Related Experiment Videos
Quantitative determination of phenol in ointments
American Journal of Hospital Pharmacy
|May 1, 1975
Summary
A new spectrophotometric method accurately quantifies phenol in ointments using 2,6-dibromoquinone-4-chloroimide. This assay is unaffected by common active ingredients like hydrocortisone and menthol.
Area of Science:
- Analytical Chemistry
- Pharmaceutical Analysis
Background:
- Accurate quantification of active pharmaceutical ingredients (APIs) is crucial for drug safety and efficacy.
- Phenol is a common ingredient in topical formulations, requiring reliable analytical methods for quality control.
Purpose of the Study:
- To develop and validate a quantitative spectrophotometric method for determining phenol content in ointments.
- To assess the method's accuracy and specificity in the presence of other common pharmaceutical ingredients.
Main Methods:
- The method involves reacting phenol with 2,6-dibromoquinone-4-chloroimide to form a blue indophenol complex.
- Spectrophotometric measurement of the indophenol complex at a specific wavelength.
- Validation of the method for accuracy and interference from hydrocortisone and menthol.
Main Results:
- The developed method provides accurate quantitative measurements of phenol.
- No significant interference was observed from hydrocortisone and menthol, indicating high specificity.
- The formation of a measurable blue indophenol allows for reliable spectrophotometric analysis.
Conclusions:
- A robust and accurate spectrophotometric assay for phenol in ointments has been established.
- The method is suitable for routine quality control of pharmaceutical formulations containing phenol.
- The assay's specificity ensures reliable results even in complex matrices.