摘要目的 了解碘盐新标准实施6个月后,江苏省苏北地区8～10岁儿童碘营养现状,为合理使用碘盐预防碘缺乏病提供依据.方法 根据苏北地区水碘分布情况,将其分为低、中、高水碘(水碘含量分别为＜10、10～150、＞150 μg/L)3个地区,每个地区抽取2个乡镇,每个乡镇抽取1所小学,每所小学抽取8～10岁学生120人,采集尿样及其家中食用盐盐样;所在乡镇采集生活饮用水水样.采用砷铈催化分光光度法检测尿碘含量;直接滴定法检测盐碘含量;硫酸铈催化分光光度法检测水碘含量.结果 低、中、高水碘地区分别检测8～10岁儿童尿样240、242、242份,尿碘中位数分别为13549、183.62、448.99μg/L,组间比较差异有统计学意义(x2=165.56,P＜0.05);低、中、高水碘地区分别检测居民户盐样100、131、117份,盐碘中位数分别为21.88、22.01、＜5 mg/kg;低、中、高水碘地区分别检测水样12、14、10份,水碘中位数分别是8.89、38.52、189.25 μg./L,组间比较差异有统计学意义(x2=22.27,P＜0.05).结论 苏北低、中水碘地区8～10岁学龄儿童碘营养状况良好,碘盐新标准能满足该地区儿童碘营养的需要,但高水碘地区儿童碘营养过量,应减少碘的摄入.

abstractsObjective To investigate and analyze the iodine nutritional status of school-age children six months after implementation of a new standard of iodized salts in northern area of Jiangsu Province,and to provide a basis for control of iodine deficiency disorders.Methods According to the water iodine content,northern area of Jiangsu Province was divided into low,moderate and high iodine areas (the water iodine contents were ＜ 10,l0-150 and ＞ 150 μg/L,respectively).Two towns were selected in each area; one elementary school was selected in each town; and 120 children aged 8-10 were selected in each school.The samples of urine,household salt,and water in each town were collected.Urinary iodine content was tested by arsenic cerium catalytic spectrophotometry;iodine content of household salt sample was determined by direct titration; iodine content of water sample was tested by cerium sulfate catalytic spectrophotometry.Results In low,moderate and high water iodine areas,240,242 and 242 urine samples of 8-10 years old children were tested; urinary iodine median was 135.49,183.62 and 448.99 μg/L,respectively,and the difference between groups was statistically significant (x2 =165.56,P ＜ 0.05).In low,moderate and high water iodine areas,100,131 and 117 household salt samples were tested,and the median of salt iodine was 21.88,22.01 and ＜ 5 mg/kg,respectively.Water samples collected in low,moderate and high iodine areas were 12,14 and 10 copies,respectively,and the median of water iodine was 8.89,38.52 and 189.25 μg/L,respectively,and the difference between groups was statistically significant (x2 =22.27,P ＜ 0.05).Conclusions The iodine nutritional condition of 8-10 years old children in low,moderate water iodine areas in northern area of Jiangsu Province is appropriate.The new standard is suitable for iodine nutritional needs in the area.The iodine nutritional condition in high water iodine area is excess,iodine intake should be reduced.