Abstract:

The phenolic compounds in North Shaanxi red jujube were extracted by ultrasonic wave, Soxhlet backflow and extraction, respectively. Then the contents of phenolic compounds were detected by UV spectrophotometry at different wavelengths. The results showed that there were good linear relationships between eight phenolic compounds (except gallic acid) and their absorbance, when the concentrations of 8 phenolic compounds were from 0.002 to 0.010 mg/mL. The correlation coefficients (r2) were between 0.9954-0.9998, the average recovery was 99.30% and the RSD was 1.87% when catechin was as the control. The contents of catechin and epicatechin accounted for up to 55%. This method was simple, accurate and suitable for detecting phenolic compounds in North Shaanxi red jujube.