The effects of microwave and ultrasound extracting methods on the main components of tea infusion were studied. The results showed that both methods had a better effect on the extraction of the main components of tea. The contents of tea polyphenols, amino acid and caffeine reached or exceeded those of normal extracting method. They had a retaining effect on the extraction of protein and pectin. The infusion color of tea liquor extracted by microwave method was better..
Main kinds of ...