Details

Autor(en) / Beteiligte

• Stefanov, Ivan
• Baeten, Vincent
• Abbas, Ouissam
• Vlaeminck, Bruno
• De Baets, Bernard
• Fievez, Veerle

Titel

Evaluation of FT-NIR and ATR-FTIR Spectroscopy Techniques for Determination of Minor Odd- and Branched-Chain Saturated and trans Unsaturated Milk Fatty Acids

Ist Teil von

• Journal of agricultural and food chemistry, 2013-04, Vol.61 (14), p.3403-3413

Ort / Verlag

Washington, DC: American Chemical Society

Erscheinungsjahr

2013

Quelle

MEDLINE

Beschreibungen/Notizen

• Determination of nutritionally important trans MUFA, CLA, and OBCFA milk fatty acids (often present in amounts lower than 1.0 g/100 g of total fat) using fast and nondestructive analytical methods would enhance their use as diagnostic tools in dairy herd and human health management. Here, PLS regression using ATR/FTIR spectra indicated potential for determination of trans-11 C18:1 and trans-12 C18:1 (R cv 2 ≥ 0.80), and trans-9 C18:1 in very minor concentration (R cv 2 > 0.82), as well as anteiso C15:0 (R cv 2 = 0.57) and iso C17:0 (R cv 2 = 0.61). Furthermore, the main cis-9,trans-11 CLA isomer was predicted well despite the high trans MUFA concentration. Differentiation between the CLA and the trans MUFA signals was evident (based on specific cis/trans bands), and branched-chain saturated fatty acid methyl esters revealed specific iso and anteiso ATR/FTIR absorbance bands. None of the minor FA PLS results with FT-NIR showed interesting potential, except satisfactory predictions for trans-9 C18:1 and cis-9,trans-11 CLA. Overall, ATR/FTIR resulted in better calibrations and provided more specific information for determination of minor milk fatty acids.