螯合铁离子能力测定方法比较  

The comparison of test methods for Fe(Ⅲ) ion chelating power

作　　者：沈淑英[1] 魏艳[1] 赵梅[1] 高慧莲[1] 王凤云[1] 

机构地区：[1]浙江传化股份有限公司,浙江杭州311215

出　　处：《印染助剂》2009年第7期50-52,共3页Textile Auxiliaries

摘　　要：采用三种方法[EDTA滴定法(用磺基水杨酸显色)、Fe3+滴定法(用磺基水杨酸显色)和碘量法]测定螯合剂TF-510、TF-133A、TF-133B的螯合能力,并比较其测定结果.结果表明:3种测定方法各有优缺点,其中,Fe3+滴定法(用磺基水杨酸显色)相对标准偏差最小,操作简单、方便且不受放置时间、样品本身颜色的影响,故测定螯合剂螯合能力时选择此法为宜。Three methods [EDTA titration method （develop using sulfosalicylic acid）, Fe^3＋ titration method （develop using sulfosalicylic acid） and iodimetric method] were used to determine Fe （m） ion chelating power of chelating agents TF-510, TF-133A and TF-133B. And the measurement results were compared. The results indicated that three methods have their advantage and weakness, Fe^3＋ titration method （develop using sulfosalicylic acid） has minimum relative standard deviation, and this method was simple, convenient and it has nothing to do with storage time and sample color. Consequently, this method is the best to determine the chelating power of chelating agent,better precision.

关 键 词：磺基水杨酸 碘量法 EDTA滴定法 Fe3+滴定法 螯合能力 

分 类 号：TQ421.36[化学工程]