Studies on Drug Analysis by Metal Chelate Ion. I. Colorimetric Determination of Nicotinamide with Dimethyglyoxime-Fe (II)

금속 chelate ion에 의한 의약품 정량에 관한 연구(I) Dimethylglyoxime-Fe(II)에 의한 Nicotinamide의 비색정량

Nicotinamide Complex Compound was not formed in simple alkaline solution under two to one molar ratio of dimethyglyoxime and Fe (II), but it was formed with ammonia or pyridine under the same molar ratio. Based on this fact, nicotinamide solution was added into dimethyglyoxime-Fe (II) complex solution, and the chelation product was extracted with chloroform. The extraction was Completed in a range of pH 8.4-11.0. The chloroform solution shows stability and maximum absorption at 516 m${\mu}$.