Abstract: Nonlinear chemical fingerprint based on chemical oscillatory reaction is a novel technology to analyze samples from the nonlinear chemical viewpoint. Different kinds of tea beverages from different manufacturers were added to the steady system sodium bromate-manganese sulphate-sulphuric acid-acetone to obtain their nonlinear chemical fingerprints, and the similarity was calculated. Uni-President ice black tea could be differentiated from other tea beverages by the intuitionistic information, quantitative information, and similarity calculation. And the function between oscillatory life and determining dosage was good. The quality of the tea beverage was evaluated by comparing the nonlinear chemical fingerprint parameter information of the ice black tea with different amounts of adulterated water. Therefore, nonlinear chemical fingerprint can provide a novel strategy to identify and evaluate tea beverages.

Key words: tea beverages, identification and evaluation, chemical oscillatory reaction, nonlinear chemical fingerprint