| 纳米TiO2富集分离石墨炉原子吸收法测定食品中的锰 |
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| 引用本文： | 刘辉,周志贞. 纳米TiO2富集分离石墨炉原子吸收法测定食品中的锰[J]. 化工时刊, 2008, 22(9): 18-20 |
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| 作者姓名： | 刘辉 周志贞 |
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| 作者单位： | 徐州工程学院食品学院,江苏,徐州,221008;徐州工程学院食品学院,江苏,徐州,221008 |
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| 摘 要： | 以石墨炉原子吸收为检测手段，研究了纳米TiO2对金属Mn的吸附性能，考察了吸附和洗脱的主要影响因素。结果表明：在pH值10—11范围内，纳米二氧化钛对金属Mn具有良好的吸附性，吸附率达到96．45％，0．5mol／L的硝酸即可将纳米二氧化钛吸附的锰完全洗脱。在优化的实验条件下，静态吸附量为15．9mg／g。本法的检出限为（3σ）2．02×10^-13g，（RSD）为3．18％-5．21％，富集倍数为75倍，加标回收率在93．3％～105．5％之间。本法对标准样品的测定与参考值相吻合。用于实际食品中Mn的测定，结果令人满意。
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| 关 键 词： | 锰 纳米TiO2 原子吸收 分离富集 |
Determination of Mn in Food Sample by Nanometer - Titanium Dioxide Preconcentration and Separation - Atomic Absorption Spectroscopy |
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| Liu Hui,Zhou Zhizhen. Determination of Mn in Food Sample by Nanometer - Titanium Dioxide Preconcentration and Separation - Atomic Absorption Spectroscopy[J]. Chemical Industry Times, 2008, 22(9): 18-20 |
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| Authors: | Liu Hui Zhou Zhizhen |
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| Affiliation: | Liu Hui Zhou Zhizhen (Food college, Xuzhou Techndogy college, Jiangsu Xuzhou 221008) |
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| Abstract: | The adsorption and desorption behavior of nanometer TiO2 towards Mn was investigated by atomic absorption spectroscopy. It was found that the adsorption fraction of Mn was 96.45% at pH 10 - 11 and the elution with 0.5 mol/L HNO3 was sufficient for Mn. The adsorption capacities was 15.9 mg/g. The detection limit （3σ） was 2.02 ×10^-13g,and RSD was 3.18% -5.21%. The enrichment multiple was 75. The recoveies were 92.4% - 105.5%. The method was applied to the determination of Mn in food samples and the results were satisfactory. |
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| Keywords: | Mn Nanometer -Titanium Dioxide Atomic Absorption Spectroscopy Preconcentration and Separation |
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