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Sammanfattning

Natural fats and oils can be modified by various methods to prepare products with desired physical, chemical and nutritional properties. The enrichment and retention of the minor lipid components, the incorporation of capric acid and oxidative stability in low temperature fractionated rapeseed oil (RSO) in acetone were assessed in this study. The fractionated liquid part (L-RSO), the solid part (S-RSO) and the RSO were transesterified with capric acid (CA) at different mole ratios using lipase. The yields of L-RSO and S-RSO were 30 and 70 g per 100 g, respectively. The L-RSO contained higher levels of linoleic acid and linolenic acid, and a lower level of oleic acid compared to the S-RSO. The S-RSO contained a higher amount of total sterols than the RSO and the L-RSO. In contrast, the L-RSO contained a higher amount of total tocopherols than the RSO and the S-RSO. The incorporation of CA was ideal at a mole ratio of 1:3. The content of sterols and tocopherols gradually decreased with an increased mole ratio for the CA incorporation. The oxidative stability shown as onset temperature, determined by DSC, of the S-RSO was higher compared to those of the L-RSO and RSO.

Nyckelord

Differential scanning calorimetry; Lipase-catalyzed reaction; Oxidative stability; Rapeseed oil; Sterols; Tocopherols

Publicerad i

Grasas y Aceites
2013, volym: 64, nummer: 3, sidor: 264-271
Utgivare: INST GRASA SUS DERIVADOS

SLU författare

UKÄ forskningsämne

Analytisk kemi
Organisk kemi
Annan kemi

Publikationens identifierare

  • DOI: https://doi.org/10.3989/gya.107912

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/52328