Received: 25-07-2016
Accepted: 06-12-2016
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Effect of Processing Conditions on Extraction Yield of Corn Oil
,
Nguyen Thi Quyen
1
,
Nguyen Ngoc Cuong
2
Keywords
Corn oil, extraction yield
Abstract
The study was carried out on corn kernels withoil content of 3.36 - 5.73% on dry matter basis in order to select the most suitable variety for oil extraction. The main processing parameters were also examined in order to select the best values which enhance the extraction yield and thequality of the extracted oil. The optimized processing conditions are briefly described as follows. Corn kernels were ground to particle size of 0.1 mm to 0.25 mm in diameter. The ground corns were then extracted two times by n-hexane at a ratio of 1 g ground corn to 8 mL solvent for 5 hours (the first time) and ratio of 1 g ground corn to 4 mL solvent for 2 hours (the second time). Extraction was carried out at 69oC. The extract was then evaporated by rotary vacuum equipmentto collect corn oil. The corn oil obtained has high levels of unsaturated fatty acids and vitamin E, and can be used as raw material in the production of functional foods and pharmaceuticals.
References
Chien J. T and J. E. Hoff (1990). Oil Extraction of dried ground corn with ethanol. The chemical engineering journal, 43: 103 - 113.
Eqbal M. A. D., A.S. Halimah.,A. Aminah and M.K. Zalifah (2011). Fatty Acids Composition of four different Vegetable Oils (Red Palm Olein, Palm Olein, Corn oil and Coconut oil) by Gas Chromatography. 2nd International Conference on Chemistry and Chemical Engineering, IACSIT Press, Singapore.
Moreau, R.A and K.B. Hicks (2004). The in vitro Hydrolysis of Phytosterol Conjugates in Food Matrices by Mammalian Digestive Enzymes, Lipids, 39: 769 - 776.
Moreau R. A and K.B. Hicks (2005). The composition of corn oil Obtained by the Alcohol Extraction of Ground corn. JAOCS, 82: 809 - 815.
Nguyễn Hữu Tình (1997). Cây ngô. Nhà xuất bản Nông nghiệp, Hà nội, tr. 126.
Nguyễn Thị Thơm (2007). Luận văn tốt nghiệp: Quy trình công nghệ khai thác dầu hạt tía tô, Đại học Nông nghiệp Hà Nội.
Tiêu chuẩn Việt Nam (1989). Ngô - Phương pháp xác định hàm lượng ẩm (ngô bột, ngô hạt). TCVN 4846: 1989.
Tiêu chuẩn Việt Nam (2010). Dầu thực vật - Phương pháp xác định chỉ số peroxyt. TCVN 6121: 2010.
Tiêu chuẩn Việt Nam (2010). Dầu thực vật - Phương pháp xác định chỉ số axit. TCVN 6127: 2010.
Tiêu chuẩn Việt Nam (2013). Dầu thực vật. TCVN 7597: 2013.
Tiêu chuẩn Việt Nam (2013). Tinh bột và sản phẩm tinh bột - Xác định hàm lượng nitơ bằng phương pháp Kjeldahl. TCVN 9936: 2013 (ISSO 3188:2013).
Trần Thu Trà (2010). Công nghệ bảo quản và chế biến lương thực tập 1. Nhà xuất bản Đại học Quốc gia Thành phố Hồ Chí Minh.