1987年7～8月对大连市区生活水平中等,外观健康的7～12岁小学生共888名(其中男461人,女427人)进行发锌检测,取枕后部贴近皮肤2～4cm长头发约1g,用日立170—50A型乙炔火焰原子吸收仪进行测定,并用发锌值<110ppm标准判断缺锌,同时,调查询问1～2年级儿童的饮食习惯和锌缺乏症的有关症状,并给予含1％ZnSO_4的 From July to August 1987, a total of 888 pupils (461 males and 427 females) aged 7-12 years with moderate and healthy living standards in Dalian city were tested for zinc, and the rear of the pillow was placed close to the skin for 2-4 cm Hair about 1g, with Hitachi 170-50A acetylene flame atomic absorption spectrometry and hair zinc value of <110ppm standard to determine zinc deficiency, at the same time, inquiries about 1 to 2 children’s diet and zinc deficiency symptoms, and Given 1% ZnSO 4