Abstract：The long-term stability of inductively coupled plasma mass spectrometer (ICP-MS) for the determination of Sn, Sb, Pb and Bi was measured by the repeatability and reproducibility precision within laboratory as well as χ2 statistic according to standard GB/T 32548-2016. The certified reference materials of microalloyed steel and high temperature alloy with two matrixes were used for tests. The results showed that the long-term stability of ICP-MS was not the same during the determination of various elements in different matrix samples. Under experimental conditions, the statistical parameters such as precision, trueness and repeatability within periods, overall precision among periods and the trueness of general mean could meet the detection standards and statistical requirements for 11.5h continuous measurement of Sn, Sb and Bi and 6.0h continuous measurement of Pb. Therefore, the upper limit of long-term stability of ICP-MS under experimental conditions was 6.0h for Pb. When Pb was not measured, the upper limit could be extended to 11.5h. Within the upper limit of long-term stability, the measurement and correction of calibration curve was not necessary for the instrument, which saved time and cost
ASTM E2823-17 Standard test method for analysis of nickel alloys by inductively coupled plasma mass spectrometry (Performance-Based)[S].ASTM International,2017.
贾云海,孙晓飞,袁良经.分析仪器长期稳定性表征方法研究[J].冶金分析,2019,39(1):1-8.JIA Yun-hai,SUN Xiao-fei,YUAN Liang-jing.Research on the characterization of long-term stability for analytical instrument[J].Metallurgical Analysis,2019,39(1):1-6.
[7]
孙晓飞,蔺菲,贾云海.碳硫分析仪长期稳定性测量方法研究[J].冶金分析,2019,39(2):1-7.SUN Xiao-fei,LIN Fei,JIA Yun-hai.Study on the measurement method of long-term stability for carbon-sulfur analyzer[J].Metallurgical analysis,2019,39(2):1-7.
[8]
ISO/TR 21074:2016(E) Application of ISO5725 for the determination of repeatability and reproducibility of precision tests performed in standardization work for chemical analysis of steel[S].International Organization for Standardization,2016.
[9]
ASTM E1601-12 Standard practice for conducting an inter-laboratory study to evaluate the performance of an analytical method[S].ASTM international,2012.
