alexa Sensitive and rapid HPLC quantification of tenofovir from hyaluronic acid-based nanomedicine.
Pharmaceutical Sciences

Pharmaceutical Sciences

Journal of Applied Pharmacy

Author(s): Agrahari V, Youan BB

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Abstract The purpose of this study was to develop and validate a rapid, sensitive, and specific reversed-phase high-performance liquid chromatography method for the quantitative determination of native tenofovir (TNF) for various applications. Different analytical performance parameters such as linearity, precision, accuracy, limit of quantification (LOQ), limit of detection (LOD), and robustness were determined according to International Conference on Harmonization (ICH) guidelines. A Bridge™ C18 column (150 × 4.6 mm, 5 μm) was used as stationary phase. The retention time of TNF was 1.54 ± 0.03 min (n = 6). The assay was linear over the concentration range of 0.1-10 μg/mL. The proposed method was sensitive with LOD and LOQ values equal to 50 and 100 ng/mL, respectively. The method was accurate with percent mean recovery from 95.41\% to 102.90\% and precise as percent RSD (relative standard deviation) values for intra-day, and inter-day precision were less than 2\%. This method was utilized for the estimation of molar absorptivity of TNF at 259 nm (ε(259) = 12,518 L/mol/cm), calculated from linear regression analysis. The method was applied for determination of percentage of encapsulation efficiency (22.93 ± 0.04\%), drug loading (12.25 ± 1.03\%), in vitro drug release profile in the presence of enzyme (43\% release in the first 3 h) and purification analysis of hyaluronic acid-based nanomedicine.
This article was published in AAPS PharmSciTech and referenced in Journal of Applied Pharmacy

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