痕量分析实验室内质量保证的系统分析

本文用系统分析研究痕量分析的室内质量保证。1.给出系统的结构设计,提出 QA 系统由质量传递、QA 措施、QC 措施和室间性能研究4个子系统所组成。系统设计的理论依据是痕量分析的误差分布论,目标是分析数据的五性,即准确性、精密性、代表性、可比性和完整性;任务是把分析误差控制在给定的不确定度水平;手段是五性的表征指标;约束条件是QA 措施。2.误差分析;质量传递是非连续的随机过程,是个灰色系统。而各类误差又具有模糊性,恰能证明系统的灰色性质。3.建立灰色模型:总误差 R=△a+bx,△a是加和性误差,b 是乘积性误差。△a0,b=常数1是灰色模型的分级优化解。4.给出评价 QA 系统标准:±不确定度。

SYSTEM ANALYSIS OF QUALITY ASSURANCE FOR TRACE ANALYSIS IN THE LABORATORY

Quality assurance (QA) for trace analysis in the laboratory was studies by system analysis.1.A structure of the systems was proposed.There were 4 subsystems in it:mass transfer,QA measures,quality control QC me- asures and performance research among different laboratories.The stucture was on the basis of the theory of error distribution.The target of QA system were accuracy,precision,representation,comparison and perfection.The system tack is to control the analytical error at given level with a undetermine...