Preparation of Diphenylguanidine-imprinted Polymer and Its Application for Solid-phase Extraction

WEI Ya-fang,FAN Jing,SHAO Xiao-jing (Henan Key Laboratory for Environmental Pollution Control,Key Laboratory for Yellow and Huaihe River Water Environment and Pollution Control,School of Chemistry and Environmental Science,Henan Normal University,Xinxiang 453007,China)  

A molecularly imprinted solid phase extractant,particularly for the recognition of diphenylguanidine(DPG) was prepared using diphenylguanidine(DPG) as the template and bulk polymerization.The extractant was then loaded onto a micro-column.The characteristics of selective separation and preconcentration of DPG and its structural analogs on the column were examined and the analytical parameters including column breakthrough volume and column binding capacity were studied.Results indicated that the binding capacity of the solid-phase extraction(SPE) column was very high and that the column has very high selectivity for DPG under optimum rinsing and eluting conditions.The SPE column could be reused at least 40 times.The developed procedure has been applied in the determination of DPG in environmental water and solid samples with satisfactory results.The recoveries and RSDs were range of 101%-105%and 1.1%-4.7%,respectively.

【Key Words】： diphenylguanidine molecular imprinting solid-phase extraction environmental samples
【Fund】： 河南省基础与前沿技术研究计划资助项目(082300423202)
【CateGory Index】： O658.2

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