Research Article

Optimization Conditions of Ultrasound-Assisted Extraction for Phenolic Compounds and Antioxidant Activity from Rubus alceifolius Poir Leaves

Figure 1

Total polyphenol content (TPC) (mg GAE/g powder) and ABTS of rubus alceifolius Poir extracted with 70% ethanol at (a) given extraction temperature (45°C) and extraction time (35 min); (b) given ultrasonic power (300 W) and extraction time (35 min); and (c) given ultrasonic power (300 W) and extraction temperature (45°C).
(a)
(b)
(c)