氨基化四氧化三铁磁性纳米粒子富集石墨炉原子吸收法检测苯胂酸  

Determination of phenyl arsonic acids based on enrichment of amino-modified Fe_3O_4 by graphite furnace atomic absorption spectrometry

作　　者：李燃[1] 贾静[1] 朱若华[1] 王培龙[2] 

机构地区：[1]首都师范大学化学系,北京100048 [2]中国农业科学院质量标准所,北京100081

出　　处：《分析试验室》2013年第5期71-76,共6页Chinese Journal of Analysis Laboratory

基　　金：农业部公益性行业(农业)项目(201203088)资助

摘　　要：合成了磁性功能材料,氨基化的Fe3O4纳米粒子,以丙酮作溶剂对洛克沙胂、对氨基苯胂酸、对羟基苯胂酸、对硝基苯胂酸、对酰胺基苯胂酸进行吸附,石墨炉原子吸收光谱法进行检测。对合成的磁性材料进行了表征,并详细研究了其对苯胂酸的吸附性能。结果表明,合成的磁性材料对苯胂酸具有良好的选择性,5 min内便可吸附完全,吸附率接近100%。该方法在10～200 ng/mL范围内线性良好,检出限低于1 ng/mL,RSD均低于5.6%,将合成材料用于鸡饲料中5种苯胂酸的测定,加标回收率均在63%～104%之间。Magnetic functional material, amino-modified Fe3O4 nanoparticles, were synthesized for sorptive extraction of five phenyl arsonic acids compounds including p-aminophenyl arsonie acids （APAA）, p-nitrophenyl arsonic acid （NPAA） , p-hydmxyphenyl arsonic acid （p-HPAA） , p-acylaminophenyl arsonic acid （AAPAA） and p-hydroxy-3-nitrobenzenearsonic acid （Roxarsone, ROX） in acetone solution. Graphite furnace atomic absorption spectrometry was proposed for the determination of five phenyl arsonic acid compounds. The synthesized aminomodified magnetic nanomaterials were characterized and its adsorption properties to phenyl bensonic acids were studied. Experimental results showed that the amino-modified Fe3O4 nanoparticles can selectively adsorb phenyl arsonic acids quickly and efficiently. The adsorption process was completed in 5 minutes with adsorption efficiency closed to 100%. The limits of detection （LODs） were less than lng/mL in the range of 10 -200 ng/mL for five phenyl arsonic compounds with the relative standard deviations （RSDs） below 5.6%. And recoveries for the spiked samples were 63% -104%. This proposed method laid a good foundation for the determination and enrichment of trace phenyl arsenic in environment samples.

关 键 词：氨基化 磁性 四氧化三铁 苯胂酸 石墨炉 原子吸收光谱法 

分 类 号：O657.3[理学—分析化学]