Generation of saffron volatiles by thermal carotenoid degradation
Manuel Carmona1, Amaya Zalacain, M Rosario Salinas
1Catedra de Química Agrícola, ETSI Agrónomos, Universidad Castilla-La Mancha, E-02071 Albacete, Spain. Manuel.Carmona@uclm.es
Abstract:
Generation of volatiles by thermal treatments has been studied in saffron spice for two reasons: (a) to determine volatile profile changes during simulated aging processes and (b) to study the volatile generation pathway. During the aging process, while the amounts of C10 compounds such as safranal and HTCC increase, the amounts of C9 compounds such as isophorone and 2,6,6-trimethylcyclohexane-1,4-dione decrease. A new compound tentatively identified as 4,5,6,7-tetrahydro-7,7-dimethyl-5-oxo-3H-isobenzofuranone seems to play a very important role in the aging process. The importance of this compound, structurally similar to dihydroactindiolide, was also confirmed when the saffron volatile fraction was analyzed via the degradation of the linear chain of crocetin and crocetin esters and is reported for the first time in this paper. Thermal degradation studies of zeaxanthin, crocetin, and trans and cis crocetin esters isomers allowed us to propose different mechanisms which explain saffron volatile generation depending on the crocetin ester isomer structure.
More Related Videos
05:22Rapid Collection of Floral Fragrance Volatiles using a Headspace Volatile Collection Technique for GC-MS Thermal Desorption Sampling
Published on: December 10, 2019
07:58Non-invasive Assay for Chlorophyll Biosynthesis Kinetics Determination during Early Stages of Arabidopsis De-etiolation
Published on: January 12, 2024
Related Concept Videos
Oxidation of Alcohols
The process of oxidation in a chemical reaction is observed in any of the three forms:
Loss of Carboxy Group as CO2: Decarboxylation of β-Ketoacids
Thermal Sigmatropic Reactions: Overview
Sigmatropic shifts are classified based on an order term [i, j ], where i and j indicate the number of atoms across which each end of the σ bond migrates. Below are examples of a [3,3] sigmatropic shift in 1,5-hexadiene, referred to as...
Radical Autoxidation
Mass Spectrometry: Aromatic Compound Fragmentation
Loss of Carboxy Group as CO2: Decarboxylation of Malonic Acid Derivatives
