The objective of this study is to evaluate the chemical compounds present in the Malabar tamarind seed oil. The oil was extracted from the seeds of Malabar tamarind fruits collected from NBPGR Regional station, Thrissur. The seeds yielded 46.5 % of oil. Parameters such as the peroxide value, iodine value, saponification value, and acid value of the extracted Malabar tamarind seed oil were determined. These values were used to predict the quality of fatty acid methyl esters present in the oil. UV absorption spectroscopy of the oil showed hypsochromic shift, and the maximum absorbance was at 269 nm. The Fourier Transform Infrared Spectrum revealed the presence of olefin hydrogen and carbonyl group of ester compounds in the oil sample. The evaluation of the chemical compounds in the oil using gas chromatography coupled with mass spectrometry (GC-MS) revealed that, a total of five fatty acid methyl esters were present in the oil sample. Among the five fatty acid esters present in the Malabar tamarind seed oil, Methyl 16-methyl heptadecanoate (54.57 %) was found to be the predominant compound. This study also supports the presence of olefins in the long chain fatty acids from Nuclear Magnetic Resonance (NMR) data. There is a significant correlation between the properties and the characteristic profile of the oil sample. This study is the first report that shows Malabar tamarind as a promising source of oil seeds.
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Authors thank the Director, NBPGR, New Delhi and NBPGR Regional station, Thrissur for providing the Garcinia cambogia fruit samples for our studies and SIF VIT-DST-FIST, VIT University for providing GC-MS analysis and NMR spectroscopy instrumentation facilities.
1. This study is a first report for the Malabar tamarind seed oil profiling.
2. GC-MS of seed oil revealed the presence of saturated and unsaturated fatty acid methyl esters
3. Methyl 16-methyl heptadecanoate (ester of margaric acid) was the predominant compound.
4. Oleic acid is the second most abundant fatty acid (39 %) next to margaric acid.
4. NMR studies revealed the presence of olefins in the long chain fatty acids.
5. Malabar tamarind seed is one of the viable sources for oil production.
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Choppa, T., Selvaraj, C.I. & Zachariah, A. Evaluation and Characterization of Malabar Tamarind [Garcinia cambogia (Gaertn.) Desr.] Seed Oil. J Food Sci Technol 52, 5906–5913 (2015). https://doi.org/10.1007/s13197-014-1674-2
- Malabar tamarind
- Gas chromatography
- Seed oil
- NMR spectroscopy
- Garcinia cambogia