土壤中重金属元素测试能力验证结果探讨

Evaluation on the Analytical Results of Metal Element in Soil in the Proficiency Testing Program

对原四川省质量技术监督局2017年能力验证计划“土壤中重金属总铬、镉测试”结果进行统计、分析。采用国际通用的稳健统计法,根据Z比分数评判各实验室的测试结果,反映参加实验室的测试能力和水平,分析存在的质量技术问题,提升我省实验室土壤重金属测试质量供给水平。

Analytical data for heavy metal element of Cr and Cd in soil samples in Proficiency Testing( PT) Program held by Sichuan Administration of Quality and Technical Supervision were studied. Robust statistics,a convenient and international and regionally accepted statistical method and Z - scores are used for evaluating the testing results. The evaluation result reflects objectively the testing ability and technical levels of each laboratory. The purpose of this PT is analyzing existing technical quality problems,Improving the testing quality level of heavy metal in soil.