壳聚糖富集分离原子荧光光谱法测定环境水样中无机锡
Atomic Fluorescence Spectrometric Determination of Inorganic Tin in Environmental Water After its Enrichment with Chitosan
摘 要
研究了壳聚糖对无机锡的富集洗脱行为,并对富集的机理进行了探讨.提出了壳聚糖富集分离氢化物发生-原子荧光光谱法测定环境水样中无机锡的方法.研究了富集分离的最佳条件,在pH 4时,壳聚糖对Sn(Ⅱ)和Sn(Ⅳ)的富集率分别为96%和99%以上,用1%~30%(体积分数)的硫酸即可定量洗脱,同时考察了共存元素的影响,方法的检出限为4.5 ng·L-1,回收率在93%以上,相对标准偏差为4.5%.
壳聚糖
富集分离
锡
HG-AFS
Enrichment and separation
Chitosan
Tin
Abstract
Behavior of chitosan as a reagent for enrichment of inorganic tin and the condition of elution were studied.Tin in the eluate was determined by the AFS with hydride generation.Both the stannous and stannic tin was adsorbed on chitosan at pH 4.0 with adsorption efficiency of 96% and 99% respectively.Tin(Ⅱ,Ⅳ) was then desorbed quantitatively from chitosan by elution with 5 mL of H2SO4 (4+96).The eluate was diluted with 5 mL of H2O and submitted to analysis for its tin content by HG-AFS.Under the condition of the proposed method,interferences of commonly co-existing ions and also of the organic tin compounds were eliminated.Detection limit (3S) of this method was 4.5 ng·L-1.RSD′s (n=11) found were 4.5%.Recovery over 93% was achieved.
中图分类号 O657.3
所属栏目 工作简报
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收稿日期 2005/7/14
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备注何振宇(1973-),男,重庆人,副主任技师,硕士,从事环境及食品方面的理化检验研究.
引用该论文: HE Zhen-yu,XU Feng-hua,XU Yun-bin. Atomic Fluorescence Spectrometric Determination of Inorganic Tin in Environmental Water After its Enrichment with Chitosan[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2007, 43(3): 223～225
何振宇,许风华,徐云斌,钱沙华. 壳聚糖富集分离原子荧光光谱法测定环境水样中无机锡[J]. 理化检验－化学分册, 2007, 43(3): 223～225
被引情况:
【1】张丛丛,王珊,肖阳,葛慎光,于京华, "基于荧光猝灭效应的催化荧光光度法测定痕量锡(Ⅳ)",理化检验－化学分册 45, 1083-1085(2009)
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【3】支国瑞,刘及红,马宏彦,等.ICP-AES法直接测定钢中微量As、Sn、Sb[J].光谱实验室,2002,19(4):486-487．
【4】王江彤,牟世芬,孙群.离子色谱法快速连续测定锗和锡的研究[J].色谱,1994,12(5):333-335．
【5】庄谦义,甘进平,孔亮,等.固相萃取真空装置的设计与应用[J].色谱,1997,15(1):49-50．
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【11】Aifang X,Shahua Q,Ganquan H,et al.Separation and preconcentration of MnⅦ/ MnⅡ speciation on crosslinked chitosan and determination by flame atomic absorption spectrometry[J].Analyst,2001,126:239-241．
【12】迟杰,黄国兰.环境中有机锡化合物形态分析方法进展[J].环境科学进展,1999,7(2):31-38．
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