| 交联壳聚糖在汞形态分析中的应用 |
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| 引用本文： | 王梅林,黄淦泉.交联壳聚糖在汞形态分析中的应用[J].分析化学,1998,26(1):12-16. |
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| 作者姓名： | 王梅林 黄淦泉 |
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| 作者单位： | 武汉大学环境科学系 |
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| 基金项目： | 湖北省自然科学基金资助项目 |
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| 摘 要： | 研究了一种新型溶于水，酸，碱的交联壳聚糖在汞形态分析中的应用。以ＥＤＴＡ为络合剂，交联壳聚糖能选择性富集分离无机汞；以ＫＩ作为络合剂，交联壳聚糖同时富集甲基汞，乙基汞和苯基汞，０．４ｍｏｌ／ＬＮａＯＨ可定量洗脱苯基汞，１．０ｍｏｌ／ＬＮａＯＨ定量洗脱烷基汞，
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| 关 键 词： | 交联壳聚糖 分离富集 分光光度法 汞 形态分析 |
Application of Crosslinked Chitosan to Speciation of Mercury |
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| Wang Meilin,Huang Ganquan,Qian Shahua,Wang Yuting,Jiang Jiansheng.Application of Crosslinked Chitosan to Speciation of Mercury[J].Chinese Journal of Analytical Chemistry,1998,26(1):12-16. |
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| Authors: | Wang Meilin Huang Ganquan Qian Shahua Wang Yuting Jiang Jiansheng |
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| Abstract: | A kind of crosslinked chitosan insoluble in aqueous solution, acid and alkali has been applied to the speciation of mercury in this paper. The crosslinked chitosan could selectively preconcentrate inorganic mercury in the presence of KI. Phenylmercury was selectively eluted off after adsorption from the crosslinked chitosan with 0. 4 mol/L NaOH. The eluted organic mercury was determinaed by cold-vapour atomic absorption spectrophotometry after oxidation with K2Cr2O7/CdCl2 and reduction with KBH4. The preconcentration factor of the method reached 100, the detection limits of inorganic mercury, ph-Hg, alkyl-Hg were 7. 8 ng/L, 9. 8ng/L, 12ng/L respectively, the recoveries were 94%-98% and the RSD was smaller than 8. 0% for the speciation determination of 50ng/L of mercury in water(n= 11). |
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| Keywords: | Crosslinked chitosan separation and preconcentration cold vapor atomic absorption spectrometry mercury speciation |
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