Sodium Isocyanate의 제법 및 Na2CO3, Urea, Biuret 혼재시 그의 정량분석법에 관한 연구

• 영문명: Preparation of Sodiumisocyanate and its Analyzing Method in the Presence of Impurities Na2CO3, Urea, and Biuret
• 발행기관: 대한약학회
• 저자명: 국채호(Che Ho Cook)
• 간행물 정보: 『약학회지』제7권 제2&3호 (1963년), 67~71쪽, 전체 5쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 1963.09.30

영문 초록

Studied the reaction mechanism and optimal reaction condition of the process of preparing sodium isocyanate, by means of heating reaction of sodium carbonate and urea. Proposing, at the sametime, the quantitative analyzing method of sodium isocyanate in the presence of impurities of Na2CO3, urea and biuret. 1. Sodium isocyanate could be prepared by means of heating reaction of sodium carbonate and urea. 2. Adding urea into the heated sodium carbonate is reasonable. 3. Quantitative analysis of sodium isocyanate in the presence of impurities, Na2CO3, urea and biuret could be done by the following method:-adding nitrobarite solution into sample solution in order to remove CO3" and neutralize the solution, filtering off BaCO3, and then precipitating isocyanate as a silver salt, filtering off AgNCO, and then, titrating remaining AgNO3 with NH4SCN, (indicator FeNH4(SO4)2)