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.
出处
《分析试验室》
CAS
CSCD
北大核心
1996年第6期66-68,共3页
Chinese Journal of Analysis Laboratory
关键词
巯基葡聚糖凝胶
催化光度法
食品分析
铁
Catalytic kinetic spectropho-tometry,Mercapto-containing dextran gel
Fe(Ⅲ)determnation
