辉光放电质谱仪校准方法  

Calibration method and uncertainty analysis of glow discharge mass spectrometry

作　　者：汤云腾 TANG Yunteng(Xiamen Institute of Rare Earth Materials,Haixi Institutes,Chinese Academy of Sciences,Xiamen 361021,China)

机构地区：[1]中国科学院海西研究院厦门稀土材料研究中心,福建厦门361021

出　　处：《化学分析计量》2023年第1期69-72,共4页Chemical Analysis And Meterage

摘　　要：研究了辉光放电质谱仪(GDMS)的校准方法,评定了校准结果不确定度。用纯铜和合金钢标准样品在优化条件下对辉光放电质谱仪的灵敏度、稳定性、分辨率、检出限、示值误差和重复性等计量指标进行校准,验证仪器的可靠性。运用标准曲线方法定量分析合金钢标准样品中铜、钼、钨3钟元素,计算得铜、钼、钨3钟元素测量值的相对扩展不确定度分别为8%、6%、9%。根据不确定度来源和各不确定度分量结果,可知相对灵敏度因子(F)带来的不确定度显著高于其它不确定度,其对GDMS定量分析的准确性产生较大影响。A calibration method of glow discharge mass spectrometry(GDMS)was studied and the uncertainty of calibration results was analyzed.Under the optimum conditions,measurement indexes such as sensitivity,stability,resolution,detection limit,indication error and repeatability were calibrated with pure copper and alloy steel standard samples to verify the reliability of the instrument.The three elements of Cu,Mo and W in alloy steel were quantitative measured by standard curve method.The sources of uncertainty were analyzed and the uncertainties of components and the expanded uncertainties were calculated,and the relative expanded uncertainties of Cu,Mo and W were 8%,6%and 9%respectively.According to the sources of uncertainty and the results of each uncertainty component,it can be seen that the uncertainty brought by the relative sensitivity factor(F)is significantly higher than other uncertainties,which has a great impact on the accuracy of the quantitative analysis of GDMS.

关 键 词：计量学 辉光放电质谱仪 校准方法 不确定度 

分 类 号：O657.63[理学—分析化学]