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Issue 20, 2011
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On-chip sample pretreatment using a porous polymer monolithic column for solid-phase microextraction and chemiluminescence determination of catechins in green tea

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Abstract

A porous polymer monolithic column for solid-phase microextraction and chemiluminescence detection was integrated into a simple microfluidic chip for the extraction and determination of catechins in green tea. The porous polymer was prepared by poly(glycidyl methacrylate-co-ethylene dimethacrylate) and modified with ethylenediamine. Catechins can be concentrated in the porous polymer monolithic column and react with potassium permanganate to give chemiluminescence. The microfluidic chip is reusable with high sensitivity and very low reagent consumption. The on-line preconcentration and detection can be realized without an elution step. The enrichment factor was calculated to be about 20 for catechins. The relative chemiluminescence intensity increased linearly with concentration of catechin from 5.0 × 10−9 to 1.0 × 10−6 M and the limit of detection was 1.0 × 10−9 M. The proposed method was applied to determine catechin in green tea. The recoveries are from 90% to 110% which benefits the actual application for green tea samples.

Graphical abstract: On-chip sample pretreatment using a porous polymer monolithic column for solid-phase microextraction and chemiluminescence determination of catechins in green tea

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Publication details

The article was received on 26 Jun 2011, accepted on 23 Jul 2011 and first published on 30 Aug 2011


Article type: Paper
DOI: 10.1039/C1AN15530J
Citation: Analyst, 2011,136, 4260-4267
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    On-chip sample pretreatment using a porous polymer monolithic column for solid-phase microextraction and chemiluminescence determination of catechins in green tea

    L. Lin, H. Chen, H. Wei, F. Wang and J. Lin, Analyst, 2011, 136, 4260
    DOI: 10.1039/C1AN15530J

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