As the fruit and vegetable beverage market grows, a variety of foods are continually increasing. Therefore, when ingredients other than those indicated are added to achieve economic benefits, cases of adulteration and falsification concurrently follow. Among these, blueberry as expensive fruits, is one of the target for adulteration in juice production. This study was conducted based on the reports regarding the forgery of blueberry juice and grape juice; 32 kinds of blueberry juices, which are sold on the market, were collected and their metabolomics analysis was performed to screen out possible discriminants for blueberry juice adulteration. Metabolomes were extracted with 80% methanol and analyzed through LC-MS/MS followed by data processing with multivariate statistical analysis. Based on OPLS (orthogonal partial least squared) model, four metabolites were screened as significant discriminants among 209 metabolites found in blueberry juice and anthocyanin compounds occupied a main groups for discrimination. Marvidin-3-O-glucoside and cyanidin-3-O-rutinoside were identified as significant indicators for the existence of blueberry compared to grape juice which is main adulterates in blueberry juices. These candidates were assessed for monitoring commercial blueberry juices, which were proved as useful determinant for adulteration.

• Jin Young Lee(Department of Food Science and Technology, Chung-Ang University, Korea)
• Gyoung-Deuck Kim(Department of Food Science and Technology, Chung-Ang University, Korea)
• Chan Lee(Department of Food Science and Technology, Chung-Ang University, Korea)
• Joong-Hyuck Auh(Department of Food Science and Technology, Chung-Ang University, Korea)