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壳聚糖印迹树脂固相微萃取/化学发光法在线测定废水中Cr3+
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作者单位
吴迎春,聂峰,岳宇超 1.陕西理工学院化学与环境科学学院2.汉中谱惠测试有限公司 
基金项目:国家自然科学基金项目(21475105);陕西理工学院横向项目(4250710)
中文摘要:以Cr3+为模板,戊二醛为交联剂,制得对Cr3+具有选择性吸附作用的壳聚糖印迹交联树脂,研究了其对Cr3+的吸附性能。实验结果表明:所合成的Cr3+模板壳聚糖分子印迹交联聚合物对Cr3+具有很高的吸附性和选择性。将该树脂填充在微型玻璃柱中制成固相萃取柱,串联到流动注射化学发光装置中,并将固相萃取柱固定在发光仪的检测室中作为化学发光池,利用Cr3+对Luminol-H2O2化学发光体系的催化作用,实现了环境废水中Cr3+的在线分离与高灵敏检测。Cr3+的线性范围为1.0×10-8~1.0×10-5 g/L,检出限为3.7×10-9 g/L,相对标准偏差为3.8%(ρCr3+=1.0×10-6 g/L,n=11),微型分离柱运行达180余次,分离效果无明显变化。
中文关键词:壳聚糖  分子印迹聚合物  化学发光    固相微萃取
 
On-line Determination of Cr3+ in Wastewater by Imprinting Chitosan Resin Solid phase Extraction Combined with Flow Injection Chemiluminescence
Abstract:A molecular imprinted polymer of cross linking chitosan was developed with Cr3+ as template molecule and glutaraldehyde as crosslinking agent.The adsorption properties of the molecular imprinted polymer were studied and the result showed that the imprinting crosslinked chitosan resin has good capacities of both absorption and selection for Cr3+.The imprinting crosslinked chitosan resin was used to prepare a solid phase extraction column,which was connected to a chemiluminescence analysis system as a CL cell.By using the catalytic action of Cr3+ on the chemiluminescence of luminol-H2O2 system,a new flow injection combined with on-line preconcentration and separation chemiluminescence method was set up for the determination of Cr3+.The linear range for the proposed method was in the range of 1.0×10-8-1.0×10-5 g/L.The detection limit was 3.7×10-9 g/L,and the relative standard deviation was 3.8%(ρCr3+=1.0×10-6 g/L,n=11).After running more than 180 times,the separation efficiency of the solid phase extraction column did not change obviously.
Key Words:chitosan  molecular imprinted polymer  chemiluminescence  chromium  solid-phase extraction
引用本文:吴迎春,聂峰,岳宇超.壳聚糖印迹树脂固相微萃取/化学发光法在线测定废水中Cr3+[J].分析测试学报,2015,34(6):686-690.
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