Chemical and sensory effects of the freezing process on the aroma profile of black truffles (Tuber melanosporum)

Culleré, Laura. (Universidad de Zaragoza) ; Ferreira, Vicente (Universidad de Zaragoza) ; Venturini, M.E. (Universidad de Zaragoza) ; Marco, P. (Universidad de Zaragoza) ; Blanco, Domingo (Universidad de Zaragoza)

Resumen: The aim of this work was to evaluate the effect of freezing black truffles (Tuber melanosporum) on their aroma both in sensory and chemical terms. The truffles were frozen at temperatures of -20 to -80 °C. Descriptive and discriminative sensory and chemical analyses, based on headspace solid phase microextraction followed by gas chromatography–mass spectrometry analysis (HS-SPME–GC–MS), were carried out after 1, 20, 40 and 60 days. Fifteen compounds with high aromatic potential in truffles were determined. Their selective ion peak areas were calculated, summed and expressed as percentage of active odour compound, in order to monitor changes in odour profile. The aroma of frozen truffles differed significantly from the aroma of fresh truffles. Volatile composition data revealed that T. melanosporum aromatic profile is deeply modified as a consequence of a freezing process. These aromatic changes could explain the loss of freshness observed in all frozen truffles. Methional and some phenols were suggested as markers of freezing time. Interestingly, 1-octen-3-one appeared as a general marker of freezing process.

Idioma: Inglés

DOI: 10.1016/j.foodchem.2012.08.030

Año: 2013

Publicado en: Food Chemistry 136, 2 (2013), 518-525
ISSN: 0308-8146

Factor impacto JCR: 3.259 (2013)

Categ. JCR: CHEMISTRY, APPLIED rank: 9 / 71 = 0.127 (2013) - Q1 - T1
Categ. JCR: FOOD SCIENCE & TECHNOLOGY rank: 10 / 122 = 0.082 (2013) - Q1 - T1
Categ. JCR: NUTRITION & DIETETICS rank: 22 / 79 = 0.278 (2013) - Q2 - T1

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Química Analítica (Dpto. Química Analítica)
Área (Departamento): Área Nutrición Bromatología (Dpto. Produc.Animal Cienc.Ali.)
Área (Departamento): Proy. investigación HTA (Dpto. Produc.Animal Cienc.Ali.)
Área (Departamento): Área Tecnología de Alimentos (Dpto. Produc.Animal Cienc.Ali.)