Comparison of experimental methods for measuring infinite dilution volatilities of aroma compounds in water/ethanol mixtures |
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| Authors: | Athès Violaine Peña y Lillo Marcial Bernard Clémence Pérez-Correa Ricardo Souchon Isabelle |
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| Institution: | Unité Mixte de Recherche Génie et Microbiologie des Procédés Alimentaires, Institut National de la Recherche Agronomique/Institut National Agronomique Paris-Grignon, 78850 Thiverval-Grignon, France. vathes@grignon.inra.fr |
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| Abstract: | Several experimental methodologies exist for measuring volatilities; however, results show great dispersion and sometimes lack of agreement between different methods. The aim of our study was to compare the performance of three static headspace methods (vapor phase calibration, VPC; phase ratio variation, PRV; and liquid calibration static headspace, LC-SH) for determining gas/liquid partition coefficients of two aroma compounds in hydroalcoholic multicomponent solutions at infinite dilution. Comparison with literature data based on static and dynamic methods showed that PRV is simpler than VPC and LC-SH and that VPC and PRV are more accurate than LC-SH, which presented a significant bias (50% lower values). |
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