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J Agric Food Chem

Title:		Development of a Solid-Phase Microextraction-Gas Chromatography/Mass Spectrometry Method for Quantifying Nitrogen-Heterocyclic Volatile Aroma Compounds: Application to Spirit and Wood Matrices
Author(s):		Picard M; Garrouste C; Absalon C; Nonier MF; Vivas N; Vivas N;
Address:
Journal Title:		J Agric Food Chem
Year:		2019
Volume:		20191122
Issue:		49
Page Number:		13694 - 13705
DOI:		10.1021/acs.jafc.9b05716
ISSN/ISBN:		1520-5118 (Electronic) 0021-8561 (Linking)
Abstract:		"Over wood aging, matured spirits developed a complex aromatic bouquet where roasted-like notes were often perceived. Since many nitrogen heterocycles were related to these olfactory nuances, a headspace solid-phase microextraction (HS-SPME) coupled to gas chromatography-mass spectrometry was developed and validated to quantify them in both spirit and wood matrices. The various parameters affecting the extraction of the analytes from both spirit and wood samples were first investigated (i.e., fiber coating phase, dilution, pH and volume sample, adding salt, extraction time and temperature, and incubation time) to determine the best compromise for a single-run analysis of the whole set of studied compounds. Good linearity (R(2) > 0.99), repeatability, reproducibility, accuracy and low detection, and quantification limits were obtained, making this analytical method a suitable tool for routine analysis of the selected nitrogen compounds. Fifteen pyrazines, three pyrroles, and three quinolines were quantified in a series of oak wood and commercial spirit samples where some of them were identified for the first time. The significant impact of some barrel features and the spirit in-wood maturation step on the N-heterocycle profile in both matrices were finally discussed"
Keywords:		Gas Chromatography-Mass Spectrometry/*methods Heterocyclic Compounds/*chemistry/*isolation & purification Odorants/analysis Quercus/chemistry Solid Phase Microextraction/*methods Volatile Organic Compounds/*chemistry/*isolation & purification Wine/*analys;
Notes:		"MedlinePicard, Magali Garrouste, Carla Absalon, Christelle Nonier, Marie-Francoise Vivas, Nathalie Vivas, Nicolas eng Evaluation Study 2019/11/23 J Agric Food Chem. 2019 Dec 11; 67(49):13694-13705. doi: 10.1021/acs.jafc.9b05716. Epub 2019 Nov 22"