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| 在线固相氧化物吸附-火焰原子吸收法测定痕量银 | |
| 引用本文： | 于洪梅,朱秀慧,陈明丽,田永,王建华.在线固相氧化物吸附-火焰原子吸收法测定痕量银[J].高等学校化学学报,2010,31(10):1949-1954. |
| 作者姓名： | 于洪梅 朱秀慧 陈明丽 田永 王建华 |
| 作者单位： | 1. 东北大学分析科学研究中心,沈阳,110819;辽宁科技大学化工学院,鞍山,114051 2. 辽宁科技大学化工学院,鞍山,114051 3. 东北大学分析科学研究中心,沈阳,110819 |
| 基金项目： | 国家杰出青年科学基金(批准号:20725517); 国家自然科学基金重大国际合作项目(批准号:20821120292),国家自然科学基金(批准号:20805004); 中央高校基本科研业务费资助项目(批准号:N090105001,N090605001,N090405004)资助 |
| 摘 要： | 基于硅胶表面对碱性体系中新生成的氧化银(Ag2O)的有效吸附,建立了流动注射-固相氧化物分离富集-火焰原子吸收法测定痕量银的方法.当银以氧化物的形式被滞留在硅胶固相表面时,硅胶表面的硅醇基和表面电荷有利于反应体系中新生成的Ag2O胶状沉淀的吸附,将收集的沉淀用HNO3(10%,体积分数)洗脱后用火焰原子吸收测定.当进样体积为5.4mL时,测得的富集系数为25.5,检出限为0.6μg/L,采样频率为50次/h,线性范围为2～150μg/L,相对标准偏差(RSD)为2.0%(40μg/L,n=11).将该法用于自来水、河水、井水、雪水和山泉水中银含量的测定,加标回收率分别为93.3%,89.5%,96.6%,108.4%和102.8%. |
| 关 键 词： | 流动注射 固相氧化物吸附 氧化银 火焰原子吸收法 |
| 收稿时间： | 2010-04-07 |
Determination of Trace Silver in Water Samples by On-line Solid Phase Oxide Collection-Flame Atomic Adsorption Spectrometry |
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| YU Hong-Mei,ZHU Xiu-Hui,CHEN Ming-Li,TIAN Yong,WANG Jian-Hua.Determination of Trace Silver in Water Samples by On-line Solid Phase Oxide Collection-Flame Atomic Adsorption Spectrometry[J].Chemical Research In Chinese Universities,2010,31(10):1949-1954. | |
| Authors: | YU Hong-Mei ZHU Xiu-Hui CHEN Ming-Li TIAN Yong WANG Jian-Hua |
| Institution: | YU Hong-Mei1,2,ZHU Xiu-Hui2,CHEN Ming-Li1,TIAN Yong1,WANG Jian-Hua1*(1.Research Center for Analytical Sciences,Northeastern University,Shenyang 110819,China,2.School of Chemical Engineering,Liaoning University of Science and Technology,Anshan 114051,China) |
| Abstract: | A novel flow injection-solid phase oxide collection-flame atomic adsorption spectrometry(FAAS) was developed for the determination of trace silver in water samples using sodium hydroxide as precipitating reagent and silica beads as adsorbent.Silver was precipitated in form of oxide and then collected on solid phase surface of silica beads packed micro-column as oxide collector.The silanol groups and surface charges on the surface of silica beads contribute to precipitation adsorption of Ag2O.The precipitate... |
| Keywords: | Flow injection Solid phase oxide adsorption /collection Silver oxide Flame atomic adsorption spectrometry |
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