Comparison of experimental methods for measuring infinite dilution volatilities of aroma compounds in water/ethanol mixtures
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Date
2004
Journal Title
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Publisher
AMER CHEMICAL SOC
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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Keywords
aroma compounds, alcoholic beverages, multicomponent mixtures, static headspace, HEADSPACE-GAS-CHROMATOGRAPHY, AUTOMATIC EQUILIBRIUM HEADSPACE, LIQUID PARTITION-COEFFICIENTS, SOLID-PHASE MICROEXTRACTION, MODEL SPIRIT SOLUTIONS, ETHYL-ESTERS, FLAVOR COMPOUNDS, WATER, VAPOR, WINE