Abstract
A dissolution test was conducted on metallic and enameled tableware and cooking utensils in daily use. The quantity dissolved was measured using a flameless atomic absorption method and ICP emission analysis to examing the changes the quantity of material dissolving in accordance to different given dissolving conditions and repetitive dissolution, and the effect of dissolving quantity in connection to the surface conditions of materials tested was also studied. (1) The amount that dissolved from brand-new alumite bowls and enameled bowls showed significantly higher values than those bowls repetitively dissolved. The higher the dissolving temperature and the longer the dissolving time, the greater the amount dissolved. The amount dissolved in the refrigerated temperature range showed extremely low values. (2) Due to fine flaws on the surface, aluminum dissolution from enameled bowls increased in the order nylon scrubbing brush>cleanser>no flaws. Alumite bowls, however, were not susceptible to flaws under the conditions of daily use. (3) Among aluminum cooking utensils for boiling use, comparatively high aluminum dissolution was observed: 371.2μg/cm2/h for thick aluminum plated pots, and 85.7μg/cm2/h for pudding cups. (4) The quantity of silicon dissolved from enameled bowls was approximately at the same level as the quantity of aluminum dissolved, and time series change showed almost the same behavior as aluminum.
