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Solvent Extract (solvent + extract)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

Novel terpenyl esters from Australian finger lime (Citrus australasica) peel extract

FLAVOUR AND FRAGRANCE JOURNAL, Issue 3 2009
Estelle Delort
Abstract The volatile constituents of the peel solvent extract of the Australian finger lime Citrus australasica were analysed by GC,MS. Besides limonene, isomenthone was a major component, which is rare in Citrus species. Six new terpenyl esters were also identified and confirmed by chemical synthesis: citronellyl 2-methylbutanoate; 1,8(10)- p -menthadien-9-yl propanoate; 1,8(10)- p -menthadien-9-yl 2-methylbutanoate; 1,8(10)- p -menthadien-9-yl 3-methylbutanoate; 1- p -menthen-9-yl 2-methylbutanoate; and 1- p -menthen-9-yl 3-methylbutanoate. To the best of our knowledge, the last four compounds have never before been identified in a natural product extract. Copyright © 2009 John Wiley & Sons, Ltd. [source]

Essential oil compounds in a historical sample of marjoram (Origanum majorana L., Lamiaceae)

FLAVOUR AND FRAGRANCE JOURNAL, Issue 3 2002
Johannes Novak
Abstract A historical sample of marjoram (Origanum majorana L., Lamiaceae), more than 60 years old, was analysed and its composition compared to standard material from the European herb market. By using a solvent extract of the historical sample, the rearrangements and artefact formation usually occurring during the distillation of marjoram were avoided. The extract contained high amounts of terpinen-4-ol, thus resembling the distilled essential oil more than the solvent extract of the standard sample. So artefact formation in marjoram can also happen in planta in herbs stored for a long time under suboptimal conditions. The high content of carvacrol, normally never present in standard material from cultivation, gave an indication of the heterogeneity of marjoram in former times, and confirmed the opinion that (cultivated) marjoram is a chemovariety selected a long time ago. Copyright © 2002 John Wiley & Sons, Ltd. [source]

RP-HPTLC densitometric determination and validation of vanillin and related phenolic compounds in accelerated solvent extract of Vanilla planifolia,*

JOURNAL OF SEPARATION SCIENCE, JSS, Issue 18 2007
Upendra Kumar Sharma
Abstract A simple, fast and sensitive RP-HPTLC method is developed for simultaneous quantitative determination of vanillin and related phenolic compounds in ethanolic extracts of Vanilla planifolia pods. In addition to this, the applicability of accelerated solvent extraction (ASE) as an alternative to microwave-assisted extraction (MAE), ultrasound-assisted extraction (UAE) and Soxhlet extraction was also explored for the rapid extraction of phenolic compounds in vanilla pods. Good separation was achieved on aluminium plates precoated with silica gel RP-18 F254S in the mobile phase of methanol/water/isopropanol/acetic acid (30:65:2:3, by volume). The method showed good linearity, high precision and good recovery of compounds of interest. ASE showed good extraction efficiency in less time as compared to other techniques for all the phenolic compounds. The present method would be useful for analytical research and for routine analysis of vanilla extracts for their quality control. [source]

Combinatorial Synthesis by Nature: Volatile Organic Sulfur-Containing Constituents of Ruta chalepensis L.

CHEMISTRY & BIODIVERSITY, Issue 9 2006
Sina Escher
Abstract Ongoing interest in discovering new natural fragrance and flavor ingredients prompted us to examine a solvent extract of sulfurous-sweaty smelling Ruta chalepensis L. (Rutaceae) plant material more closely. Twenty-one sulfur-containing constituents of similar structures were identified by GC/MS techniques. Amongst them, 14 have never been described to occur in nature. The compounds 1,18 belong to a family of natural flavor and fragrance molecules having a 1,3-positioned O,S moiety in common. The identities of the natural constituents were confirmed by comparison with synthetic reference samples, and the organoleptic properties of the latter were studied. The relative and absolute configurations of the four stereoisomers of 4-methyl-3-sulfanylhexan-1-ol (5) were established by stereoselective synthesis. The natural isomers consisted of a 65,:,35 mixture of (3R,4S)- 5 and (3S,4S)- 5. [source]