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Reference type: Conference Proceeding
Authors: Khorrami AR, Rashidpurb A
Publication date: 2011
Article title: Preparation of a Fiber Coating for Selective Solid-phase Microextraction Based on Molecular Sol-gel Imprinting Process: Application for GC/MS Determination of Caffeine in Human Serum.
Alternative URL: http://icc2011.ir/Docs/D.pdf

Conference information: Abstracts, 15th Iranian Chemistry Congress

Abstract: In this work, a sol-gel molecularly imprinting polymerization approach has been introduced to produce fiber coatings for selective solid phase micro extraction (SPME) of caffeine [1,2]. The polymerization mixture was composed of vinyl trimethoxysilane and methacrylic acid as vinyl metal oxide precursor and functional monomer, respectively [3]. Caffeine was used as template molecule during polymerization process. The prepared fiber could be coupled directly to gas chromatography/mass spectrometry (GC/MS) and used for trace analysis of caffeine in a complicated sample such as human serum. The parameters influencing extraction such as time, temperature and stirring speed were optimized. The prepared coating showed good selectivity towards caffeine in the presence of some structurally related compounds. Also, it offered high imprinting capability in comparison to non imprinted coating. Linear range for caffeine was 5.0080 μg ml-1 and detection limit was 0.1 μg ml-1
Template and target information: caffeine


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