Linked Life Data

11695519

Source:http://linkedlifedata.com/resource/pubmed/id/11695519

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
2001-11-6
pubmed:abstractText
The solid-liquid distribution coefficients of different analytes--all of which are important aroma compounds--between hydroalcoholic solutions or wines and different sorbents have been determined by measuring the amount of analyte removed by a given mass of sorbent in equilibrium with a given volume of standard solution. These data have shown that the best extraction conditions for non-polar compounds from wine are the use of Porapak-Q resins and 6% (v/v) alcoholic solutions. Phase ratio, hold-up volumes and number of plates for Porapak-Q beds have been measured in different experiments. With all these data it has been possible to calculate breakthrough volumes in good agreement with experimental results. The Lövkvist-Jönsson model is more appropriate for estimating breakthrough volumes of a 2-cm Porapak-Q bed. The model estimates that a 5-cm bed is needed to achieve a quantitative recovery of 3-alkyl-2-methoxypyrazines and beta-damascenone from 500 ml of wine (diluted to 1000 ml with water). Experimental results confirm the predictions of the model and show that in a single isolation step detection limits below 10 ng/l can be reached for these compounds using GC-MS detection.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0021-9673
pubmed:author
pubmed:issnType
Print
pubmed:day
5
pubmed:volume
931
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
31-9
pubmed:dateRevised
2009-1-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Use of solid-liquid distribution coefficients to determine retention properties of Porapak-Q resins. Determination of optimal conditions to isolate alkyl-methoxypyrazines and beta-damascenone from wine.
pubmed:affiliation
Department of Analytical Chemistry, Faculty of Sciences, University of Zaragoza, Spain.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't