Trends in Purge and Trap

Abeel, Scott M.; Vickers, Allen K.; Decker, Daron

doi:10.1093/chromsci/32.8.328

Cited by 44 publications

(13 citation statements)

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“…Increases in sample sweep volume at constant ow rates as well as increases in temperature have been eectively used to increase the percentage recovery of semi-volatile components from such matrices as soil and water. 12 Obviously, increases in percentage recovery translate directly to more material transferred to the GC via the Tenax trap.…”

Section: Resultsmentioning

confidence: 99%

A Comparison of Selected Analytical Approaches to the Analysis of an Essential Oil

Coleman

Lawrence

1997

Flavour Fragr. J.

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Four gas chromatograph-based methods have been evaluated for their ability to provide qualitative and quantitative information on the characteristics of the components of the essential oil of Virginia cedarwood (Juniperus virginiana L.). Each method was found to possess certain strengths and limitations in providing the desired endpoints. Direct injection of solutions of the essential oil in an organic solvent provided very precise values for the percentage contribution. Solid-phase microextraction (SPME) employing a poly(dimethylsiloxane) ®bre provided information as to the distribution of major and minor volatile compounds in the headspace above the oil sample. Dynamic headspace analysis provided similar information, but both methods provided dierent perspectives on the constituency of the headspace. Gas-tight sampling of the headspace provided yet another viewpoint on the components in the headspace above the cedarwood oil. The exposure time of the ®bre in the SPME experiment and the sweep time of the dynamic headspace experiment were found to have a very signi®cant impact on the resulting distribution pro®le of the volatile compounds. Explanations as to the causes and implications of these results on the qualitative and quantitative analysis of essential oils were provided. Therefore, the desired analytical endpoint should dictate the type of gas chromatographic approach employed. For example, if information concerning the components responsible for the aroma of an essential oil is desired, then gas-tight sampling will provide a precise assessment of the distribution of those volatile components. On the other hand, dynamic headspace analysis and SPME will provide valuable qualitative information about all of the components of essential oils. Direct injection into a GC will provide the best quantitative information on the components of the essential oil. # 1997 by John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 99%

A Comparison of Selected Analytical Approaches to the Analysis of an Essential Oil

Coleman

Lawrence

1997

Flavour Fragr. J.

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“…The rest of esters were extracted in 20-30 min, that could be explained by their low boiling points and also by the absence of hydrogen bonding with water. Nevertheless, the decrease in the concentration of these esters at 40 min could be attributed to a purging volume higher than the breakthrough volume for these analytes [24,25]. Therefore, after the evaluation of the results, a purging time of 30 min was selected to optimize the method for the analysis of minor esters.…”

Section: Purge Timementioning

confidence: 99%

Application of purge and trap extraction and gas chromatography for determination of minor esters in cider

Madrera

García

Hevia

et al. 2005

Journal of Chromatography A

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The validation of a method based on the purge and trap technique combined with gas chromatography-mass spectrometry-flame ionization detection has been carried out in order to apply it to the analysis of ciders. Although 49 compounds were identified, our work was focused on the study of nine minor esters, obtaining recoveries ranging between 93% for ethyl decanoate and 117% for ethyl 3-methylbutyrate, and a precision (RSDs) ranging between 2.2% for hexyl acetate and ethyl decanoate and 10.9% for isopentyl acetate. To demonstrate the feasibility of the procedure, the method was applied to the analysis of commercial ciders.

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“…The so-called spray and trap method 19 has some advantages over the normally used purge and trap, 22 especially in the case of foaming samples. GC/ MS analysis is performed under the same conditions as described above.…”

Section: Field Analytical Chemistry and Technology -1996 79mentioning

confidence: 99%

Fast GC/MS field screening for excavation and bioremediation of contaminated soil

Matz

Schröder

1996

Field Analyt. Chem. Technol.

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Trends in Purge and Trap

Cited by 44 publications

References 0 publications

A Comparison of Selected Analytical Approaches to the Analysis of an Essential Oil

A Comparison of Selected Analytical Approaches to the Analysis of an Essential Oil

Application of purge and trap extraction and gas chromatography for determination of minor esters in cider

Fast GC/MS field screening for excavation and bioremediation of contaminated soil

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