石家庄市碘盐质量与重点人群尿碘水平调查结果

目的 了解石家庄市实行全民食盐加碘防治碘缺乏病后碘盐质量与8～10儿童、育龄妇女尿碘状况.方法 2004-2008年,在石家庄市对碘盐生产企业,每月对每批生产的碘盐按东、南、西、北、中(1份)5个方位抽检盐样9份;在石家庄市的23个县(区),抽取210个行政村(居委会),每个行政村(居委会)再抽取8户居民,采集家中盐样;抽取4名育龄妇女,采集尿样.2004-2008年共抽取160所小学,每所小学抽取8～10岁学生20名,采集尿样.盐碘测定采用直接滴定法,尿碘测定采用过硫酸铵消化-砷铈催化分光光度法.结果 2004-2008年,石家庄市生产企业盐碘合格率均＞99%;居民碘盐覆盖率均＞95%,非碘盐率＜5%;碘盐合格率除2004年为87.10%外,其余年份均＞90%;合格碘盐食用率除2004年(83.08%)未达到国家碘缺乏病消除标准(90%)外,其余年份均＞90%.8～10岁儿童和育龄妇女尿碘中位数均＞100μg/L,且＜50μg/L的比例＜10%.结论石家庄市碘盐生产企业碘盐质量和儿童、育龄妇女碘营养都已经达到国家消除碘缺乏病阶段目标要求.

Quality assessment of iodized salt and a survey of urinary iodine level in Shijiazhuang city from 2004 to 2008

Objective To assess the quality of iodized salt and investigate the urinary iodine level of pupils and women after implementation of universal salt iodization in Shijiazhuang city. Methods Between 2004 and 2008, nine salt samples were randomly collected from wholesale enterprises of 5 different directions of east,south, west, north and center in Shijiazhuang city every month. Meanwhile, eight salt samples, four urine samples of women, were randomly collected in each of the 8 households of 210 villages selected from 23 counties. Between 2004 and 2008, twenty urine samples of 8 - 10 year old pupils were collected in each of 160 schools from the 23 counties. Direct titration method was used for salt iodine determination, iodine concentration in urine was detected by the method of ammonium persulfate digestion-As3+-Ce4 + catalytic spectrophotometry. Results At wholesale level, the qualified rate of iodized salt was above 99%. At household level, the consuming rate of iodized salt was above 95%, and the rate of consuming non-iodized salt was less than 5%. The rate of qualified iodized salt was above 90% in every year except 2004(87.10%), and the rate of consuming qualified iodized salt was above 90% in those years except 2004(83.08%). Urinary median iodine level of both the pupils and the women was higher than 100 μg/L, and the rate of urinary iodine level that less than 50 μg/L was below 10%. Conclusions The quality assessment of iodized salt from wholesale companies and related indices of urinary iodine level of pupils, women and household iodized salt have already reached the national standard for eliminating iodine deficiency disorders.