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摘要
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 mu g mL(-1) (gallic acid) and 1.14 to 18.24 mu g mL(-1) (gallocatechin) was established. Intra- and inter-day precision levels were under 5%. LOD and LOQ were 0.231 and 0.770 mu g mL(-1) (gallic acid) and 0.151 and 0.504 mu g mL(-1) (gallocatechin), respectively. Determination of phenols was unaffected by product excipients.
- 出版日期2010
