Properties of eight commercial licorice extracts used as a food additive (sweetener, listed in the List of Existing Food Additives in the Japanese Food Sanitation Law) were surveyed. Residue on ignition ranged from 0.3 to 12.4, and pH ranged from 4.1 to 6.8, amount of glycyrrhizin, which is the major component in licorice extract, ranged from 10.9 to 77.4, sodium ranged from 0.1 to 1.2, potassium ranged from 0.3 to 5.0, and ammonium nitrogen ranged from 0.03 to 2.5. These results indicated that various products were distributed on the market. Differences in the manufacturing process may contribute to the variations of product properties.
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