大米中重金属镉、总砷和铜含量能力验证设计与质量控制——以2015年实验室间比对验证为例

Capacity Verification and Quality Control of Heavy Metal Measurement(Cadmium,Total Arsenic and Copper) in Rice:Taking Interlaboratory Analytical Result Comparison in 2015 for Example

能力验证是利用实验室间比对活动来确定和区分实验室的检测和测量能力。2015年29家检测机构参加实验室大米重金属检测能验证,实验结果采用"Z比分法"分析,结果显示参加此次比对试验的实验室检测能力较高,Z值分布基本均衡,但部分实验室镉和铜的检测能力有待于提高。

Ability validation is to use the comparison activity to identify and distinguish between laboratory testing and measuring ability.In 2015 ,rice detection of heavy metals testing to participate in the laboratory of 29 institutions were carried out,the results using ＂Z score method＂ analysis.The results showed at the higher of the ability to test, the Z value distribution was fundamental equilibrium, some laboratory ability of detecting cadmium and copper remains to be improved.