Abstract

The kinetic reaction for changes in some essential mineral contents (iron, zinc, calcium, sodium, and copper) of silver carp canned in sunflower oil, soybean oil, olive oil, and brine as filling media was assessed after a short- (1year) and long-term storage (3, 5, and 7years). The mineral nutrition value of cans was also determined to take into account the changes in estimated daily intake (EDI) of elements during storage and then clustered by principal component analysis (PCA). Results revealed that the reduction of trace elements in brine was higher than in other filling media due to formation of insoluble metal hydroxide. No changes were detected in the mineral content of cans after 1-year storage in comparison to fresh cans, while the content and daily intake of zinc, iron, calcium, copper, and sodium were significantly decreased in all filling media after 3, 5, and 7years of storage. The first-order reaction model was detected for reduction of mineral contents in filling medium. Post-storage daily intake of iron, sodium, calcium, zinc, and copper was 0.06 up to 0.18, 1.9 up to 9.7, 1.8 up to 9.1, 0.02 up to 0.10, and 0.004 up to 0.02mg/day/person, respectively. Filling medium had significant effects on estimated daily intake of zinc, sodium, calcium, and copper in long-term sorted cans. PC1 and PC2 explained 93.7% of the total variance of the dataset, contributing 68.7 and 20.5%, respectively.

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