G. M. Ramos-Reyes, S. Corona-Avendaño, M. T. Ramírez-Silva, M. Romero-Romo, M. Palomar-Pardavé
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引用次数: 0
Abstract
Hydrocortisone is a glucocorticoid-type hormone produced naturally by the organism, such that it maintains the body functional during physical or mental stress episodes. The present work focuses on the UV-Vis spectrophotometric assessment of the chemical stability of hydrocortisone in an aqueous medium during the time of analysis, determination of its acidity constants through a robust methodology that involves the usage of SQUAD software and validation of an analytical method to determine hydrocortisone by means of UV-Vis spectrophotometry, in pharmaceuticals. The acidity constant was determined as pKa 11.45 ± 0.02 (298 K), and the molar absorptivity coefficients and the molar absorptivity coefficients of the species involved in this acidity equilibrium were also determined as a function of the wavelength. The analytical method developed attained detection and quantification limits of 386 ± 3 and 1280 ± 10 nM, respectively, whereas the validation allows reliable quantification of hydrocortisone in pharmaceuticals.
期刊介绍:
Journal of Applied Spectroscopy reports on many key applications of spectroscopy in chemistry, physics, metallurgy, and biology. An increasing number of papers focus on the theory of lasers, as well as the tremendous potential for the practical applications of lasers in numerous fields and industries.