褪色光度法测定食盐中碘含量测定的最优条件探索  

Study on the Conditions for the Determination of Iodine in Salt by Fading Spectrophotometry

作　　者：田友华 徐薇 田志美 宋崇富 Tian Youhua;Xu Wei;Tian Zhimei;Song Chongfu(Beihai School,Weifang High Tech Industrial Development Zone,Weifang 261031,China;School of Chemistry and Materials Engineering,Fuyang Normal University,Fuyang 236037,China)

机构地区：[1]潍坊高新技术产业开发区北海学校,山东潍坊261031 [2]阜阳师范大学化学与材料工程学院,安徽阜阳236037

出　　处：《山东化工》2020年第9期117-118,121,共3页Shandong Chemical Industry

摘　　要：探讨了二甲基黄褪色光度法的最佳实验条件,测定了几种加碘食盐中微量碘的含量。最优实验条件是:最大吸收波长是510 nm,硫酸用量是2. 50 mL,二甲基黄用量是6. 00 mL,溴酸钾用量是2. 00 mL。碘含量测定的结果与产品说明的范围吻合,表明测定方法是可信的。This paper aimed to explore the best experimental conditions for the fading spectrophotometry of dimethylyellow and determine the content of trace iodine in some iodized salt.The experimental results show that the optimal experimental conditions are:the maximum absorption wavelength is 510 nm,the dosage of sulfuric acid is 2.50 mL,the dosage of dimethylyellow is 6.00 mL,the dosage of potassium bromate is 2.00 mL.The determination of iodine content in salt in this work can give accurate results,which are consistent with the range of product descriptions,indicating that the method is reliable.

关 键 词：褪色法 加碘食盐 碘含量 实验条件探索 

分 类 号：O657.3[理学—分析化学]