Journal ArticleDOI
GC-MS study of compounds isolated from Coffea arabica flowers by different extraction techniques.
Elena E. Stashenko,Jairo René Martínez,Silvia Cárdenas-Vargas,Rogerio Saavedra-Barrera,Diego Camilo Durán +4 more
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TLDR
Hydrocarbons were the predominant compound class in all the sorptive extractions, followed by terpenoids or oxygenated compounds (which varied with the isolation technique).Abstract:
Headspace (HS), extractive, and distillative methods were employed to isolate volatile and semivolatile compounds from fresh Coffea arabica flowers. Static HS solid-phase microextraction (HS-SPME), microwave-assisted HS-SPME (MW-HS-SPME) with simultaneous hydrodistillation, and extraction with hexane or supercritical CO2 -isolated mixtures in which around 150 different chemical substances were identified or tentatively identified by GC-MS analysis. n-Pentadecane (20-37% relative peak area, RPA) was the most abundant compound in the HS fractions from fresh flowers, followed by 8-heptadecene (8-20% RPA) and geraniol (6-14% RPA). Hydrocarbons (mostly C13 -C30 paraffins) were the predominant compound class in all the sorptive extractions (HS-SPME, MW-HS-SPME, distillate), followed by terpenoids or oxygenated compounds (which varied with the isolation technique). Caffeine, a distinctive component of coffee fruits and beans, was also found in relatively high amounts in the supercritical CO2 extract of C. arabica flowers.read more
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Chemical immobilization of crosslinked polymeric ionic liquids on nitinol wires produces highly robust sorbent coatings for solid-phase microextraction.
Tien D. Ho,Bruna R. Toledo,Bruna R. Toledo,Leandro Wang Hantao,Leandro Wang Hantao,Jared L. Anderson +5 more
TL;DR: A series of demanding extraction conditions, including extreme pH, pre-exposure to pure organic solvents, and high temperatures, were applied to investigate the versatility and robustness of the fibers.
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Volatile Organic Compounds Emissions from Luculia pinceana Flower and Its Changes at Different Stages of Flower Development
TL;DR: Principal component analysis (PCA) indicated that the composition and its relative content of floral scent differed throughout the whole flower development, which has important implications for future floral fragrance breeding of Luculia.
Journal ArticleDOI
In vivo determination of the volatile metabolites of saprotroph fungi by comprehensive two-dimensional gas chromatography
Paula Feliciano de Lima,Paula Feliciano de Lima,Mayra Fontes Furlan,Mayra Fontes Furlan,Fabiana Alves de Lima Ribeiro,Fabiana Alves de Lima Ribeiro,Sérgio Florentino Pascholati,Fabio Augusto,Fabio Augusto +8 more
TL;DR: The use of multiway principal component analysis combined with comprehensive two-dimensional gas chromatography to study the volatile metabolites of the saprophytic fungus Memnoniella sp.
Journal ArticleDOI
Comprehensive two‐dimensional gas chromatography coupled with static headspace sampling to analyze volatile compounds: Application to almonds
TL;DR: The hyphenation of static headspace sampling with comprehensive 2D GC equipped with a modulator based on capillary flow technology and a flame ionization detector was used to separate and identify 43 representative target volatile compounds frequently detected in the roasting process of nuts.
Journal ArticleDOI
Tools in the Investigation of Volatile Semiochemicals on Insects: From Sampling to Statistical Analysis.
TL;DR: The application of statistical analysis provides tools for drawing conclusions about the type of correlations existing between the diverse experimental variables and data matrices, thus generating models that simplify the interpretation of the biological roles of VOCs.
References
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H. van Den Dool,P. Dec. Kratz +1 more
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Gas chromatographic retention indices of monoterpenes and sesquiterpenes on methyl silicon and Carbowax 20M phases
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Journal ArticleDOI
Diversity and Distribution of Floral Scent
TL;DR: It is concluded that floral scent chemistry is of little use for phylogenetic estimates above the genus level, whereas the distribution and combinations of floral scent compounds at species and subspecific levels is a promising field of investigation for the understanding of adaptations and evolutionary processes in angiosperms.
Journal ArticleDOI
Solvent-free microwave extraction of essential oil from aromatic herbs: comparison with conventional hydro-distillation
TL;DR: Solvent-free microwave extraction is a green technology and appears as a good alternative for the extraction of essential oils from aromatic plants and allows substantial savings of costs, in terms of time, energy and plant material.
Journal ArticleDOI
Solid-Phase Microextraction for Flavor Analysis
Xiaogen Yang,Terry L. Peppard +1 more
TL;DR: The application of solid phase microeffraction (SPME) for flavor analysis has been studied in this paper, where SPME headspace and liquid sampling were tested for 25 common flavor components in dilute aqueous solution.