| 摘要 |
PURPOSE:To obtain a drink having a beautiful color tone and good flavor, causing no turbid precipitate, by extracting a raw material for barley tea with an aqueous solution of a specific salt and ascorbic acid and incorporating the extracted solution with the salt and the acid to adjust to a given pH. CONSTITUTION:Sodium or potassium carbonate or phosphate and ascorbic acid are dissolved in water and adjusted to pH 6.0-7.0. The solution is heated to a given temperature, e.g., 90-100 deg.C, a raw material for barley tea is added to the solution, essence in the raw material is extracted and solid content is filtered off by using a filter cloth, etc. The extracted solution thus obtained has, as it is, drawbacks of discoloration and advance of variability of pH during preservation affected by oxygen in air and by heating sterilization, etc., carried out for long-term preservation. Therefore sodium or potassium carbonate or phosphate and ascorbic acid are redissolved in the extracted solution and adjusted to pH 6.0-7.0. |
