1996年第二季度，内蒙古自治区卫生厅、教育厅、工商管理局、技术监督局、商务厅、盐务管理局，按照中央六部、委、局联合下发的“关于开展第三届防治碘缺乏病日活动的通知”精神，对内蒙古部分地区的食用加碘盐进行了监督抽查。抽查结果，单样合格率仅为53．3％。一、样品来源 In the second quarter of 1996, the Ministry of Health of the Inner Mongolia Autonomous Region, the Ministry of Education, the Administration for Industry and Commerce, the Technical Supervision Bureau, the Department of Commerce, and the Bureau of Salt Administration issued the “Regarding the Third Prevention of Iodine Deficiency” issued by the six Central Committees, Committees, and Bureaus of the Central Government. In the spirit of the notice of the sick day’s activities, supervision and spot checks were carried out on iodized salt in some parts of Inner Mongolia. Spot check results, single sample pass rate was only 53.3%. First, the source of the sample