Resumen

ISLER, Ana Cristina et al. Development and validation of a LC-method for the determination of phenols in a pharmaceutical formulation containing extracts from Stryphnodendron adstringens. Quím. Nova [online]. 2010, vol.33, n.5, pp. 1126-1129. ISSN 0100-4042.  http://dx.doi.org/10.1590/S0100-40422010000500023.

A sensitive RP-HPLC method with UV detection successfully measured phenol(s) in an ointment containing 3% Stryphnodendron adstringens extract. Chromatography used acetonitrile (0.05% trifluoroacetic acid):water (0.05% trifluoroacetic acid) (v/v), flow rate 0.8 mL min^-1. Quantitation was accomplished by the external-standard method. Linearity for 2.00 to 16.00 μg mL^-1 (gallic acid) and 1.14 to 18.24 μg mL^-1 (gallocatechin) was established. Intra- and inter-day precision levels were under 5%. LOD and LOQ were 0.231 and 0.770 μg mL^-1 (gallic acid) and 0.151 and 0.504 μg mL^-1 (gallocatechin), respectively. Determination of phenols was unaffected by product excipients.

Palabras llave : Stryphnodendron adstringens; HPLC; method validation.