高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (3): 387.

• 论文 • 上一篇    下一篇

探讨二元颗粒混合物取样误差的新的数学模型

高志, 何锡文, 张贵珠   

  1. 南开大学化学系, 天津 300071
  • 收稿日期:1998-05-28 出版日期:1999-03-24 发布日期:1999-03-24
  • 通讯作者: 何锡文
  • 作者简介:高志,男,33岁,博士生,高级工程师.
  • 基金资助:

    国家自然科学基金(批准号:29575200)资助课题

A New Mathematical Model for Investigating the Sampling Errors of Twocomponent Particulate Mixtures

GAO Zhi, HE Xi-Wen, ZHANG Gui-Zhu   

  1. Department of Chemistry, Nankai University, Tianjin, 300071
  • Received:1998-05-28 Online:1999-03-24 Published:1999-03-24

摘要: 采用新的数学模型研究二元颗粒混合物的取样误差,首次提出了取样的逻辑质量单元的理论,探讨了逻辑质量单元的物理意义,建立了按质量取样的标准偏差的计算公式.应用颗粒药品二元混合物的取样实验,证实了该公式的正确性.

关键词: 二元颗粒混合物, 取样误差, 数学模型, 逻辑质量单元

Abstract: Anew mathematical model was established for investigating the sampling of twocomponent particulate mixtures by mass. By the introduction of a new concept named as logical unit of sampling by mass, equations of estimating the standard deviation and relative standard deviation of sampling by mass were presented. The physical meaning of the logical unit of sampling by mass was also studied. These equations were verified by the sampling for chemical analysis of twocomponent medicine tablets. This theory is generally applicable so as to enrich the sampling theory of analytical chemistry and direct the sampling practices.

Key words: Twocomponent particulate mixture, Sampling error, Mathematical model, Logical unit of sampling by mass

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