文献类型：期刊文献

中文题名：催化动力学光度法测定水果中的痕量铁

英文题名：Determination of Trace Iron in Fruit Using Catalytic Kinetic Spectrophotometry

作者：韩虹[1];韩星[2];苏天鹅[1]

第一作者：韩虹

机构：[1]新乡学院化学化工学院;[2]河南省西平县植保植检站

第一机构：新乡学院化学化工学院

年份：2015

卷号：43

期号：11

起止页码：129-130

中文期刊名：广州化工

外文期刊名：Guangzhou Chemical Industry

语种：中文

中文关键词：催化动力学;分光光度法;过氧化氢;乙基紫;铁

外文关键词：catalytic kinetic;spectrophotometry;hydrogen peroxide;ethyl Violet;iron

摘要：研究了在硫酸介质中,约p H=3-4时,Fe（Ⅲ）催化过氧化氢氧化乙基紫体系褪色反应的最佳条件,建立了高灵敏度测定痕量铁的新方法。研究确定了反应的最佳实验条件：最大吸收波长580 nm,最佳温度100℃,最佳反应时间8 min,线性范围：0-0.8μg/25 m L,检出限4.0×10^-10g·m L^-1,该方法仪器设备简单,检测手续简便、快速且具有校好的选择性和重现性,同时与原子吸收法进行了比较,分析结果可靠,应用于水果中痕量铁的测定,结果令人满意。
A new method for the determination of trace iron, Fe（Ⅲ） catalytic decoloring spectrophotometry, was described. The method, which had high sensitivity and selectivity for determining trace iron, was found by the research of the best condition in which the Iron catalyzed the decolorization reaction of hydrogen peroxide and ethyl violet in the sulfuric acid medium. The optimum reaction conditions of the determination were studied as follows： the optimum wavelength was 580 nm, the optimum temperature was 100 ℃, the optimum reaction time was 8 min, the linear range of the determination was 0 - 0. 8 μg / 25 mL and the detection limit for iron was 4×10-10 g·mL^-1 . This method used the simple apparatus, and convenient and fast testing procedures, and had good selectivity and reproducibility. At the same time, it was compared with flame atomic absorption spectrophotometry, applied to the fruit in the determination of iron, with satisfactory results.