電子天秤によるビタミンCの簡易定量法の教材開発

抄録

The iodine content of a gargle solution sold at a market was obtained by the titration of a standard solution of vitamin C using a plastic bottle called ‘tarebin’; the gargle solution was then used to analyze the vitamin C content of some drinks and citrus fruits in the same way. The amount of the solution consumed for equivalence was measured quantitatively using an electronic balance and the vitamin C content of the drinks or citrus fruits was obtained without a burette and a measuring cylinder. Experimental results with satisfactory precision were obtained in classes, not only at University, but also junior high-schools.