1996-2007年江苏省常州市碘盐监测结果分析

目的 了解江苏省常州市食盐加碘以来生产和居民户层次碘盐合格率及食用情况.方法 每年进行碘盐监测,分食盐批发企业与居民户2个层次,盐碘测定采用GB/T 13025.7-1999中的直接滴定法,川盐或特殊盐采用仲裁法测定;对食盐批发企业与其专营地区居民户盐样含碘量进行比较.结果 1996-2000年在常州市区内共抽检3个批发企业盐样227批、5675份,批质量合格率为60.79%(138/227),碘盐合格率为61.83%(3509/5675);2001-2007年共抽检批发企业盐样252批、2556份,批质量合格率为100.00%(252/252),碘盐合格率为99.88%(2553/2556).1996-2000年抽检236个村中的1583户居民家中盐样,碘盐合格率为74.24%(1170/1576),合格碘盐食用率为73.9l%(1170/1583),盐碘中位数为45.14 mg/kg;2001-2007年抽检1656村中的13 140户居民家中盐样,碘盐合格率为98.03%(12 830/13 088).合格碘盐食用率为97.64%(12 830/13 140),盐碘中位数为30.13 mg/kg.3个盐业批发企业中,盐碘最大相差3.46 mg/kg.居民户盐碘较批发企业减少4.95%(1.65/33.35).结论 常州市碘盐合格率和食用情况在食盐加碘防治碘缺乏病的起始阶段即达到国家要求.居民户层次碘盐质量直接与批发企业供应的碘盐有关,食盐从批发企业到居民户盐碘有损失现象.

Analysis on iodized salt surveillance of Changzhou City in Jiangsu Province during 1996-2007

Objective To explore the qualification and consuming of iodized salt at wholesale and household levels after Salt Iodization.Methods Iodized salt surveillance at wholesale and household levels every year by detecting iodine content.Direct titration method(GB/T 13025.7-1999)was used for salt iodjne detecting and arbitration method was used for Sichuan salt and special salt.Results Five thousand six hundred and seventy five samples of 227 batches from 3 wholesale industries were detected during 1996-2000,batch qualification rate was 60.79%(138/227)and iodized salt qualification rate was 61.83%(3509/5675).During 2001-2007,2556 samples of 252 batches from wholesale levels were detected.The batch qualification rate and iodized salt qualification rate were 1 00%(252/252)and 99.88%(2553/2556),respectively.At household level.1583 samples from 236 villages were detected during 1996-2000.Iodized salt qualification rate was 74.24%(1 170/1576)and consuming rate of qualified iodized salt was 73.91%(1 170/1583)and iodine median was 45.14 mg/kg.During 2001-2007,13 140 samples from 1656 villages were detected.Iodized salt qualification rate,consuming rate 0f qualified iodized salt and iodine median were 98.03%(12 830/13 088),97.64%(12 830/13 140)and 30.13 mg/kg,respectively. The most difference of iodine content was 3.46 mg/kg in 3 wholesale industries.At household level there was a 4.95%reduction in comparison with at wholesale level.Conclusions Salt iodization level and edible iodine salt reach the national requirements of iodine deficiency control from the starting stage.The quality 0f iodized saIt at household level related to the exclusive wholesale industry and loss phenomenon maybe existed when salt was sold from wholesale industries to residents.