Identification of key odorants in complex mixtures occurring in nature. Issue 12 (21st July 2020)

• Record Type: Journal Article
• Authors: Baldovini, Nicolas; Chaintreau, Alain
• Is Part Of: Natural product reports. Volume 37:Issue 12(2020)
• Page Start: 1589
• Page End: 1626
• Publication Date: 2020-07-21
• Subjects: Natural products -- Periodicals; Produits naturels -- Périodiques; 547.7
• DOI: 10.1039/d0np00020e
• Languages: English
• ISSNs: 0265-0568

Abstract

Abstract : Here are reviewed the methods based on gas chromatography-olfactometry to identify natural key odorants, followed by an overview of the richness of Nature's olfactome through examples on the chemistry of wine and various other natural odorants. Abstract : Covering: up to 2019 Soon after the birth of gas chromatography, mass spectrometry and olfactometry were used as detectors, which allowed impressive development to be achieved in the area of odorant determinations. Since the mid-80s, structured methods of gas chromatography-olfactometry have appeared, allowing the determination of which odor constituents play a key role in materials. Progressively, numerous strategies have been proposed for sample preparation from raw materials, the representativeness evaluation of extracts, the identification of odor constituents, their quantification, and subsequently, the recombination of the key odorants to mimic the initial odor. However, the multiplicity of options at each stage of the analysis leads to a confusing landscape in this field, and thus, the present review aims at critically presenting the available options. For each step, the most frequently used alternatives are described, together with their strengths and weaknesses based on theoretical and experimental justifications according to the literature. These techniques are exemplified by many applications in the literature on aromas, fragrances and essential oils, with the initial focus on wine odorants, followed by a short overview on the molecular diversity of key odorants, which illustrates most of the facets and complexities of odor studies, including the issues raised by odorant interactions such as synergies.