2014年全国碘缺乏病实验室水碘检测能力评价

Report of national proficiency testing for water iodine among the laboratories of iodine deficiency disorders in 2014

目的考核全国各省和地市级碘缺乏病实验室的水碘检测能力,了解各级实验室检测的整体水平以及各实验室间的差异。方法将各实验室的检测结果与水中碘成分分析国家一级标准物质的参考值±不确定度进行比较,评价其检测能力。结果参加质控考核的32个省级水碘实验室全部反馈了结果且全部考核合格;347个地市级水碘实验室的反馈率为98.6%,合格率为96.5%;14个县级水碘实验室反馈了结果且全部考核合格。结论全国省级实验室的检测结果非常接近,实验室内和实验室间变异很小,检测精密度和准确度均保持在较高的水平;绝大部分地市级实验室具备水碘检测能力,建议未通过考核的实验室查找原因,提高检测水平。

Objective To evaluate the testing ability for water iodine of labs which take part in the external independent quality Assurance Programs for IDD labs across China,and to understand the difference of the testing ability of water iodine among all of the laboratory. Methods To compare the testing results of all the laboratory with the value ± uncertainty of certified reference material for iodine in water,and then evaluate their testing capacity. Results All of the 32 provincial participatory labs had fed back their testing results,and all of them were qualified. At the prefecture level,the feedback rate was 98. 6%,and qualified rate was 96. 5%. 14 county labs and Tianjin Medical University had fed back their testing results,and all of them were qualified.Conclusions The results of the provincial labs are quite close,and the variations inside each lab and inter-lab are small. In addition,the accuracy and precision are maintained at a high level. Most of the prefecture labs had the ability of water iodine testing. It is suggested that the unqualified labs analyze the problems and find solutions.