Proficiency Testing for Determination of Water Content in Toluene of Chemical Reagents by iteration robust statistic technique

International Conference on Smart Engineering Materials 2018

Wang, Hao^1 ; Wang, Qunwei^1 ; He, Ming^2

Ningbo Entry-Exit Inspection and Quarantine Bureau, Zhejiang, China^1

Zhoushan Entry-Exit Inspection and Quarantine Bureau, Zhejiang, China^2

关键词: Chemical reagents;    Detection technology;    Implementation process;    Liquid chemicals;    Proficiency testing;    Proficiency testing program;    Robust statistics;    Sample preparation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/362/1/012023/pdf
DOI  :  10.1088/1757-899X/362/1/012023

来源: IOP

【 摘 要 】

In order to investigate and improve the level of detection technology of water content in liquid chemical reagents of domestic laboratories, proficiency testing provider PT0031 (CNAS) has organized proficiency testing program of water content in toluene, 48 laboratories from 18 provinces/cities/municipals took part in the PT. This paper introduces the implementation process of proficiency testing for determination of water content in toluene, including sample preparation, homogeneity and stability test, the results of statistics of iteration robust statistic technique and analysis, summarized and analyzed those of the different test standards which are widely used in the laboratories, put forward the technological suggestions for the improvement of the test quality of water content. Satisfactory results were obtained by 43 laboratories, amounting to 89.6% of the total participating laboratories.