大学化学 >> 2022, Vol. 37 >> Issue (12): 2111012.doi: 10.3866/PKU.DXHX202111012

师生笔谈 上一篇    下一篇

分析化学中的选择性及提高选择性策略的探讨

师亮1, 漆红兰2, 张璐3, 张成孝2,*()   

  1. 1 西安工业大学电子信息工程学院, 西安 710021
    2 陕西师范大学化学化工学院, 西安 710062
    3 西安海关技术中心, 西安 710068
  • 收稿日期:2021-11-03 录用日期:2022-02-22 发布日期:2022-03-17
  • 通讯作者: 张成孝 E-mail:cxzhang@snnu.edu.cn
  • 作者简介:张成孝, Email: cxzhang@snnu.edu.cn
  • 基金资助:
    海关总署科技计划(2021HK209);国家自然科学基金(21974081);国家自然科学基金(22074087);2017陕西师范大学名师工作室项目

Discussion on the Definition and Improving Strategies of Selectivity in Analytical Chemistry

Liang Shi1, Honglan Qi2, Lu Zhang3, Chengxiao Zhang2,*()   

  1. 1 School of Electronic Information Engineering, Xi'an Technological University, Xi'an 710021, China
    2 School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
    3 Technology Centre of Xi'an Customs District P. R. China, Xi'an 710068, China
  • Received:2021-11-03 Accepted:2022-02-22 Published:2022-03-17
  • Contact: Chengxiao Zhang E-mail:cxzhang@snnu.edu.cn

摘要:

选择性是评价分析方法的一个重要指标。国际纯粹与应用化学联合会(IUPAC)对选择性给出了明确的推荐定义。但是,选择性的定义和定量表述仍然是悬而未解的问题。本文讨论了选择性的内在特征(定义)、干扰的类型和量化表达式,总结了提高选择性的一些策略。

关键词: 选择性, 干扰物, 选择性系数, 化学测量

Abstract:

The selectivity is one basic parameter for evaluating analytical method. The International Union of Pure and Applied Chemistry (IUPAC) clearly recommends that the selectivity refers to the extent to which the method can be used to determine particular analytes in mixtures or matrices without interferences from other components of similar behavior. However, its definition and quantitation have still remained open questions. Here, the selectivity on the intrinsic characteristics (definitions), the types of interferences, and the estimation of sensitivity are discussed. Some strategies to improve the selectivity are summarized.

Key words: Selectivity, Interferences, Selectivity coefficient, Chemical measurement