Chemical Changes during rice storage at metal silo: fatty acid profile changes

Abstract

<div>ABSTRACT</div><div>Objective: To study the chemical changes of paddy stored at metal silo for a period of 6-month.</div><div>Methods: The peroxide value (PV) and free fatty acids (FFAs) were analyzed by titrimetry method. The total fatty acid profile was analyzed through</div><div>gas chromatography-mass spectrometry (GC-MS) (Scion 436-GC Bruker model coupled with a triple quadrupole mass spectrophotometer) and</div><div>National Institute Standard and Technology-MS library.</div><div>Results: The PV of paddy at the 1st month of storage is 0.62 mEq/kg and at the 6th month the value increases to 5.11 mEq/kg and initial FFA was</div><div>recorded as 0.49% and final value of 2.28%. In accordance with these data, the GC-MS study of rice bran oil (RBO) proved that polyunsaturated fatty</div><div>acid percentage is decreasing over the period of storage time.</div><div>Conclusion: With the results and findings, the overall chemical change during the 6-month storage of paddy at metal silo does not affect the RBO</div><div>quality significantly.</div

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