Document Detail


DETERMINING MILK ISOLATED AND CONJUGATED TRANS UNSATURATED FATTY ACIDS USING FOURIER TRANSFORM RAMAN SPECTROSCOPY.
MedLine Citation:
PMID:  22084940     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The feasibility of Raman spectroscopy in combination with partial least squares (PLS) regression for determination of individual or grouped trans monounsaturated fatty acids (trans MUFA) and conjugated linoleic acids (CLA) in milk fat is demonstrated using spectra obtained at two temperature conditions: room temperature and after freezing at -80oC. The PLS results displayed capability for direct semi-routine quantification of several individual CLA (cis-9, trans-11 & trans-10, cis-12 C18:2) and trans MUFA (trans-4 to -15 C18:1) in minor concentrations (below 1.0 g/100g of milk fat). Calibration models were based on reference data cross-correlation or determined by specific scattering signals in the Raman spectra. Distinct bands for trans MUFA (1674 cm-1) and CLA (1653 cm-1) from the trans isolated and cis, trans conjugated C=C bonds were identified, as well as original evidence for the temperature effect (new bands, peak shifts and higher intensities) on the Raman spectra of fatty acid methyl ester and triacylglyceride standards is supplied.
Authors:
Ivan Stefanov; Vincent Baeten; Ouissam Abbas; Ellen Colman; Bruno Vlaeminck; Bernard De Baets; Veerle Fievez
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-15
Journal Detail:
Title:  Journal of agricultural and food chemistry     Volume:  -     ISSN:  1520-5118     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0374755     Medline TA:  J Agric Food Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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