<b>Identification of essential oil components by gas chromatography / mass spectroscopy</b> Robert P. Adams

Sparkman, O. David

doi:10.1016/s1044-0305(97)00026-3

Cited by 546 publications

(674 citation statements)

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“…Retention indices ( RI ) were calculated using the retention times of injected n ‐alkenes (C 6 – C 30 ) with the same experimental conditions. Compounds were identified by comparison of their RI with those reported in the literature, and their recorded mass spectra were matched with those stored in the NIST05 database through a G1701DA ChemStation ( Agilent , USA). Relative concentrations of components were calculated by the area normalization method without considering response factors.…”

Section: Methodsmentioning

confidence: 99%

Chemical Compositions and Antioxidant Activities of Essential Oils Extracted from the Petals of Three Wild Tree Peony Species and Eleven Cultivars

Zhang

Sun

Niu

et al. 2017

Chemistry & Biodiversity

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The aim of this study was to investigate the essential oil (EO) compositions and antioxidant activities from petals of three wild tree peony species (Paeonia delavayi, P. lutea, and P. rockii) and eleven P. suffruticosa cultivars from different cultivar groups. The EOs yields varied from 0.63% to 1.25% (v/v) among samples when using supercritical CO extraction. One hundred and sixty-three components were detected by GC/MS; and among them, linalool oxide, (Z)-5-dodecen-1-yl acetate, nonadecane, (Z)-5-nonadecene, heneicosane, phytol, and linoleic acid ethyl ester were dominant. According to hierarchical cluster analysis, principal component analysis and correspondence analysis, P. lutea, P. delavayi, and 'High Noon' were clustered in a group described as having a refreshing herbal-like note due to high rates of phytol and linalool oxide. Notably, P. lutea and P. delavayi also had strong DPPH and ABTS radical scavenging activities. These results suggest that P. lutea and P. delavayi are the most promising candidates as useful sources of fragrances and natural antioxidants.

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Section: Methodsmentioning

confidence: 99%

Chemical Compositions and Antioxidant Activities of Essential Oils Extracted from the Petals of Three Wild Tree Peony Species and Eleven Cultivars

Zhang

Sun

Niu

et al. 2017

Chemistry & Biodiversity

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“…Repeating from the review of the second edition [1]: "The collection of compounds of interest to the essential oil chemist that have been amassed for this work is outstanding; however, by the author's own admission, 'Unfortunately, several compounds are not in the [database] because we could not obtain authentic reference compounds.' Just as unfortunately, a list of these compounds is not included in the book."…”

Section: In the Preface To Identification Of Essential Oil Componentsmentioning

confidence: 99%

Identification of essential oil components by gas chromatography/quadrupole mass spectroscopy Robert P. Adams

Sparkman

2005

J. Am. Soc. Mass Spectrom.

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208

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In the Preface to Identification of Essential Oil Components by Gas Chromatography/Quadrupole Mass Spectroscopy[sic], Robert P. Adams, the author, states that he began research on essential oils in 1966. This may account for the reason that he persistently uses the term mass spectroscopy rather than mass spectrometry (Robert, there are no light bulbs inside those mass spectrometers). Again, as was the case with the second edition, there is no indication that this is a third edition; but, as in the second edition, the author clearly acknowledges this fact in the Preface.This edition has spectra for 1606 compounds. Adams takes some liberty in saying that this is 400 more than the previous edition, which actually had spectra for 1252 compounds. Because the spectra were acquired on an HP 5970 Mass Selective Detector (spectra in the previous editions were acquired using a Finnigan ITD-800 internal ionization quadrupole ion trap instrument), the display format of the spectra corresponds to that of the Agilent (formerly Hewlett-Packard) ChemStation mass spectral display rather than the Finnigan ITD-800 (now Thermo Electron). The ChemStation has the ordinate of the spectrum labeled in ion abundance rather than percent abundance or relative percent intensity. One of the curiosities of these spectra is that all exhibit exactly the same maximum abundance.As with the previous edition, each spectrum has a structure showing chirality were appropriate, retention time on a DB-5 column, and Kovat's index. Details are provided about the GC column and the operating conditions of the GC as well as the sample injected into the GC (volume, split ratio, and the internal standard used for retention time). The only important parameter missing from the operation of the mass spectrometer is the rate at which the data are acquired (the number of spectra per second). Another important factor would be the identification of the ChemStation version used.ChemStation has two very different versions of Autotune, and the only way to distinguish between which version was used is by the ChemStation version number. Adams states that data were acquired after using the instrument's "Autotune" to set the operating conditions.As was criticized in the review of the second edition, this book has some significant shortcomings in the brief text portion. They go beyond the criticism of calling a mass spectral peak an ion. In the discussion of whether or not mass spectra acquired with a quadrupole ion trap (QIT) and a transmission quadrupole are comparable, the author displays what he says are spectra of 3-methyl-4-heptone obtained on both instruments. The spectrum displayed that was reported to have been obtained on the transmission quadrupole is not that of 3-methyl-4-heptone but that of 2-methyl-4-heptone. The telltale peak at m/z 58, which is ϳ30% of the intensity of the peak at m/z 57 (the base peak), is the giveaway. This m/z 58 peak is obviously missing in the spectrum obtained with the QIT and is also missing from a spectrum for 3-methyl-4-heptone obtai...

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“…The identification of the essential oil constituents was accomplished by comparing retention indices from the literature data [30] and mass spectra by computer library search (HP Chemstation computer library NBS75K.L, NIST/EPA/NIH Mass Spectral Library 2.0 and Mass Finder 4 Computer Software and Terpenoids Library).…”

Section: Methodsmentioning

confidence: 99%

Effects of Different Methods of Isolation on Volatile Composition of Artemisia annua L.

Vidić

Čopra-Janićijević

Miloš

et al. 2018

International Journal of Analytical Chemistry

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In order to determine influence of extraction method on volatile oil composition of Artemisia annua L., steam distillation, hydrodistillation, organic solvent extraction, and headspace sampling have been applied. The relative abundance of volatile compounds from the odorous aerial parts of A. annua, obtained by different extraction techniques, was analyzed by GC-MS. Exactly fifty constituents were identified. The leaf and flower essential oil yield ranged from 0.9 to 2.3% (v/w). Oxygenated monoterpenes were predominant in all samples ranged from 42.6% for steam-distilled fraction of petroleum ether extract to 70.6% for headspace of plant material. Essential oils isolated by steam distillation and hydrodistillation indicate that A. annua belongs to artemisia ketone chemotype with its relative content of 30.2% and 28.3%, respectively. The principal constituent in headspace sample of plant material was also artemisia ketone (46.4%), while headspace of petroleum ether extract had camphene (25.6%) as the major compound. The results prove the combined approaches to be powerful for the analysis of complex herbal samples.

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Identification of essential oil components by gas chromatography / mass spectroscopy Robert P. Adams

Cited by 546 publications

References 0 publications

Chemical Compositions and Antioxidant Activities of Essential Oils Extracted from the Petals of Three Wild Tree Peony Species and Eleven Cultivars

Chemical Compositions and Antioxidant Activities of Essential Oils Extracted from the Petals of Three Wild Tree Peony Species and Eleven Cultivars

Identification of essential oil components by gas chromatography/quadrupole mass spectroscopy Robert P. Adams

Effects of Different Methods of Isolation on Volatile Composition of Artemisia annua L.

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