高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (3): 359.

• 论文 • 上一篇    下一篇

主成分回归-络合滴定法测定混合金属离子

倪永年, 吴英亮, 金玲   

  1. 南昌大学化学系, 南昌, 330047
  • 收稿日期:1997-02-05 出版日期:1998-03-24 发布日期:1998-03-24
  • 通讯作者: 倪永年,男,51岁,教授.
  • 作者简介:倪永年,男,51岁,教授.
  • 基金资助:

    国家自然科学基金及江西省自然科学基金资助课题.

Simultaneous Determination of Mixed Metal Ions by Complexometric Titration and Principal Component Regression

NI Yong-Nian, WU Ying-Liang, JIN Ling   

  1. Department of Chemistry, Nanchang University, Nanchang, 330047
  • Received:1997-02-05 Online:1998-03-24 Published:1998-03-24

摘要: 提出了用络合滴定法测定混合金属离子.以汞膜电极为指示电极,银-氯化银电极为参比电极,以标准EDTA溶液滴定混合金属离子溶液.采集-系列指定电位点处滴定剂的体积,并以主成分回归法处理滴定数据.利用本文方法对铜、锌、铅、钻混合溶液进行了测定,结果满意.

关键词: 络合滴定, 金属离子, 汞膜电极, 主成分分析

Abstract: Anew method of complexometric titration for determination of mixed metal ions with principal component regression(PCR) was developed. The principle of this method was described and the linear complexometric titration equation was derived. In this work, a mercury film electrode(MFE) was used as the indicator electrode for potentiometric measurements, and a double junction Ag/AgCl electrode as the reference electrode. The mixtures of metal ions were titrated with ethylenediamine teraacetic acid(EDTA), the potentiometric titration data were recorded at each selected potential points and were then treated by chemometric approach of PCR. A set of synthetic mixtures of lead, copper, zinc and cobalt with concentration levels from 0.5 mmol/Lto 1.5 mmol/Lwere analyzed by the proposed method and acceptable results were obtained.

Key words: Complexometric titration, Metal ions, Mercury film electrode, Principal component regression

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