Discussion on common determination methods of conventional element in stainless steel and their influence on proficiency testing results
SUN Bi-yao1, WANG Peng*2, TANG Ling-tian3, FENG Hao-zhou1, CAI Wen-yi1
1. Central Iron & Steel Research Institute, Beijing 100081, China; 2. NCS Testing Technology Co., Ltd., Beijing 100081, China; 3. China NIL Research Center for Proficiency Testing, Beijing 100081, China
Abstract：Three common determination methods for chemical composition of conventional elements (such as silicon and manganese) in stainless steel were studied: including classical wet chemical analysis, spark discharge atomic emission spectrometry (Spark-AES) and inductively coupled plasma atomic emission spectrometry (ICP-AES). Based on the proficiency testing data, standards and literatures in 2008-2018, the characteristics and applicability were briefly analyzed. The results showed that for the chemical composition (such as silicon and manganese) determination in stainless steel, the determination ranges of three elements were not same in standards. The classical wet chemical analysis method was mature and stable with high precision. It was rarely used in proficiency testing due to the complicated operation, but the satisfaction rate was high, and it was published in China National Knowledge Infrastructure (CNKI) database first. Spark discharge atomic emission spectrometry (Spark-AES) had simple operation and good reproducibility. It was widely used in proficiency testing and the satisfaction rate was high. There were many reports in CNKI database. The application characteristics of ICP-AES were between the other two methods. The application in proficiency testing was few and the satisfaction rate was low. It was published in CNKI database at the latest.
孙璧瑶, 王蓬, 唐凌天, 冯浩洲, 蔡文毅. 不锈钢中常规元素常用测定方法比较及对能力验证结果的影响[J]. 冶金分析, 2020, 40(11): 56-62.
SUN Bi-yao, WANG Peng, TANG Ling-tian, FENG Hao-zhou, CAI Wen-yi. Discussion on common determination methods of conventional element in stainless steel and their influence on proficiency testing results. , 2020, 40(11): 56-62.
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