Iranian Journal of Fisheries Sciences
مجله علوم شیلاتی ایران
IJFS
Agriculture
http://jifro.ir
1
admin
1562-2916
10.18869/acadpub.ijfs
en
jalali
1394
1
1
gregorian
2015
4
1
14
2
online
1
fulltext
en
The effects of refining steps on Kilka (Clupeonella delicatula) fish oil quality
Fish processing
Fish processing
پژوهشي
Orginal research papers
Kilka fish are known as the main industrial and pelagic species of Iran that are captured abundantly in the southern Caspian Sea. This study was conducted to survey the effectiveness of refinement steps on Kilka (Clupeonella delicatula) crude oil quality and fatty acid profiles. Neutralization, bleaching, winterization and deodorization were performed on crude oil with deodorization done under two different conditions of A: at 180˚C for 120 min and B: at 140˚C for 240 min. During refinement, peroxide value (PV) significantly decreased from 7.66 meq/kg in crude oil to 0.5 in deodorized oil A and to 0.21 in deodorized oil B (p<0.05). Significant reduction in free fatty acids (FFA) was recorded from 0.86% oleic acid in crude oil to 0.15% in deodorized oil A and to 0.33% in deodorized oil B (p<0.05). N-3 fatty acids content and fatty acids composition were determined by GC-FID and n-3 fatty acids content increased from 18.74% in crude oil to 21.58% in deodorized oil A and to 21.75% in deodorized oil B. The red color in oil significantly decreased from 5.4 to 0.4 and 0.5 in deodorized oil A and deodorized oil B, respectively (p<0.05). Results confirm that refinement steps improved oil quality and raised n-3 PUFA concentration and n-3/n-6, properly. Deodorization at 180˚C for 120 minutes (A) was more effective than deodorization at 140˚C for 240 minutes (B) in removing off flavors.
Clupeonella delicatula, Fish oil, Refinement, Deodorization, N-3 fatty acids, Oxidation
382
392
http://jifro.ir/browse.php?a_code=A-10-1268-2&slc_lang=en&sid=1
A.A
Motalebi Moghanjoghi
100319475328460013177
100319475328460013177
No
G
Hashemi
100319475328460013178
100319475328460013178
Yes
M
Mizani
100319475328460013179
100319475328460013179
No
M
Gharachorloo
Ghavamhashemi@yahoo.com
100319475328460013180
100319475328460013180
No
H.R
Tavakoli
100319475328460013181
100319475328460013181
No