CHEN Shengli, CHEN Sheng, SUN Wei, ZHAO Xiangdong

(College of Chemical Engineering and Environment, China University of Petroleum(Beijing), Beijing 102249, China)

Abstract: The measurement resolution of particle size is one of the most important performance indexes of particle size analyzer. However, there is no standard materials that can be used for particle size distribution in China to evaluate the resolution of particle size analyzer. In this work, a standard material with multi-peak particle size distributions with a size range of 20～110 μm was prepared through quantitatively mixing three particle fractions of relatively uniform particle size distribution. The particle size distribution of the three particle fractions was separately measured by using optical microscope, and the value can be traced to the wavelength of He-Ne laser. The particle size distribution of the standard material was calculated based on the particle size distribution and mixing ratio of the three particle fractions. The standard material has been recently approved by China State Administration for Market Regulation, with the catalogue code of GBW12053. By using the standard material with multi-peak particle size distribution, the resolution of the laser scattering particle size analyzers of main manufacturers of China and of the Malvern Instruments Limited (UK) was evaluated. It was found that the resolution of particle size analyzers from most manufacturers in China reaches that of Malvern MS2000, and some particle size analyzers’ resolution is close to or reaches that of Malvern MS3000.

Keywords: standard materials; particle size distribution; multiple-peaks distribution; resolution of particle size analyzer

中图分类号：TQ577.7+7

文献标志码：A

文章编号：1008-5548(2021)03-0050-10

DOI:10.13732/j.issn.1008-5548.2021.03.007

收稿日期： 2020-11-03，修回日期：2020-11-24，在线出版时间：2021-04-08 10:42。

基金项目：国家自然科学基金重大项目，编号：91534120。

第一作者简介：陈胜利(1962—)，男，博士，教授，博士生导师，研究方向为新材料，催化剂及催化反应工程、 烃加工、 标准化。E-mail：shenglichen62@163.com; slchen@cup.edu.cn。