Sains Malaysiana 37(4):  379-382(2008)

 

Physicochemical Properties of Malaysian Jatropha curcas Seed Oil

(Pencirian  Fizikokimia Minyak Biji Jatropha curcas Malaysia)

 

Jumat Salimon & Rozaini Abdullah

Oleochemistry Programme

School of Chemical Sciences and Food Technology

Faculty of Science and Technology, Universiti Kebangsaan Malaysia

43600 Bangi, Selangor D.E, Malaysia

 

Received: 18 February 2008 / Accepted: 18 March 2008

 

 

ABSTRACT

 

Jatropha curcas oil was extracted using n-hexane as solvent in the Soxhlet extraction method. The physicochemical properties of Malaysian Jatropha curcas oil were evaluated. The result showed that the Jatropha seeds consist of 60% (dry w/w) crude oil. The physicochemical properties showed that the seed oil contained low moisture level of 0.02±0.01%, acid value (1.50±0.07%), iodine value (91.70 ± 1.44 mg/g), peroxide value (0.66±0.04 miliequivalence/kg) and saponification value of 208.5±0.47 mg/g respectively. Gas chromatography analysis showed that oleic acid (46.00±0.19%) appears as dominant fatty acid in seed oil followed by linoleic acid (31.96±0.19%) and palmitic acid (13.89±0.06%).  High performance liquid chromatography (HPLC) results showed that the dominant triacylglycerols present were PLL (22.00%), POP(16.48%), 000(16.48%), 00L(16.23%) and OLL(13.00%).

 

Keywords:  Oleic oil; Jatropha curcas

 

ABSTRAK

 

Minyak Jatropha curcas diekstrak dengan pelarut heksana dengan menggunakan kaedah pengekstrakan Soxhlet. Pencirian fizikokimia minyak Jatropha curcas Malaysia telah dilakukan.  Hasil kajian menunjukkan minyak biji Jatropha mempunyai nilai kelembapan sebanyak 0.02±0.01%, nilai keasidan (1.50±0.07%), nilai iodin (91.70 ± 1.44 mg/g), nilai peroksida (0.66±0.04 militara/kg)  dan nilai penyabunan sebanyak 208.5±0.47 mg/g. Analisis kromatografi gas menunjukkan asid oleik (46.00±0.19%) merupakan asid lemak dominan diikuti oleh asid linoleik  (31.96±0.19%) dan asid palmitik (13.89±0.06%). Keputusan kromatograpi cecair prestasi tinggi (HPLC) menunjukkan triasilgliserol, TAG yang dominan adalah PLL (22.00%), POP(16.48%), 000(16.48%), 00L(16.23%) and OLL(13.00%).

 

Kata kunci: Jatropha curcas; minyak oleik

 

 

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