A method for preparing lotus leaf extract with a high flavonoid content.

Abstract

OCR The process for preparing lotus leaf extract with a high flavonoid content begins with the preparation of... Fresh lotus leaves are dried in a hot air oven, then extracted with distilled water using a brewing machine. Espresso is brewed using an espresso machine, and the extract is then concentrated using a distillation apparatus. The extract was then processed using a rotary evaporator and dried using a freeze dryer. The extract will be in the form of a brown or dark brown powder.

Claims

OCR 10KL (04 / 06 / 2569) 1. A method for preparing lotus leaf extract with a high flavonoid content, consisting of the following steps: As follows: A. Take fresh lotus leaves of the Nelumbo nucifera Gaertn. species and clean them. Clean with clean water and air dry for 1-5 hours. Then cut into pieces measuring 3-10 centimeters. Bake in a hot air oven at 50-60 degrees Celsius for 12-24 hours. Then, coarsely grind it into pieces measuring 0.5 - 2 centimeters. B. Take 1-5 grams of dried, crushed lotus leaves and extract them using 0.5-2.5 liters of distilled water. Using an espresso machine, the coffee is brewed at a temperature of 60-80 degrees Celsius. C. Take the lotus leaf extract obtained from step B and further concentrate it using a machine. Distillation is performed using a rotary evaporator at a temperature of 60-70 degrees Celsius for 1-5 hours. Then, store the resulting solution in a freezer at -80 degrees Celsius until it freezes solid. Then, remove the solution... The frozen material is then dried using a freeze dryer at a temperature of -60 to -40 degrees Celsius. At degrees Celsius, the extract will be in the form of a brown or dark brown powder.