초록 ▼

Green tea extracts having improved clarity and color. These extracts are obtained by treating the green tea extract with an amount of a food grade cation exchange resin effective to remove metal cations present in the extract. The treated extract is then contacted nanofiltration membrane while the t

Green tea extracts having improved clarity and color. These extracts are obtained by treating the green tea extract with an amount of a food grade cation exchange resin effective to remove metal cations present in the extract. The treated extract is then contacted nanofiltration membrane while the treated extract is at a temperature of from about 100.degree. to about 140.degree. F. (from about 37.8.degree. to about 60.degree. C.) to provide a filtered green tea extract as the permeate. These green tea extracts can be included in a variety of beverages and are especially useful in suppressing the characteristic aftertaste of aspartame in diet beverages.

대표청구항 ▼

[ What is claimed is:] [1.] A process for obtaining a green tea extract having improved clarity and color, which comprises the steps of:a. providing a green tea extract;b. treating the green tea extract with an amount of a food grade cation exchange material effective to remove metal cations present

[ What is claimed is:] [1.] A process for obtaining a green tea extract having improved clarity and color, which comprises the steps of:a. providing a green tea extract;b. treating the green tea extract with an amount of a food grade cation exchange material effective to remove metal cations present in the extract; andc. contacting the treated extract with a nanofiltration membrane while the treated extract is at a temperature of from about 100.degree.to about 140.degree. F. to provide an extract permeate having, on a 1% soluble solids basis:(1) a mixture of catechins comprising:(a) at least about 130 ppm of epicatechins;(b) at least about 300 ppm of epigallocatechins;(c) at least about 350 ppm of epigallocatechingallates;(d) at least about 60 ppm of epicatechingallates;(2) at least about 50 ppm of theanine;(3) about 10 ppm or less each of calcium, magnesium, manganese, aluminum, zinc and iron ions;(4) an absorbance of about 0.06 or less when measured at 600 nm.