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| 共振光猝灭法测定环境水样中痕量硒 | |
| 引用本文： | 李人宇,李咏梅,吴俊杰,王显金,熊情.共振光猝灭法测定环境水样中痕量硒[J].岩矿测试,2011,30(3):328-332. |
| 作者姓名： | 李人宇 李咏梅 吴俊杰 王显金 熊情 |
| 作者单位： | 1. 连云港师范高等专科学校,江苏连云港,222006;淮海工学院江苏省海洋资源开发研究院,江苏连云港,222005 2. 淮海工学院江苏省海洋资源开发研究院,江苏连云港,222005;淮海工学院化学工程学院,江苏连云港,222005 3. 连云港师范高等专科学校,江苏连云港,222006 |
| 基金项目： | 连云港市科技项目资助，江苏省海洋资源开发研究院科技开放基金项目资助，2010年江苏省高等学校大学生实践创新训练计划立项项目资助，淮海工学院自然科学基金项目资助 |
| 摘 要： | 在阿拉伯树胶(AG)存在下,0.14 mol/L硫酸介质中,硒(Ⅳ)与过量的I-反应生成I3-,加入乙酸钠后I3-与亚甲基蓝反应成离子缔合物,在波长288 nm处共振光猝灭,建立了共振光散射法测定痕量硒的方法.确定了碘化钾、亚甲基蓝、乙酸钠和增溶剂阿拉伯树胶溶液的浓度,在室温(20～30℃)下反应15 min,提高了体... |
| 关 键 词： | 硒 环境水样 共振光猝灭法 碘离子 亚甲基蓝 阿拉伯树胶 |
| 收稿时间： | 2010/1/12 0:00:00 |
| 修稿时间： | 2010/10/28 0:00:00 |
Determination of Trace Selenium in Environmental Water Samples by Using Resonance Light Quenching Method |
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| LI Ren-yu,LI Yong-mei,WU Jun-jie,WANG Xian-jin and XIONG Qing.Determination of Trace Selenium in Environmental Water Samples by Using Resonance Light Quenching Method[J].Rock and Mineral Analysis,2011,30(3):328-332. | |
| Authors: | LI Ren-yu LI Yong-mei WU Jun-jie WANG Xian-jin and XIONG Qing |
| Affiliation: | LI Ren-yu1,2,LI Yong-mei2,3,WU Jun-jie1,WANG Xian-jin1,XIONG Qing1(1.Lianyungang Teachers College,Lianyungang 222006,China,2.Jiangsu Marine Resources Research & Development Institute,Huaihai Institute of Technology,Lianyungang 222005,3.School of Chemical Engineering,China) |
| Abstract: | A new resonance light quenching method for the quantification of trace selenium has been developed.The method is based on the reaction of Se(Ⅳ) with excess I-in 0.14 mol/L H2SO4 solution to produce I-3 with arabic gum(AG).After adding NaAc,I-3 reacts with methylene blue(MB) to form an ion-association complex,resulting in resonance light quenching at a wavelength of 288 nm.The optimum concentrations of KI,MB,NaAc and solubilizer AG were decided.In addition,reaction for 15 min at room temperature(20-30℃) was found out.As a result,the sensitivity and stability of the system was improved.Good linear relationship between resonance light quenching intensity and Se(Ⅳ) concentration occurs in the content range of 0-0.24 μg/mL.The detection limit is 1.01 μg/L.The interferences of Fe3+,Pb2+,Cu2+ and Zn2+ are eliminated by EDTA.This method was applied to the quantification of trace selenium in environmental water samples with RSD of 1.3%-3.6%(n=5) and recoveries from 97.4% to 100.8%. |
| Keywords: | selenium environmental water sample resonance light quenching iodine ion methylene blue arabic gum |
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