| Title: | "Multi-channel open tubular traps for headspace sampling, gas chromatographic fraction collection and olfactory assessment of milk volatiles" |
| Author(s): | Naude Y; van Aardt M; Rohwer ER; |
| Address: | "Department of Chemistry, University of Pretoria, Hatfield 0002, South Africa" |
| DOI: | 10.1016/j.chroma.2008.09.065 |
| ISSN/ISBN: | 1873-3778 (Electronic) 0021-9673 (Linking) |
| Abstract: | "A headspace sampling method is described for concentrating milk volatiles onto a multi-channel open tubular silicone rubber trap (MCT) for thermal desorption into a GC-FID. Sections of the chromatographic profile, single peaks or combinations of compounds are recaptured with secondary MCTs during a subsequent run. The recaptured aroma is released in a controlled manner by heating the MCT in a portable heating device. An aroma release window of several minutes allows up to six people the opportunity to sniff each aroma fraction more than once. Olfactory results suggest that a synergistic combination of 2-heptanone and 2-nonanone could be responsible for a pungent cheese, sour milk-like aroma. MCTs containing single components or fractions can be desorbed into a GC-MS for compound identification" |
| Keywords: | Animals Chemical Fractionation/*methods Gas Chromatography-Mass Spectrometry/*methods Ketones/*isolation & purification Milk/*chemistry Odorants/analysis Smell Volatile Organic Compounds/*isolation & purification; |
| Notes: | "MedlineNaude, Yvette van Aardt, Marleen Rohwer, Egmont Richard eng Research Support, Non-U.S. Gov't Netherlands 2008/10/22 J Chromatogr A. 2009 Apr 3; 1216(14):2798-804. doi: 10.1016/j.chroma.2008.09.065. Epub 2008 Sep 25" |
