在线氧燃烧结合氢化物发生原子荧光光谱法用于有机质中硒的测定  

Determination of Selenium in Organic Matrices Using Hydride Generation Atomic Fluorescence Spectrometry Combined with Online Oxygen Combustion

作　　者：马源源 胡晓辉 丁永玉 高祥栋 段太成[1,2] MA Yuan-Yuan;HU Xiao-Hui;DING Yong-Yu;GAO Xiang-Dong;DUAN Tai-Cheng(State Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院长春应用化学研究所,电分析化学国家重点实验室,长春130022 [2]中国科学技术大学应用化学与工程学院,合肥230026

出　　处：《分析化学》2024年第10期1602-1608,共7页Chinese Journal of Analytical Chemistry

摘　　要：基于有氧燃烧结合氢化物发生原子荧光光谱(HG-AFS)法构建了高通量测定有机质样品中硒(Se)含量的在线样品分解与检测方法。Se有氧燃烧唯一产物SeO2在开放系统中被定量捕获在燃烧瓶壁上,然后以10%(V/V)HCl载流液与2%(m/V)NaBH4还原液在燃烧瓶内进行在线洗脱及原位蒸气发生反应。在优化的条件下,对于0.2 g的最大样品处理量,样品分析通量为20 sample/h,Se的检出限(LOD,3SD)低至0.012 mg/kg,平行测定的相对标准偏差(RSD,n=6)为1.7%。采用本方法对认证参考物质扇贝(GBW10024)和鸡肉(GBW10018)的测试结果与标称值一致,并且实际样品的测试结果与传统湿法消解的测试结果吻合良好,表明本方法的准确性良好。An online sample decomposition and detection method for high-throughput determination of Se content in organic samples was established based on oxygen combustion combined with hydride generation atomic fluorescence spectrometry.The sole product of Se in oxygen combustion,SeO2,was quantitatively captured on the walls of the combustion flask in an open system.It was then eluted online and reacted in situ with 10%(V/V)HCl carrier solution and 2%(m/V)NaBH4 reductant solution within the combustion flask.After optimization,for a maximum sample processing amount of 0.2 g,the sample analysis throughput was 20 sample/h.The detection limit(LOD,3SD)for Se reached 0.012 mg/kg,and the relative standard deviations for parallel determinations(RSDs,n=6)was 1.7%.The analytical results of certified reference materials,scallop(GBW10024)and chicken(GBW10018),were consistent with the certified values,and the analytical results of real samples were in good agreement with those obtained by traditional wet digestion.

关 键 词：在线样品分解 氢化物发生原子荧光光谱法 硒 有氧燃烧 

分 类 号：O657.31[理学—分析化学] TS218[理学—化学]