1964 年 84 巻 11 号 p. 1145-1147
Comparison was made between chelatometry and gravimetry for the determination of bismuth in pharmaceuticals. A more simpler, rapid, and accurate determination was found to be as follows: The sample taken as a×10-1g. is dissolved in nitric acid, the solution is diluted with water, and its pH is adjusted to 1-3 with sodium acetate. Bi3+ is titrated with standard solution of 0.05M sodium ethylenediaminetetraacetate, with xylenol orange as the indicator. This method seemed to give better results than by the traditional gravimetry.