Article (Scientific journals)
Comparison of different injection modes in edible oil minor components analysis
Purcaro, Giorgia; Barp, L.; Conte, L.
2015In Journal of Separation Science, 38 (13), p. 2278-2285
Peer Reviewed verified by ORBi
 

Files


Full Text
43-JSS-2015 38 2278-2285-injector.pdf
Publisher postprint (3.03 MB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Byproducts; Injection modes; Minor components; On-column injector; Programmed-temperature vaporizer injection; Chromatography; Column chromatography; Esterification; Esters; Fatty acids; Gas chromatography; Ionization of gases; Oil shale; Oils and fats; Olive oil; Capillary gas chromatography; Fatty acid alkyl esters; Flame ionization detectors; Injection mode; Performance comparison; Programmed temperature vaporizer; Quality control; Article
Abstract :
[en] Waxes and fatty acid alkyl esters are minor components used as official parameters to control the authenticity and quality of a high-value olive oil product. A poor measurement can lead to a misleading classification of the oil. The official method requires their analysis together by capillary gas chromatography equipped with a flame ionization detector and an on-column injector to avoid discrimination and thermal degradation. The degradation can occur to a different extent if different (and not properly optimized) injectors are used. However, other injection techniques, such as programmed-temperature vaporizer, are much more versatile and more widespread. The aim of the present work was to compare the performance of a programmed-temperature vaporizer injector, in on-column and splitless mode, with the on-column injector to analyze alkyl esters and waxes. Discrimination among high-boiling compounds was evaluated, as well as the occurrence of thermal degradation, especially of sterols and diterpene alcohol (phytyl and geranylgeraniol) esters. A proper optimization of a programmed-temperature vaporizer injection, with particular attention to the liner selection, was proven to provide comparable results to the traditional on-column injection. A performance comparison was carried out both on standard mixtures and on real oil samples. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Disciplines :
Chemistry
Author, co-author :
Purcaro, Giorgia  ;  Université de Liège - ULiège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie des agro-biosystèmes
Barp, L.;  Dipartimento di Scienze degli Alimenti, Università di Udine, via Sondrio 2A, Udine, 33100, Italy
Conte, L.;  Dipartimento di Scienze degli Alimenti, Università di Udine, via Sondrio 2A, Udine, 33100, Italy
Language :
English
Title :
Comparison of different injection modes in edible oil minor components analysis
Publication date :
2015
Journal title :
Journal of Separation Science
ISSN :
1615-9306
eISSN :
1615-9314
Publisher :
Wiley-VCH Verlag
Volume :
38
Issue :
13
Pages :
2278-2285
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 17 January 2019

Statistics


Number of views
27 (0 by ULiège)
Number of downloads
0 (0 by ULiège)

Scopus citations®
 
5
Scopus citations®
without self-citations
5
OpenCitations
 
4

Bibliography


Similar publications



Contact ORBi