| 摘要 |
A method of manufacturing a calcium aqueous solution by soaking marine shells in a sodium acetate solution and a sodium hydroxide solution and then heating is provided. A functional food is obtained by adding the calcium aqueous solution and prevents various diseases caused by calcium deficiency. Marine shells are soaked in turn in a sodium acetate solution and a sodium hydroxide solution for 2 to 4hhr, washed and heated at 800 to 1,300deg.C for 3 to 6hr. The calcium oxide powder obtained is mixed with water in a weight ratio of 1:3, agitated for 3 to 5hr in an agitating tank, neutralized with acetic acid or lactic acid to a pH of 6 to 8 and filtered. Then the calcium ionized water is mixed with edible water and sterilized. The functional food contains 0.5% by weight of the highly concentrated aqueous solution of calcium, based on the total weight of the food.
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