单扫描极谱-偏最小二乘法同时测定丁基锡混合物
Simultaneous Determination of Butyl-Tin Compounds by Single-Sweeping Oscillopolarography with PLS Multivariate Calibration
摘 要
在pH 6.0的乙酸-乙酸钠缓冲液中,三丁基锡、二丁基锡和一丁基锡有各自的极谱峰电流,但彼此之间存在相互干扰,难以同时进行极谱测定.文中运用偏最小二乘的多元校正能力,对三种丁基锡混合物极谱图进行多元校正,获得了较好的定量分析结果.回收率为96.2%~101.2%,相对标准偏差为3.2%~11.9%.
偏最小二乘多元校正法
丁基锡化合物
Single-sweeping oscillopolarography
PLS multivariate calibration
Butytin compounds
Abstract
In an acetate buffer solution of pH 6.0,monobutyltin (MBT) and tributyltin (TBT) gave sensitive polarographic peak currents at -0.70 V and -1.18 V (vs.SCE) respectively,while dibutyltin (DBT) gave 2 sensitive peak current at -0.78 V and -0.88 V.The co-interferences of the 3 compounds made their determinations impossible in their mixtures.By the application of PLS multivariate calibration,the 3 butyltin compounds were successfully determined in the presence of each other,and the simultaneous single-sweeping oscillopolarographic method with the algorithm of PLS multivariate calibration was proposed for the determination in their mixtures.Tests for the precision and recovery of the method were made and the values of RSD′s (n=9) and recoveries obtained were in the ranges of 3.2%-11.9% and 96.2%-101.2% respectively.
中图分类号 O657.31
所属栏目 工作简报
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收稿日期 2006/8/12
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备注李敏(1978-),男,四川人,硕士,主要从事卫生理化检验.
引用该论文: LI Min,ZHANG Ke-rong,ZHENG Bo. Simultaneous Determination of Butyl-Tin Compounds by Single-Sweeping Oscillopolarography with PLS Multivariate Calibration[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2007, 43(10): 827～829
李敏,张克荣,郑波. 单扫描极谱-偏最小二乘法同时测定丁基锡混合物[J]. 理化检验－化学分册, 2007, 43(10): 827～829
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参考文献
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【4】Alan M Bond,Nicholas J Turoczy,Rodney J Carter.The electrochemistry of monobutyltin and mixtures of butyltin compounds at mercury electrodes in aqueous media[J].Anal Chim Acta,1995,310:109-119．
【5】Klaus-Michael Ochsenkühn,Maria Ochsenkühn-Petropoulou,Fotis Tsopelas,et al.Different behavior of organotin compounds by anodic stripping voltammetry and their quantification after partial ion exchange separation[J].Mikrochim Acta,2001,136:129-135．
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