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SIMCA analysis to distinguish pure AO from adulterated AO: The DModXPS+ diagram of pure AO (A,B), AO-SO (C,D), AO-CO (E,F) and AO-RO (G,H); the samples on the left (A,C,E,G) were used for calibration and the samples on the right (B,D,F,H) were used for validation; (I,J) show the specific discrimination results of calibration (I) and validation (J) in the form of confusion matrix.
