keywords: Blanching, oxalate, phytate, vegetables, antinutrients, titrimetric
The effect of blanching time on the oxalate and phytate content of five non-conventional green leafy vegetables consumed in Benue State, Nigeria, was investigated. Titrimetric analysis was employed to determine the levels of oxalate and phytate in Justicia schimperi (Abushi), Hibiscus sabdariffa (Ashwe), Fiscus sur (“Tur”), Cucurbita spp (“Furum”) and Ocimumgratissimum (“Kunguleku-Utamen”) before and after blanching. The oxalate content of unblanched and blanched samples were compared. The results revealed that the oxalate content of all the studied vegetables decreased with increase in blanching time. The maximum level of oxalate was observed in Hibiscus sabdariffa (2189 mg/100g) while the minimum level of oxalate was observed in Ficus Sur
Agbaire PO 2011. Nutritional and anti-nutritional levels of some local vegetables (Vernonia amygdalina, Manihot esculenta, Teiferiaoccidentalis, Taliumtriangulare, Amaranthus spinosus) from Delta State, Nigeria. J. Appl. Sci. and Envtal. Mgt., 15(4): 625-628. Agbaire PO 2012. Levels of anti-nutritional factors in some common leafy edible vegetables of Southern Nigeria. Afri. J. Food Sci. and Techn., 3(4): 99-101. Al-Wahsh IA, Wu Y & Liebman M 2012A comparison of two extraction methods for food oxalate assessment. J. Food Res., 1(2): 233. Day RA & Underwood AL 1986. Quantitative Analysis 5th ed. Prentice. Hall Publication, p. 701. Joao SO 2012. Nutritional Quality and health benefits of vegetables. J. Food and Nutr. Sci., 2(3): 1354-1374. Kumar RV 1992. Antinutritional factors, the potential risks of toxicity and methods to alleviate them. In: Speedy, A and Puglise, P (eds). Proceedings of the FAO Expert Consultation held at the Malaysian Agricultural Research and Development Institute (MARDI) in Kuala Lumpur, Malaysia, 14-18 October, 1991. Nkafamiya II, Osemeahon SA, Modibbo UU & Aminu A 2010. Nutritional Status of non-conventional leafy vegetables, Ficusasperifolia and Ficussycomorus. Afri. J. Food Sci., 4(3): 102-108. Nupo SS, Onigbogi IO, Akinlotan JV & Ilori OA 2013. Effect of different processing methods on the nutrients and anti-nutrients composition of Seneciobiafrae, Crassocephalumcrepidiodiodes and Solanum nigrum consumed in South West Nigeria. Am. J. Food and Nutr., 3(3); 147-154. Radek M & Savage GP 2008. Oxalate in some Indian leafy vegetables. Int. J. Food Sci. and Nutri., 3(4): 275-279. Ramiel N 2010. Living with Phytic Acid http://www.westonaprice.org/health-topics/living-with-phytic-acid/ retrieved 20 October, 2015. Santosh K, Richard K & Owusu A 2015. Antinutritional factors in food legumes and effects of processing. The role of food, agriculture, forestry and fisheries in human nutrition. Encyclopedia of Life Support Systems, 6: 18.