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| Hg~(2+)-碘化物-番红花红T缔合体系褪色光度法测定微量汞 | |
| 引用本文： | 李人宇,李咏梅,吴俊杰,熊情.Hg~(2+)-碘化物-番红花红T缔合体系褪色光度法测定微量汞[J].岩矿测试,2010,29(4):461-464. |
| 作者姓名： | 李人宇 李咏梅 吴俊杰 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，江苏省海洋资源开发研究院科技开放基金项目 |
| 摘 要： | 在0.01 mol/L硫酸介质中,Hg2+与过量I-和番红花红T(ST)反应生成稳定的离子缔合物ST]2HgI4],使ST褪色,据此建立了褪色光度法测定微量汞的方法。最大褪色波长为519 nm,体系的褪色程度与Hg2+浓度在0~1.35μg/mL内呈线性关系,表观摩尔吸光系数为1.24×105L/(mol.cm),检出限为2.26μg/L。采用巯基棉富集分离,测定河水中的微量汞,方法相对标准偏差(RSD,n=5)为1.2%~1.7%,回收率为98.3%~102.6%。 |
| 关 键 词： | 褪色光度法 汞 碘化物 番红花红T 离子缔合物 |
| 收稿时间： | 9/2/2009 12:00:00 AM |
| 修稿时间： | 2010/1/19 0:00:00 |
Fading Spectrophotometric Determination of Trace Mercury with Hg2+-Iodide-Safranine T Complex System |
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| LI Ren-yu,LI Yong-mei,WU Jun-jie and XIONG Qing.Fading Spectrophotometric Determination of Trace Mercury with Hg2+-Iodide-Safranine T Complex System[J].Rock and Mineral Analysis,2010,29(4):461-464. | |
| Authors: | LI Ren-yu LI Yong-mei WU Jun-jie and XIONG Qing |
| Institution: | 1(1.Lianyungang Teachers College,Lianyungang 222006,China;2.Jiangsu Province Marine Resources Research & Development Institute,Huaihai Institute of Technology,Lianyungang 222005,China;3.School of Chemical Engineering,Huaihai Institute of Technology,Lianyungang 222005,China) |
| Abstract: | A fading spectrophotometric method for the determination of trace mercury has been developed.In 0.01 mol/L H2SO4 medium,Hg2+ reacts with excess I-and safranine T(ST) to form a stable ion-association complex(2),which leads to the fading of ST.The maximum fading wavelength locates at 519 nm.The fading degree of the system is linear with the concentration of Hg2+ in the range of 0~1.35 μg/mL.Apparent molar absorption coefficient is 1.24×105 L/(mol·cm) with detection limit of 2.26 μg/L for mercury.Recoveries of Hg2+ are 98.3%~102.6% with precision of 1.2%~1.7% RSD(n=5).The method has been applied in the determination of trace mercury in river water samples after enrichment and separation with thiol cotton fiber. |
| Keywords: | fading spectrophotometry mercury iodide safranine T ion-association complex |
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