Determing solid-gas partition coefficients of monomer ester flavors in cut tobacco matrix by changing comparison method with HS-GC-MS

In order to analyze in depth the release behavior of added flavor components in tobacco matrix using the solid-gas partition coefficient, a PRV-HS-GC-MS method was developed to determine the partition coefficients of monomeric flavors in cut tobacco matrix based on the changing comparison method combined with HS-GC-MS analysis. The partition coefficients(K_cut/air)of six ester flavors in cut tobacco matrix (solid phase)and gas phase were determined by the PRV-HS-GC-MS method. The results showed that: 1)The relative standard deviation (RSD)of K_cut/air of the six ester flavors at 90-110 ℃ ranged from 0.92% to 9.14%. The developed method was convenient and accurate with good repeatability. 2)The K_cut/air values of the six monomer ester flavors in cut tobacco were negatively correlated with temperature. The prediction equations established on the basis of K_cut/air values in low-temperature regions could predict K_cut/air values that were difficult to determine in high-temperature regions. The relative errors between the actually determined and predicted K_cut/air values at 90-110 ℃ were between 1.04% and 5.32%, indicating good prediction performance. 3)The K_cut/air values could be used as a parameter for the release performance of monomer flavors in cut tobacco matrix to quantitatively characterize the differences in monomer flavor release behavior, and it provided a new strategy to study the release behavior of tobacco monomer flavors.