Antioxidative properties of Murraya koenigii leaf extracts in accelerated oxidation and deep-frying studies.
Murraya koenigii leaf extract antioxidant potentials were evaluated in palm olein using accelerated oxidation storage and deep-frying studies at 180 degrees C for up to 40 h. The extracts (0.2%) retarded oil oxidation and deterioration significantly (P<0.05), slightly less effectively than 0.02% butylated hydroxytoluene in tests such as the peroxide value, anisidine value, iodine value, free fatty acid, Oxidative Stability Index, and polar and polymer compound content. Sensory evaluation on French fries indicated that the extract was useful in improving colour, flavour and overall acceptability and the quality of the fried product. All samples were more acceptable by panellists, especially after the 40th hour frying, compared with those similarly fried in the control oils and the oil containing butylated hydroxytoluene. M. koenigii leaf extract, had a polyphenol content of 109.5+/-0.3 mg gallic acid equivalents/g extract, and contain a heat-stable antioxidant that could be a natural alternative to synthetic antioxidants for the industry.
Nor
Fatihanim Mohd
FM
Functional Food Laboratory, Faculty of Food Science and Technology, Universiti Putra Malaysia, Selangor, Serdang, Malaysia.
Suhaila
Mohamed
M
Aini
Idris Nor
IN
Razali
Ismail
I
D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D003116:Color; D003258:Consumer Behavior; D003296:Cooking / Q000379:methods*; D005504:Food Analysis; D006358:Hot Temperature; D006801:Humans; D032101:Murraya / Q000737:chemistry*; D019301:Oleic Acid / Q000378:metabolism; D010084:Oxidation-Reduction; D000073878:Palm Oil; D010936:Plant Extracts / Q000494:pharmacology; D018515:Plant Leaves / Q000737:chemistry; D010938:Plant Oils / Q000378:metabolism*; D035281:Plant Tubers / Q000378:metabolism; D011108:Polymers / Q000032:analysis; D059808:Polyphenols / Q000302:isolation & purification / Q000494:pharmacology*; D012016:Reference Values; D011198:Solanum tuberosum / Q000378:metabolism; D013649:Taste
D000975:Antioxidants; D010936:Plant Extracts; D010938:Plant Oils; D011108:Polymers; D059808:Polyphenols; D019301:Oleic Acid; D000073878:Palm Oil