| 过氧化氢-邻氨基酚体系催化显色分光光度法测定痕量铁 |
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| 引用本文： | 施先义,吴晓庆,韦芳.过氧化氢-邻氨基酚体系催化显色分光光度法测定痕量铁[J].光谱实验室,2011,28(2):711-714. |
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| 作者姓名： | 施先义 吴晓庆 韦芳 |
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| 作者单位： | 广西现代职业技术学院资源工程系,广西河池市新建西路2号,547000 |
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| 摘 要： | 在乙酸-乙酸钠缓冲溶液(pH=5.6)介质中.Fe(Ⅲ)催化H2O2氧化邻氨基酚显色,建立了催化显色分光光度法测定痕量铁的新方法.在冰水浴中反应10min,Fe(Ⅲ)线性范围为0-1.2μg/mL,回归方程为△4=0.4923C+0.0258,摩尔吸光系数为2.9×104L·mol-1·cm-1.方法用于广西东兰县产墨...
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| 关 键 词： | 邻氰基酚 显色 催化动力分光光度法 铁 |
Determination of Trace Iron by Catalytic Colouration Spectrophotometry with Hydrogen Peroxide-o-Aminophenol Systerm |
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| SHI Xian-Yi,WU Xiao-Qing,WEI Fang.Determination of Trace Iron by Catalytic Colouration Spectrophotometry with Hydrogen Peroxide-o-Aminophenol Systerm[J].Chinese Journal of Spectroscopy Laboratory,2011,28(2):711-714. |
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| Authors: | SHI Xian-Yi WU Xiao-Qing WEI Fang |
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| Institution: | SHI Xian-Yi WU Xiao-Qing WEI Fang(Department of Resources Engineering,Guangxi Modern Polytechnic College,Hechi,Guangxi 547000,P.R.China) |
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| Abstract: | A new catalytic colouration spectrophotometry was developed for the determination of trace iron based on the Fe（Ⅲ） catalyzed oxidation of o-aminophenol by hydrogen peroxide in the acetic acid-sodium acetate buffer solution medium（pH=5.6）.The reaction was allowed to run for 10min in ice water.A linear relationship was established in the range of 0—1.2μg/mL for iron.The regression equation of calibration curve is ΔA=0.4923C＋0.0258.The molar absorptivity was 2.9×104L·mol-1·cm-1.The method was used in determination of trace iron of black glutinous rice from the Guangxi donglan area,the recovery of standard addition was 93.2%—98.3%. |
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| Keywords: | o-Aminophenol Colouration Catalytic Kinetic Spectrophotometry Iron |
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