对乙酰偶氮胂褪色分光光度法测定食盐中碘  

Spectrophotometric Determination of Iodine by Oxidization-decolorization of P-acetyl-arsenazo

作　　者：孙嘉彦[1] 周君[1] 马建丰[1] 吴海燕[1] 徐建国[1] 

机构地区：[1]南通职业大学化工系,江苏南通226007

出　　处：《南通职业大学学报》2003年第4期50-51,共2页Journal of Nantong Vocational University

摘　　要：研究了在硝酸介质中 ,碘酸根在溴化钾催化作用下氧化对乙酰偶氮胂使其褪色的最佳条件。建立了测定微量碘的方法。λmax=530nm,ε530=1.95×105L·mol-1·cm-1 ,碘酸根在0～8μg/10ml范围内符合比耳定律。A newmethod has been developed for the determination of the microamount of iodine by oxidiza-tion-decolorization with p-acepty-arsenazo in the HNO 3 -KBr medium.The color system has a maxi-mum absorption at530nm with a molar absorptivity of1.95×10 5 L.mol -1 .cm -1 .Beer's law is obeyed in the range of0-8μg/10ml of iodine.The method can be used for determination of amount iodine in the salts.

关 键 词：碘 对乙酰偶氮胂 褪色分光光度法 食盐 

分 类 号：O657.32[理学—分析化学]