title: In vivo measurement of flavour release from mixed phase gels.
abstract: Flavour release was investigated from pure gelatin, pure agarose and mixed gelatin-agarose gels, all containing 25% sucrose and flavoured with p-cymene, ethyl butyrate, pyrazine and ethanol. Gels were characterised by optical microscopy, and rheological techniques to determine phase separation, elastic modulus and melting temperature. Volatile release was measured by monitoring the four volatiles in the expired air from one individual eating the gels, using Atmospheric Pressure Chemical Ionisation-Mass Spectrometry. The release pattern of p-cymene was not affected by gel type. The release of ethanol, ethyl butyrate and pyrazine was affected to different extents by the matrix suggesting that both the properties of the volatile and the matrix determine volatile release in vivo.
authors.affiliation: Division of Food Sciences, Samworth Flavour Laboratory, University of Nottingham, Sutton Bonington Campus, LE12 5RD, Loughborough, UK. andy.taylor@nottingham.ac.uk
authors.forename: A J
authors.initials: AJ
authors.lastname: Taylor
authors.forename: S
authors.initials: S
authors.lastname: Besnard
authors.forename: M
authors.initials: M
authors.lastname: Puaud
authors.forename: R S
authors.initials: RS
authors.lastname: Linforth
mesh_terms: D005421:Flavoring Agents / Q000032:analysis* / Q000302:isolation & purification; D005504:Food Analysis / Q000379:methods; D005524:Food Technology; D005780:Gelatin; D005782:Gels; D013058:Mass Spectrometry / Q000379:methods; D008853:Microscopy; D012212:Rheology; D012685:Sepharose; D014835:Volatilization
chemical_list: D005421:Flavoring Agents; D005782:Gels; D005780:Gelatin; D012685:Sepharose