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Anal Chim Acta

Title:		Fabrication of novel nanoporous array anodic alumina solid-phase microextraction fiber coating and its potential application for headspace sampling of biological volatile organic compounds
Author(s):		Zhang Z; Wang Q; Li G;
Address:		"School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, PR China"
Journal Title:		Anal Chim Acta
Year:		2012
Volume:		20120329
Issue:
Page Number:		13 - 19
DOI:		10.1016/j.aca.2012.03.033
ISSN/ISBN:		1873-4324 (Electronic) 0003-2670 (Linking)
Abstract:		"In the study, nanoporous array anodic alumina (NAAA) prepared by a simple, rapid and stable two-step anodic oxidization method was introduced as a novel solid-phase microextraction (SPME) fiber coating. The regular nanoporous array structure and chemical composition of NAAA SPME fiber coating was characterized and validated by scanning electron microscopy and energy dispersive spectroscopy, respectively. Compared with the commercial polydimethylsiloxane (PDMS) SPME fiber coating, NAAA SPME fiber coating achieved the higher enrichment capability (1.7-4.7 folds) for the mixed standards of volatile organic compounds (VOCs). The selectivity for volatile alcohols by NAAA SPME fiber coating demonstrated an increasing trend with the increasing polarity of alcohols caused by the gradually shortening carbon chains from 1-undecanol to 1-heptanol or the isomerization of carbon chains of some typical volatile alcohols including 2-ethyl hexanol, 1-octanol, 2-phenylethanol, 1-phenylethanol, 5-undecanol, 2-undecanol and 1-undecanol. Finally, NAAA SPME fiber coating was originally applied for the analysis of biological VOCs of Bailan flower, stinkbug and orange peel samples coupled with gas chromatography-mass spectrometry (GC-MS) detection. Thirty, twenty-seven and forty-four VOCs of Bailan flower, stinkbug and orange peel samples were sampled and identified, respectively. Moreover, the contents of trace 1-octanol and nonanal of real orange peel samples were quantified for the further method validation with satisfactory recoveries of 106.5 and 120.5%, respectively. This work proposed a sensitive, rapid, reliable and convenient analytical method for the potential study of trace and small molecular biological VOCs by the novel NAAA SPME fiber coating"
Keywords:		Aluminum Oxide/*chemistry Electrodes Flowers/chemistry Magnoliopsida/chemistry Nanotechnology/*instrumentation Porosity Solid Phase Microextraction/instrumentation/*methods Surface Properties Volatile Organic Compounds/*analysis;
Notes:		"MedlineZhang, Zhuomin Wang, Qingtang Li, Gongke eng Research Support, Non-U.S. Gov't Netherlands 2012/05/01 Anal Chim Acta. 2012 May 21; 727:13-9. doi: 10.1016/j.aca.2012.03.033. Epub 2012 Mar 29"