Eisei kagaku
Print ISSN : 0013-273X
Spectrophotometric Method for Determination of N-Acetyl-p-aminophenol in Antipyretic Analgesics. (II).
Akio TsujiMasami Hojyo
Author information
JOURNAL FREE ACCESS

1964 Volume 10 Issue 4 Pages 241-246

Details
Abstract
Spectrophotometric methods for determination of N-Acetyl-p-aminophenol (NAAP) in pharmaceutical preparations are described. NAAP was hydrolysed by refluxing with HCl to produce p-aminophenol which reacts with Na3 [Fe (CN)5NH3] in alkaline solution to give a blue-green color (λmax : 700 mμ), or condenses with phenol in alkaline solution to produce a blue indophenol dye (λmax : 620 mμ). NAAP in pharmaceutical preparations could be determined by these methods within a standard deviation of ±0.6%. Influences of about forty compounds, which are used with NAAP, were examined. Sulpyrine interferes this method but its interference can be eliminated by using the standard solution containing the same amount of sulpyrine.
Content from these authors
© The Pharmaceutical Society of Japan
Previous article Next article
feedback
Top