“…The previous researches confirmed that the grape skins contained a large amount of anthocyanins, and extraction of anthocyanins had become one of the alternative approaches to utilize the grape by‐products (Putnik et al., 2018). Currently, anthocyanins extraction from plant material using ultrasound‐assisted (Pinela et al., 2019), microwave‐assisted (Liu, Yang, Zhou, Wen, & Dong, 2019), enzymes‐assisted (Belle et al., 2018), and ultrahigh pressure‐assisted (Haining & Yongkun, 2017) were previously reported. Among above extraction methods, ultrasound‐assisted extraction (UAE) is a novel extraction technique, which has many merits in view of a higher yield, shorter extraction time, lower solvent consumption, temperature, and production cost in comparison to conventional solvent extraction (Pariyarath, Anal, & Sadiq, 2018).…”