,WANG Li-rong,YU Xie-yu. SIMULTANEOUS DETERMINATION OF LANTHANUM AND CERIUM IN STEEL BY CHEMOMETRIC-SPECTROPHOTOMETRY[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2006, 42(5): 339~341
朱建芳,王莉蓉,余协瑜. 化学计量学分光光度法同时测定钢铁中镧和铈[J]. 理化检验-化学分册, 2006, 42(5): 339~341
被引情况:
【1】柳玉英,周丽, "光度法测定铈的研究进展",理化检验-化学分册 45, 1008-1010(2009)
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参考文献
【1】翟庆洲,任 英.分光光度法同时测定镧和铈[J].分析化学,1990,18(8):737-740.
【2】潘教麦,李在均,张其颖,等.新显色剂及其在光度分析中的应用[M].北京:化学工业出版社,2003.240-243.
【3】M奥托.化学计量学-统计学与计算机在分析化学中的应用[M].北京:科学出版社,2003.167-170.
【2】潘教麦,李在均,张其颖,等.新显色剂及其在光度分析中的应用[M].北京:化学工业出版社,2003.240-243.
【3】M奥托.化学计量学-统计学与计算机在分析化学中的应用[M].北京:科学出版社,2003.167-170.
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