Article

Headspace sampling of the volatile fraction of vegetable matrices.

Dipartimento di Scienza e Tecnologia del Farmaco, Via Pietro Giuria 9, I-10125 Torino, Italy.
Journal of Chromatography (impact factor: 4.53). 04/2008; 1184(1-2):220-33. DOI:10.1016/j.chroma.2007.06.019 pp.220-33
Source: PubMed

ABSTRACT The evolution of vapour phase sampling of the volatile fraction of vegetable matrices, or of products directly related to them, over the period 1996-2007 is reviewed. High concentration capacity headspace (HCC-HS) and dynamic headspace (D-HS) techniques, that is headspace sampling approaches where the analytes in the vapour phase are concentrated into a sorbent, an adsorbent or a solvent, are considered. Advantages, disadvantages and applications to the vegetable field of several successful techniques based on these approaches are critically presented, including in-tube sorptive extraction (INCAT, HS-SPDE), headspace sorptive extraction (HSSE), solid-phase aroma concentrate extraction (SPACE), large surface area HCC-HS sampling (MESI, MME, HS-STE), headspace liquid-phase microextraction (HS-LPME) and dynamic headspace samplings (D-HS). The developments necessary to overcome some of the limits of the above approaches and techniques are also discussed in view of their application to new fields.

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    Article: ECO-FRIENDLY TECHNIQUE FOR TOMATOES VOLATILE FINGERPRINT DETERMINATION
    Socaci A Sonia, Maria Tofană, Carmen Socaciu, Crina Mureşan, Elena Mudura, Adela Pintea, Adriana Păucean, Simona Vicaş
    [show abstract] [hide abstract]
    ABSTRACT: In-tube extraction (ITEX) is a novel technique that can be coupled with gas-chromatography mass-spectrometry (GC-MS) and used for the extraction and separation of volatile compounds from different matrices. In this study a simple and efficient ITEX/GC-MS method was developed and optimized for the extraction and analysis of volatile compounds from tomatoes. The analytes were extracted from sample headspace by dynamic extraction and trapped into the selected sorbent material (Tenax TA), followed by their thermal desorption into the GC injector. Different extraction parameters were tested (incubation time and temperature, amount of sample, number of pumping strokes) and the optimal ones selected. The best compromised between the extraction performance and analysis time was achieved when 1g of sample was incubated at 70 o C for 20 min. followed by 30 extraction strokes. Between the main odor-active volatiles found in the analyzed cherry variety tomato samples were: hexanal, trans-2-hexenal, cis-3-hexenol, hexanol, 6-methyl-5-hepten-2-one, 2-and 3-methylbutanal, methyl salicylate, 1-penten-3-one.
    Analele Universităţii din Oradea, Fascicula Protecţia Mediului. 11/2012;
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Keywords

analytes
 
concentration capacity headspace
 
developments necessary
 
disadvantages
 
dynamic headspace
 
dynamic headspace samplings
 
HCC-HS
 
headspace liquid-phase microextraction
 
headspace sampling approaches
 
headspace sorptive extraction
 
in-tube sorptive extraction
 
large surface area HCC-HS sampling
 
new fields
 
solvent
 
successful techniques
 
vapour phase
 
vapour phase sampling
 
vegetable field
 
vegetable matrices
 
volatile fraction