UV Spectrophotometric method for determination of posaconazole: comparison to HPLC

Abstract

The aim of this work was to develop a simple, fast and reproducible spectrophotometric method for the analysis of posaconazole in raw material. The established conditions were: methanol as extracting solvent, detection wavelength of 260 nm, Shimadzu double beam spectrophotometer 1800 model with 1 cm quartz cells. Linearity was demonstrated in the concentration range of 5.0 a 25.0 µg/mL (r = 0.9999). Reproducibility and intermediate precision were confirmed by low RSD values (0.49 to 0.82%). Accuracy, evaluated through recovery test, was adequate, with 98.20% of mean recovery. Specificity and robustness were also demonstrated. The mean amount found for samples was 100.82%. The proposed method was considered suitable for the intended purpose, mainly in routine analysis of quality control laboratories. When compared to the previously developed HPLC, no statistical difference was observed, what made the UV spectrophotometric method a reliable alternative.