Abstract: Luo han guo juice and a preparation method thereof. The method comprises: preparing fresh luo han guo fruits, and washing and grinding the same; adding a macerating enzyme; and performing enzymolysis under an ultra-high pressure of 120-220 MPa and maintaining the pressure for 10-15 minutes.

Abstract: The application provides a method for preparing rubusoside comprising steps of raw material crushing, flash extraction, double centrifugations, macroporous resin purification, desorption, enzymatic hydrolysis, organic film decoloring, concentration, crystallization and drying. The application optimizes the quality control of key process such as extraction, separation, purification and decolorization, and can obtain the rubusoside product with purity more than 99%, and the product is white, no bitterness, less solvent residue, no pesticide residue, and stable quality.

Abstract: The application provides a method for preparing betanin comprising steps of raw material crushing, flash extraction, double centrifugations, macroporous resin purification, desorption, enzymatic hydrolysis, organic film decoloring, concentration, crystallization and drying. The application optimizes the quality control of key process such as extraction, separation, purification and decolorization, and can obtain the betanin product with purity more than 99%, and the product is white, no bitterness, less solvent residue, no pesticide residue, and stable quality.

Abstract: The invention relates to a method for separating and purifying mogroside V by subcritical water desorption technology. The macroporous adsorption resin enriched with mogroside V is subjected to desorption under a subcritical condition of water using water as a solvent, to give an aqueous solution rich in mogroside V. The method not only improves the content of mogroside V in product, but also effectively removes bitter impurities and residual pesticides, greatly improves the taste adaptability of the product, and improves the safety and quality of the product. The method reduces the processing steps and reduces the use of organic solvents in the prior art, and reduces total production costs.

Abstract: A sweetener composition is provided, formed with natural plant extracts including Luo Han Guo fruit extract and sweet stevia extract, and neohesperidin dihydrochalcone (NHDC) as raw materials at a scientific and sound mixing ratio such that the disadvantage of having a strong aftertaste of water is eliminated, and the Chinese herbal medicine taste of the Luo Han Guo fruit and the bitter aftertaste of stevia sugar are effectively shielded. The sweetener composition successfully removes the Chinese herbal medicine taste of Luo Han Guo fruit and the bitter aftertaste of stevia sugar while fully exerting the herbal fresh and sweet taste of the Luo Han Guo fruit extract and the sweet stevia extract, and perfectly combines the sweet aftertaste of mogrosides, so that the sweet taste is maintained and the taste is good, and the sweetener composition of the present invention is well accepted by consumers.