新体系Fe（Ⅲ）－KIO＿4－偶氮氯磷Ⅲ催化动力学光度法测定食品中痕量铁的研究  

Cataltic Kinetic Spectrophotometric De-termination of Trace Fe(Ⅲ)in Food by a newAystem of Fe(Ⅲ)-KIO_4-Chorophosphonzao Ⅲ

作　　者：崔丽君[1] 曹平芳[1] 郑乐琳 祝亮 

机构地区：[1]山东建村学院应化系

出　　处：《分析试验室》1996年第6期66-68,共3页Chinese Journal of Analysis Laboratory

摘　　要：研究了在硫酸介质中，痕量Ｆｅ（Ⅲ）催化高碘酸钾氧化氨氯磷Ⅲ的褪色反应及其动力学条件。本法检测限为８．７８×１０￣（０９）ｇ／Ｌ，测Ｆｅ（Ⅲ）范围０～１．４μｇ／１０ｍＬ，采用硫基葡聚糖凝胶分离富集，使本法选择性大大提高，建立了一种高灵敏、高选择性测定痕量Ｆｅ（Ⅲ）的新方法，用于食品中痕量Ｆｅ（Ⅲ）的测定，结果满意。method has been established for the de-termination of trace Fe(Ⅲ)Wmich catalyzesthe KIO_4 oxidizing discoloration of chlorophos-phonazo Ⅲ in H_2SO_4 solution and the kneticconditions have been studied. The range fordetermination of Fe(Ⅲ)is 0～1.4μ/10mL,andthe detection limit is 8.78×10￣(-9)g/L,Commonmetal ions can be separated by mercapto-con-taining dextran gel,so the selectivity of themethod is good.The new method has high sen-sitivity and high selectivity.It has been appliedto determine trace Fe(Ⅲ)in food with satis-factory results.

关 键 词：巯基葡聚糖凝胶 催化光度法 食品分析 铁 

分 类 号：TS207.3[轻工技术与工程—食品科学]