停留-催化反应速差动力学法同时测定Fe、Mo

Flow Injection Stopped-flow Kinetic Method Based on Differential Rate of Catalytic Reaction for Simultaneous Determination of Fe(Ⅲ) Mo(Ⅵ)

根据Ｆｅ（Ⅲ）、Ｍｏ（Ⅵ）对Ｈ２Ｏ２氧化邻氨基酚的催化反应速率不同，结合流动注射停留技术，建立了同时测定Ｆｅ（Ⅲ）、Ｍｏ（Ⅵ）的速差动力学分光光度法．测定铁和钼的线性范围分别为０．１～２．５μｇ／ｍＬ和０．５～１５μｇ／ｍＬ．除Ｗ（Ⅵ）的允许量较小外，其它离子不干扰测定．用本法测定了合成样液中铁和钼含量，结果满意．

The catalytic effects of Fe(Ⅲ) and Mo(Ⅵ) on the reaction between hydrogen peroxide and O-aminophenol were studied. A stopped-flow kinetic spectrophotometric method based on the differential rate of catalytic reactions for the simultaneous determination of Fe(Ⅲ) and Mo(Ⅵ) is proposed. The linear range of 0.5-15 μg/mL for Mo(Ⅵ) and 0.1-2.5μg/mL for Fe(Ⅲ) was obtained. Most common ions dont interfere. The method has been used for the determination of Fe(Ⅲ) and Mo(Ⅵ) in mixture samples.