RESEARCH ON THE FACTORS AFFECTING THE PRODUCTION OF STEVIA – PERILLA LEAVES INSTANT TEA POWDER

Abstract

This research was conducted to create a high-quality stevia – perilla soluble tea powder product that contains many biologically active substances beneficial to consumers' health and convenient to use. The process is carried out as follows: After being harvested, stevia leaves and perilla leaves are dried at 80oC for 2 hours (moisture to 5-7%), and then crushed to a size of 0.5-0.6 cm. Mix stevia and perilla leaf in a ratio of 0.25-1(g/g). Next, extract the tea solution at a temperature of 70oC for 2 hours, the ratio of ingredients: water is 1:30 (g/ml) and add 10% maltodextrin as a drying aid. Proceed with spray drying at a temperature of 170oC with input pump speed 30% gives a product in the form of a fine, uniform, lump-free powder, cream-colored tea powder, with the characteristic aroma of perilla leaves and the gentle sweetness of stevia, the tea powder has a moisture content of 4.75% and a polyphenol content of 9.16% dry matter. The stevia - perilla leaf soluble instant tea powder product has good quality and solubility.