Details

Autor(en) / Beteiligte

• Vo, Tan Phat
• Tran, Ton Quoc Dao
• Vo, Le Thao Vy
• Nguyen, Tran Ha Phuong
• Nguyen, Vy Khang
• Dang, Thi Cam Tu
• Nguyen, Le Gia Kiet
• Chung, Thanh Quynh
• Nguyen, Dinh Quan

Titel

Optimization of ultrasonic-assisted extraction to attain tannins and flavonoids from spent tea leaves using natural deep eutectic solvents

Ist Teil von

• Chemical engineering communications, 2024-07, Vol.211 (7), p.974-985

Ort / Verlag

Philadelphia: Taylor & Francis

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Taylor & Francis

Beschreibungen/Notizen

• This research targeted recovering tannins and flavonoids from spent tea leaves using natural deep eutectic solvents (NADES) combined with ultrasonic-assisted extraction (UAE). NADES were produced by organic acids with choline chloride, polyols, and sugars, then the extraction performance of NADES was investigated. NADES from acetic acid-glycerol (NADES3) expressed the highest extraction efficiency of flavonoids and tannins. The single-factor experiments played a role in investigating the influence of UAE conditions on the extraction efficiency of tannins and flavonoids before the Box-Behnken design model was utilized to optimize the UAE processes. The optimum extraction efficiency of flavonoids and tannins was 20.4 mg RE/g db and 185.9 mg CE/g db, respectively, at 900 W of ultrasonic power, 41 mL/g of liquid-to-solid ratios, 69 °C, 20 min, and 10% of water content in NADES. After that, the biological activity of extracts acquired at optimal conditions was quantified. This research illustrates that NADES-based UAE is a green and sustainable method for efficiently recovering tannins and flavonoids from spent tea leaves.