Abstract
Total organic carbon (TOC) was measured in some kinds of mineral water, and the method was validated. In mineral water, there are many kinds of elements such as carbon dioxide and a wide range of hardness. The official method for amount of TOC in tap water was validated in non-carbonated mineral water regardless of the degree of hardness. However, the amount of TOC was not accurately measured in two kinds of carbonated mineral water with medium or high degree of hardness. In our method of this study, the removal of carbon dioxide from the two kinds of mineral water was achieved by making bubbling time longer and additive rate of HCl upper than the official condition of tap water. And then, the method we developed was validated in the two kinds of mineral water. Our results suggested that the method we developed could be useful to measure the amount of TOC in many kinds of mineral water on the market.
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