CHEN Xiao-yan,YANG Ling,SU Li-shen,WU Xiao-ping.Enrichment and Analysis of Trace Microcystins Based on Immobilized Metal Affinity Monolithic Column[J].Journal of Instrumental Analysis,2025,44(01):155-162.
CHEN Xiao-yan,YANG Ling,SU Li-shen,WU Xiao-ping.Enrichment and Analysis of Trace Microcystins Based on Immobilized Metal Affinity Monolithic Column[J].Journal of Instrumental Analysis,2025,44(01):155-162. DOI: 10.12452/j.fxcsxb.240925417.
Enrichment and Analysis of Trace Microcystins Based on Immobilized Metal Affinity Monolithic Column
The immobilized metal ion affinity chromatography(IMAC) theory was employed to design and synthesize a poly(VIM-co-DVB)-Cu
2+
monolithic column. The poly(VIM-co-DVB) matrix monolithic column was initially prepared via thermally initiated polymerization of 1-vinylimidazole(VIM) and divinylbenzene(
DVB),and Cu
2+
was immobilized directly on the matrix monolithic column through a post-modification multi-step method. The extraction conditions of the affinity monolithic columns were optimized. Under the optimal conditions,the poly(VIM-co-DVB)-Cu
2+
monolithic column was applied for capillary microextraction(CME) of microcystins(MCs) prior to high performance liquid chromatography-mass spectrometry(HPLC-MS) analysis in both tap water and lake water samples. The detection limits of MCs ranged from 0.89 to 1.23 ng/L,with recoveries between 80.0% and 105%,and the relative standard deviations(RSDs) were not more than 6.8%. The validated CME/HPLC-MS methodology exhibits exceptional sensitivity and accuracy,making it a valuable tool for the monitoring and analysis of MCs in environmental waters.
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