为配合做好’99全国第三次碘缺乏病监测工作 ,中国地方病防治研究中心制备发放了盐碘外质控样品 ,曾于 1999年 3月～ 5月对省级监测实验室检测质量进行了两轮评定 ,本文报导并分析各省盐碘外质控样品测定结果。1　材料与方法1 1　盐碘外质控样品的制备　按国家有关标准物质研制 In order to cooperate well with the third monitoring of iodine deficiency disorders in the whole nation, the Chinese Center for Prevention and Control of Endemic Diseases prepared and distributed quality control samples of iodine and iodine. In March-May 1999, the quality of the monitoring laboratories at the provincial level was examined Two rounds of assessment, this paper reports and analysis of the provinces outside the salt iodine quality control sample measurement results. 1 Materials and methods 1 1 salt iodine preparation of quality control samples developed according to the relevant national standards