M. P. de Siqueira-Moura, M. C. B. Lira and N. S. Santos-Magalhães 2008: Validação de método analítico espectrofotométrico UV para determinação de ácido úsnico em lipossomas [Validation of a UV-spectrophotometric analytical method for the determination of usnic acid in liposomes]. - Revista Brasileira de Ciências Farmacêuticas44(4): 621-628. [RLL List # 216 / Rec.# 30676] Keywords: USNIC ACID/ LIPOSOMES/ UV SPECTROSCOPY/ QUANTITATIVE ANALYSIS
Abstract: ["The content of usnic acid in liposomes was of 96% (± 0.2). The proposed method is accurate, precise and reproducible for estimation of usnic acid as raw material and in pharmaceutical dosage forms such as liposomes." In Portuguese with an English abstract.]