Abstract
These studies were carried out to know the effects of washing treatment on the elution of mineral elements (iron, magnesium, calcium, copper, manganese, sodium and potassium) in fresh vegetables. The obtained results were as follows:
1) In generally, contents of copper, manganese and iron in chinese cabbage, spinach, sprouting bean, parsly, cabbage, sweet potato and taro were remarkably lower than tha other elements, but potassium contents in these vegetables was high clearly.
2) In the case of washing treatment by shake in the vessel, the elution of magnesium, sodium and calcium in chinese cabbage, spinach and cabbage were fairly high, and especially, high elution of most elements in sprouting bean was recognized.
3) There was no clear differences for elution of mineral elements between running water and water collected in the vessel.
4) The data presented here indicates that the elution of mineral elements continues with continuative washing treatment under the situation of overflow from the vessel.
5) While, the elution of mineral elements in taro was accelerated by washing blended with 10%salt, and that of sweet potato in rub washing by scrubbing-brush was increased with expansion of scratch.
