Hot water extractions accompanied with and without ultrasonication were attempted during the heating process in the preparation of chicken-bone soup stock and the changes in the contents of 9 mineral components in the soup were investigated. In addition, the relationship between the mineral components of chicken-bone soup stock and taste components and optimum preparation conditions were examined
1) In the soup prepared by the method with ultrasonication, each content of 9 mineral components was higher than in the soup prepared without ultrasonication, indicating that the former soup was more nutrient as a natural food substance.
2) The extraction of mineral components increased dependently upon temperature for Ca, Mg and Na and upon time for P, K and Zn. Thus, the changes in extractable amounts were different among these mineral components.
3) For the treatment with ultrasonication at 98 °c for 30 minutes resulting in the best evaluation in the sensory test, the extracted amount was larger by 5-43% for Ca, Mg, P, Na and Fe, and nearly equal for K, Mn, Zn and Cu compared to the treatment without ultrasonication for 90 minutes. In addition, synergistic effects were found with taste components such as glu and 5'-IMP, indicating a close agreement with the results from the sensory evaluation.
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