Simultaneous Recognition of Species, Quality Grades, and Multivariate Calibration of Antioxidant Activities for 12 Famous Green Teas Using Mid- and Near-Infrared Spectroscopy Coupled with Chemometrics

Figure 6

Correlation plots of the predicted antioxidant activities obtained by OSWLS-SVM versus the actual antioxidant activities in 12 famous green teas: (a) DPPH scavenging activity estimated by MIR model; (b) ABTS radical scavenging activity estimated by the NIR model; (c) DPPH scavenging activity estimated by the MIR model; (d) ABTS radical scavenging activity estimated by NIR model; (e) DPPH scavenging activity estimated by the spectroscopic data fusion model; (f) ABTS radical scavenging activity estimated by the spectroscopic data fusion model.

(a)

(b)

(c)

(d)

(e)

(f)