The Variation of Bioactive Components in Rosemary Extracts by Adding Organic Acid Synergists

摘要

A study to track and detect the variation of bioactive components in rosemary extraction solution and extracts, by adding organic acid synergists, such as citric acid, oxalic acid and tartaric acid, was performed using high performance liquid chromatography (HPLC). Ultrasound was also used to increase the extraction efficiency, improve the yields of rosemary extracts and shorten the extraction time. The experimental results showed that the content of the key bioactive component carnosic acid was easier to reduce during the storage of extraction solution and extracts, meanwhile, adding citric acid, oxalic acid and tartaric acid during the extraction could actually slow down the trend of the reduction of the bioactive components, especially for carnosic acid.