Study On Processing Technology Of Hawthorn Leaves Tea

Hawthorn leaves have abundant of nutritional and medical value as the leaves of hawthorn plant.Hawthorn leaves are beneficial to human health,which have the function of antibacterial,anti-inflammatory,antioxidant,fall blood pressure,fall hematic fat,dilating blood vessels,improving the microcirculation and so on.There are amounts of phenols,protein,polysaccharide,flavonoid compounds,vitamins and pectin,which are the main pharmacological active ingredients of hawthorn leaves.Making full use of the hawthorn leaves by making hawthorn leaves tea can realize the high value utilization and increase the use value of the hawthorn leaves.The study chose the hawthorn leaves of Lai Wu as the material in the experiment to make hawthorn leaves tea,The harvest period and main technology were investigated during the process of making tea.The main research results were as follows:1.Measuring the contents of chemical components and sensory quality in hawthorn leaves from different months showed that the effect of harvest time on the sensory quality of hawthorn leaves was significant and the optimal harvest time of hawthorn leaves was in April and May.2.Measuring the physical and chemical components that included water extract,flavonoids,polysaccharide and protein and sensory evaluation in hawthorn leaves tea with different treatment of withering time.The results showed that optimum withering time of hawthorn leaves was 3 h.3.The different fixing methods which contained steam heating,heating,microwave heating and blanching pan fried wrap on the major components,sensory evaluation of hawthorn leaves tea were discussed.It showed that microwave heating was determined as the optimal fixing method.Then the optimal conditions of microwave heating were studied: time 60 s,power 616 W,volume for casting leaves 2.5 g/cm2.4.By comparing the physical and chemical components and sensory evaluation in hawthorn leaves tea by drying with hot air and microwave,the microwave drying was the optimal drying method.The optimal conditions of microwave drying were as follows: microwave power 616 W,average thickness 1 cm,drying time 9 min.