The Effect of Solvent Type and Roasting Processes on Physico-Chemical Properties of Tigernut (Cyperus esculentus L.) Tuber Oil

• Published in: Journal of Oleo Science Vol. 67; no. 7; pp. 823 - 828
• Main Authors: Aljuhaimi, Fahad, Ghafoor, Kashif, Özcan, Mehmet Musa, Miseckaite, Otilija, Babiker, Elfadıl E, Hussain, Shadzad
• Format: Journal Article
• Language: English; Japanese
• Published: Japan Japan Oil Chemists' Society 2018; Japan Science and Technology Agency
• Subjects: Alkanes; Chemical Phenomena; Chemical properties; Cooking; Cyperus - chemistry; Cyperus esculentus L; fatty acid; Hexanes; oil; Oleic acid; Oleic Acids - analysis; Oleic Acids - isolation & purification; Organic chemistry; physico-chemical properties; Plant Oils - chemistry; Plant Oils - isolation & purification; roasting; solvent types; Solvents; tigernut; Tocopherol; Tocopherols - analysis; Tocopherols - isolation & purification; tigernut; oil; physico-chemical properties; roasting; Cyperus esculentus L; fatty acid; tocopherol; solvent types
• ISSN: 1345-8957; 1347-3352
• DOI: 10.5650/jos.ess17281

In this study, physico-chemical properties of raw and roasted tigernut oils extracted by two different solvents were determined. Peroxide values of raw and roasted tigernut oils extracted by petroleum ether and n-hexane solvents changed between 0.83 and 0.91 meqO2/100g to 1.57 and 1.63 meqO2/100g, respectively. While oleic acid contents of raw tigernut oils extracted by petroleum ether and n-hexane are determined as 66.83 and 67.47%, oleic acid contents of roasted tigernut oils extracted by petroleum ether and n-hexane were determined as 67.08 and 68.16%, respectively. The highest δ-tocopherol content was found in raw tigernut oil extracted by petroleum ether (54.91 mg/100g), while the lowest level is determined in roasted tigernut oil by n-hexane (50.77 mg/100g). As a result, the fatty acid profiles of roasted tigernut oil extracted by n-hexane were higher compared to results of raw tigernut oils extracted by petroleum ether (p < 0.05).