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以４０目粉碎的用干混法生产的２３份ＫＩＯ３碘盐散装暴露在空气中，在自然条件下常温常湿存放，经２０次检验：在第２２个月存放期内碘均值基本不变（方差分析Ｆ＝０．０６，Ｐ＝１．００）；存放第３２个月碘下降６．４０％（ｔ＝４．２４１２，Ｐ＝０．００３）；存放第３６个月碘下降９．０８％（ｔ＝４．９８０８，Ｐ＜０．００１）；存放第６０个月碘下降１０．２６％（ｔ＝１０．５２９５，Ｐ＜０．００１）；存放第８４个月碘下降１９．６７％（ｔ＝８．５２８８，Ｐ＜０．００１）；其中第３６、５４、６０、８４个月存放期的１００％样品均有程度不同的碘下降；碘下降率与其样品含碘量呈负相关；提示ＫＩＯ３碘盐化学性质稳定，在碘盐商业流通周期内碘含量基本不变，建议将出厂盐、销售盐、用户盐含碘合格浓度统一为一种标准，其含碘的合格浓度为≥４０ｍｇ／ｋｇ。
Twenty-three KIO3 iodized salt, produced by dry-blending method, crushed at 40 mesh, was exposed to the air in bulk and stored under normal conditions at normal temperature and humidity. After 20 tests, the mean value of iodine in the 22nd month remained unchanged ANOVA, F = 0.06, P = 1.00). The iodine in the 32nd month of storage was decreased by 6.40% (t = 4.2412, P = 0.003) (T = 4.9808, P <0.001). The iodine in the 60th month of storage was decreased by 10.26% (t = 10.5295, P <0.001) % (T = 8.5288, P <0.001). Among them, 100% of the samples in the 36th, 54th, 60th and 84th months of storage had different levels of iodine. The iodine degradation rate was negative Correlation; Tip KIO3 iodized salt is chemically stable, iodine salt in the commercial circulation cycle is basically the same, it is recommended that the factory salt, salt, salt, salt users eligible Unification of the standard concentration of iodine is qualified ≥40mg / kg.