|
KMID : 1171820090240010033
|
|
Journal of Environmental and Sanitary Engineering
2009 Volume.24 No. 1 p.33 ~ p.39
|
|
|
Effect of Metal ion on Rancidity of Crude Rapeseed Oil
|
|
Kim Youn-Soon
Kim Yoon-Soo
Nam Hyung-Gun
Seo Gwang-Yeob
|
|
|
Abstract
|
|
|
In order to investigate effect of metal ion and antioxidant on rancidity of crude rapeseed oil (CRO), Fe²?, Cu²?, Co²?, Ni²?, Cr²?, Sn²?, Mn²?, Zn²?, and antioxidants including BHA, Vitamin C, and Tocopherol were used. The specific gravity and refractive index of CRO were 0.92g/㎤ and 1.45,respectively.
The chromaticities of light, red, and yellow in CRO were 88.6 and 98.7, respectively. Among various fatty acids, Oleic acid (C18:1) concentration was highest, 62.3% and Linoleic acid (C18:2) concentration was 19.16%. In the case of Linolenic acid (C18:3) and Palmitic acid (C16:0), they were 9.88 and 5.2%, respectively. The concentrations of unsaturated fatty acids and saturated fatty acid were 92.2 and 7.8%, respectively. The degree of expediting rancidity of CRO was an order of Fe²?＞ Cu²?＞ Cr²?＞ Zn²?＞ Ni²?＞ Al²?＞ Mn²?＞ Mn²?＞ Sn²?＞ Co²?＞ Li²?. Especially, when Cu²? and Fe²? was used, the peroxide value concentration was about 4.0 fold higher than non addition of them. The inhibition effect of rancidity of CRO using antioxidant with Cu²? and Fe²? was an order of BHA＞ Vitamin C＞Tocopherol.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|