Research on the preparating technology condition of tea extraction

The experiment takes the green tea as the material prepare extraction adopting two technologies which are extraction with water and papayin. Through the single factor experiment and the orthogonal experiment, obtains the optimum condition for extracting green obtained tea by adding papayin as follows: 45 min, 50 ℃, pH7.0, the addtion of 3% papayin and the water is 60 times to the material. The extraction of tea polyphenol can amount to 181.720 mg/g, which is 47.6% higher than that obtains in the best technology of common practice extraction which is as follows: green tea(1 g) are extracted with 60 mL when its pH value is 5.5 at 40 ℃ water bath for 50 min, also the extraction of amino acid can amount to 0.522 mg/g which is 102.2% higher than that obtain in the best technology of common practice extraction. Thus it is feasibility to improve the extracting effeiency using papayin hydrolyzing tea in technology.