Quantitative Identification of Adulterated Sichuan Pepper Powder by Near-Infrared Spectroscopy Coupled with Chemometrics

Figure 4

Prediction results for components of adulterated Sichuan pepper powder in prediction set using NIR spectroscopy.

(a) Forecast figure of Sichuan pepper powder content of prediction set

(b) Forecast figure of wheat bran content of prediction set

(c) Forecast figure of rice bran content of prediction set

(d) Forecast figure of corn flour content of prediction set

(e) Forecast figure of rosin powder content of prediction set