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Anal Chim Acta

Title:		Optimization of thin film-microextraction (TF-SPME) method in order to determine musts volatile compounds
Author(s):		Marin-San Roman S; Carot JM; Saenz de Urturi I; Rubio-Breton P; Perez-Alvarez EP; Garde-Cerdan T;
Address:		"Grupo VIENAP, Instituto de Ciencias de la Vid y del Vino (CSIC, Universidad de La Rioja, Gobierno de La Rioja), Ctra. de Burgos, Km. 6, 26007, Logrono, Spain. Departamento de Estadistica e Investigacion Operativa Aplicadas y Calidad, Universidad Politecnica de Valencia, Camino de la Vera s/n, 46022, Valencia, Spain. Grupo VIENAP, Instituto de Ciencias de la Vid y del Vino (CSIC, Universidad de La Rioja, Gobierno de La Rioja), Ctra. de Burgos, Km. 6, 26007, Logrono, Spain. Electronic address: teresa.garde.cerdan@csic.es"
Journal Title:		Anal Chim Acta
Year:		2022
Volume:		20220814
Issue:
Page Number:		340254 -
DOI:		10.1016/j.aca.2022.340254
ISSN/ISBN:		1873-4324 (Electronic) 0003-2670 (Linking)
Abstract:		"It is well known that grape aromatic composition is directly correlated to the final wine quality. To determine this composition, a previous stage of selective extraction is necessary, since the aromatic compounds are found in very low concentrations in the grapes. Therefore, in this work, the thin film microextraction technique (TF-SPME) was optimized, for first time, with the aim to analyze the volatile composition of the grape musts. The results obtained with the two commercially available absorbent materials for TF-SPME, polydimethylsiloxane/carboxene (PDMS/CAR) and PDMS/divinylbenzene (PDMS/DVB), were optimized and compared. To carry out the optimization, a randomized factorial design was performed combining the following factors and levels: extraction mode (headspace (HS), or direct immersion (DI)), stirring speed (500 and 1000 rpm), extraction time (1, 3 and 6 h), and extraction temperature (20, 40 and 60 degrees C). After performing a principal component analysis (PCA) and an analysis of variance (ANOVA) multifactorial, it was concluded that the best conditions for TF-SPME with PDMS/CAR were: direct immersion (DI), 500 rpm, 6 h, and 20 degrees C, while for TF-SPME with PDMS/DVB no conditions were found that maximized the extraction of most compounds, therefore compromise conditions were chosen: headspace (HS), 500 rpm, 6 h, and 40 degrees C. Finally, the comparison between the results obtained with both absorbents indicated that the absorbent that extracted better the volatile compounds from the musts with the TF-SPME technique, was PDMS/CAR, under the conditions: direct immersion (DI), 500 rpm, 6 h, and 20 degrees C"
Keywords:		Gas Chromatography-Mass Spectrometry/methods Organic Chemicals/analysis Solid Phase Microextraction/methods Temperature *Volatile Organic Compounds/analysis *Wine/analysis Comparison Extraction Grape aroma Optimization PDMS/CAR and PDMS/DVB absorbents Tf-;
Notes:		"MedlineMarin-San Roman, Sandra Carot, Jose Miguel Saenz de Urturi, Itziar Rubio-Breton, Pilar Perez-Alvarez, Eva P Garde-Cerdan, Teresa eng Netherlands 2022/09/07 Anal Chim Acta. 2022 Sep 15; 1226:340254. doi: 10.1016/j.aca.2022.340254. Epub 2022 Aug 14"