Abstract
Montmorency sour cherry (Prunus cerasus L.) pit oil (CPO) was extracted and characterized by various methods including: GC, LC–MS, NMR, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and X-ray powder diffraction (XRD). The oil gave an acid value of 1.45 mg KOH/g, saponification value of 193 mg KOH/g and unsaponifiable matter content of 0.72 %. The oil contained oleic (O) and linoleic (l) acids as the major components with small concentrations of α-eleostearic acid (El, 9Z,11E,13E-octadecatrienoic acid) and saturated fatty acid palmitic (P) acid. The CPO contained six major triacyglycerols (TAG), OOO (16.83 %), OLO (16.64 %), LLO (13.20 %), OLP (7.25 %), OOP (6.49 %) and LElL (6.16 %) plus a number of other minor TAG. The TAG containing at least one saturated fatty acid constitute 33 % of the total. The polymorphic behavior of CPO as studied by DSC and XRD confirmed the presence of α, β′ and β crystal forms. The oxidative induction time of CPO was 30.3 min at 130 °C and the thermal decomposition temperature was 352 °C.
Original language | English (US) |
---|---|
Pages (from-to) | 995-1005 |
Number of pages | 11 |
Journal | JAOCS, Journal of the American Oil Chemists' Society |
Volume | 93 |
Issue number | 7 |
DOIs | |
State | Published - Jul 1 2016 |
Bibliographical note
Funding Information:This research was partially funded by the University of Minnesota's Undergraduate Research Opportunity Program. We acknowledge Dr. Ramesh Avula for the shipment of sour cherry pits from Cherry Central of Michigan.
Publisher Copyright:
© 2016, AOCS.
Keywords
- Eleostearic acid
- Fatty acids
- Oxidative stability
- Polymorphism
- Prunus cerasus L
- Sour cherry
- Thermal stability
- Triacylglycerol
- XRD