Copper induced lipid oxidation during salting of cod (Gadus morhua

• Main Authors: Kristin Lauritzsen, Gustav Martinsen, Ragnar L. Olsen
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1999
• Subjects: Gadus morhua
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.551.6886; http://munin.uit.no/bitstream/handle/10037/1819/paper_4.pdf;jsessionid=F8DB3B8FA612B5009E7105F097A10032?sequence=2

Yeltowhrown discoloration of the muscle suflace was investigated in downgraded heavily salted codfillets fiom a processing plant. The results showed that discolored areas were relatively evenly distributed on the muscle stiflace and that lipid oxidation correlated with the copper and not the iron content, in the muscle. A model system for studying lipid oxidation and yellow discoloration of salted cod muscle was established and used for investigating the effect of including transition metals in the process. The model system confirms that copper is particularly pro-oxidative. Of the redox states, the reduced form of copper was most potent. i t appears that copper concentrates in the muscle during the brining. The results also indicate that copper induced lipid oxidation was increased by low pH of the fish muscle postmortem. The model system seems well suited for detailed studies of the saltingpmcess and may be useful for developing methods which can inhibit lipid oxidation in saltedproducts.