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Reference type: Journal
Authors: Arabi M, Ghaedi M, Ostovan A
Article Title: Synthesis and application of in-situ molecularly imprinted silica monolithic in pipette-tip solid-phase microextraction for the separation and determination of gallic acid in orange juice samples.
Publication date: 2017
Journal: Journal of Chromatography B
Volume: 1048
Page numbers: 102-110.
DOI: 10.1016/j.jchromb.2017.02.016
Alternative URL: http://www.sciencedirect.com/science/article/pii/S1570023216309837

Abstract: A novel strategy was presented for the synthesis and application of functionalized silica monolithic as artificial receptor of gallic acid at micro-pipette tip. A sol-gel process was used to prepare the sorbent. In this in-situ polymerization reaction, tetraethyl orthosilicate (TEOS), 3-aminopropyl trimethoxysilane (APTMS), gallic acid and thiourea were used, respectively, as cross-linker, functionalized monomer, template and precursor to make crack-free and non-fragile structure. Such durable and inexpensive in-situ monolithic was successfully employed as useful tool for highly efficient extraction of gallic acid from orange juice samples. The effective parameters in extraction recovery were investigated and optimum conditions were obtained using experimental design methodology. Applying HPLC-UV for separation quantification at optimal conditions, the gallic acid was efficiently extracted without significant matrix interference. Good linearity for gallic acid in the range of 0.02-5.0 mg L-1 with correlation coefficients of R2 > 0.999 revealed well applicability of the method for trace analysis
Template and target information: gallic acid
Author keywords: molecularly imprinted, monolithic, Pipette-tip solid phase microextraction, Gallic acid, Experimental design, HPLC-UV

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