Abstract:Based on the method for high performance liquid chromatography analysis （HPLC）of organic acids in blueberry juice，the HPLC fingerprints of blueberry juices were developed by using the software of"Similarity Evaluation System for Chromatographic Fingerprints of Traditional Chinese Medicine（Version 2.0）".Moreover，similarity analysis，principal component analysis，and cluster analysis coupled to fingerprints were used to classification and discrimination the blueberry juices adulteration with apple juice，pear juice，apricot juice，peach juice，and exogenous citric acid.Results showed that the similarities among fingerprints of different blueberry juices were above 0.950，and the similarities between fingerprints of reference and blueberry juice samples were all above 0.978.The fingerprints of blueberry juices of different varieties and oringins showed a good consistency.Adulteration with apple juice，pear juice，apricot juice，peach juice and exogenous citric acid led to decreases of similarities.All the adulteration juice samples could be discriminated from blueberry juices by using the HPLC fingerprints combined with principal component analysis and cluster analysis，while only the high content of adulteration could be discriminated by similarity analysis.It was suggested that the blueberry juice adulteration with apple juice，pear juice，apricot juice，peach juice，and exogenous citric acid could be discriminated by HPLC fingerprints combined with chemometrics，which may be useful for the authentication and quality control of blueberry juice.