| 荧光猝灭法测定婴幼儿米粉中的铁 |
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| 引用本文： | 乔善宝,王庆东,焦昌梅.荧光猝灭法测定婴幼儿米粉中的铁[J].化学世界,2010,51(1). |
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| 作者姓名： | 乔善宝 王庆东 焦昌梅 |
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| 作者单位： | 盐城师范学院应用化学与环境工程研究所,江苏,盐城,224002 |
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| 摘 要： | 根据铁对二氨基顺丁烯二腈的荧光具有猝灭的特性,建立了一种测定痕量铁的新方法。体系的最大激发波长为226 nm,最大发射波长为406 nm。线性范围为0.01~0.48 mg/L,相关性系数为0.996 2,检出限为1.5μg/L。对10份含有0.16 mg/L的铁标准溶液进行精密度检测,其相对标准偏差为0.17%。用该方法测定了婴幼儿米粉中的铁,结果令人满意。
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| 关 键 词： | 铁 二氨基顺丁烯二腈 荧光猝灭 米粉 |
Determination of Iron in Infant Cereal Based on the Fluorescence Quenching |
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| QIAO Shan-bao,WANG Qing-dong,JIAO Chang-mei.Determination of Iron in Infant Cereal Based on the Fluorescence Quenching[J].Chemical World,2010,51(1). |
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| Authors: | QIAO Shan-bao WANG Qing-dong JIAO Chang-mei |
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| Affiliation: | Institute of Applied Chemistry and Environmental Engineering;Yancheng Teacher's College;Jiangsu Yancheng 224002;China |
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| Abstract: | A new method for the determination of trace amounts of iron has been developed.This method is based on the quenching of fluorescence of.diaminomaleonitrile(DAMN)due to the formation of the complex Fe(Ⅲ)-DAMN.The exitation and emission wavelengths were found to be 226 nm and 406 nm,respectively.There was a linear relationship in the range of 0.01～0.48 mg/L for Fe(Ⅲ),and the correlative coefficient was 0.996 2.The detection limit was 1.5 μg/L for Fe(Ⅲ).The RSD was 0.17%(n=10)for 0.16 mg/L Fe(Ⅲ).This method is simple and rapid,and has been applied to the determination of iron in infant cereal with satisfactory results. |
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| Keywords: | iron DAMN flourescence quenching infant cereal |
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