应用6σ质量管理方法尝试评价多目标样品氯等项目检测质量水平

Trial Application of 6σ Quality Management Method to Evaluate the Quality Level of Detection Items of Multiple-target Geochemical Samples

应用6σ质量管理方法评价X射线荧光光谱法测定多目标地球化学样品分析中4个日常监控土壤标准物质中C l、S、总碳、N、Na2O、MgO、A l2O3、SiO2、P、K2O、CaO、Ba、Ti、V、Cr、Mn、TFe2O3、Zn、Ga、Br、Pb、Th、Rb、Sr、Y、Zr、Nb等27个项目检测质量水平。研究结果显示,随着高精度、自动化仪器的应用,多目标样品分析多个项目的精密度、准确度都得到大幅度的提高,部分检测项目的性能已经达到6σ质量水平;但有少数项目如N、总碳、Cr等低于3σ质量水平,其精密度准确度均需改进,分析性能有待进一步提高,建议更换检测方法。用6σ质量管理方法评价地质实验分析测试质量水平与地质实验室传统质量控制方法得出的结果具有一致性,其评价方法简便、量化、直观、具有一定的应用价值。

It is the first attempt to apply six sigma（6σ） quality managment method to evaluate the X-ray fluorescence spectrometry detection method for four multi-objective reference substance of soil,which include 27 targets such as Cl,S,total carbon,N,Na2O,MgO,Al2O3,SiO2,P,K2O,CaO,Ba,Ti,V,Cr,Mn,TFe2O3,Zn,Ga,Br,Pb,Th,Rb,Sr,Y,Zr,Nb.The research result shows that the precision and accuracy of multi-objective analysis with multiple target samples have been improved along with high precision and automatic equipment applications.Some of the items have reached 6σ quality level.But there are a few targets such as N,Total carbon and Cr were lower than 3σ quality level and their precision and accuracy are required to be improved,therefore,recommend to change detection method.Evaluations of geological analysis with 6σ quality management methods are consistent with traditional quality control methods.The evaluation method is simple,quantitative and intuitive with certain practical value.