수-유기용매혼합용매중의 산-염기 지시약에 관한 연구

• 영문명: Behaviour of Acid-Base Indicators in the Aqueous Organic Solutions.
• 발행기관: 대한약학회
• 저자명: 용건호(Kun Ho Yong)
• 간행물 정보: 『약학회지』제19권 제1호 (1975년), 30~35쪽, 전체 6쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 1975.03.31

영문 초록

pKi values and sensitivity of acid-base indicators in the mixed solvent systems of water-alcohols and water-acetone at differential pH and in concentration media were determined by spectrophotometric method. When the concentration of the organic solvents were increased, the pKi values of sulfophthalein indicators, thymol blue and bromcresol purple, became larger whereas those of an azo indicator, methyl yellow, became smaller and the pH values of the equivalent points of acids became higher than those in the aqueous solution. Potassium bicarbonate, a standard compound used in acid-base titration, can be titrated with hydrochloric acid solution in the organic solvent systems without a prerequisite procedure of expelling carbon dioxide by boiling.