Essential elements in fresh and in canned onions
1979
Lopez, Anthony | Williams, H.L.
The content of 15 essential elements was determined in fresh and canned onions by atomic absorption spectrophotometry and the results were compared and analyzed statistically. Canned onions contained significantly higher amounts of chloride, cobalt, copper, iron, nickel, sodium, and tin than fresh onions. Fresh onions contained higher amounts of magnesium, phosphorus, and potassium than canned onions. No significant differences in manganese and zinc were found between the fresh and canned samples. The addition of calcium chloride to 7 canned samples produced a significantly higher calcium content in the processed samples. Element retention in the canned onions was at least 65% and in several instances over 100%.
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