Research Article
Rapid Quality Identification of Decoction Pieces of Crude and Processed Corydalis Rhizoma by Near-Infrared Spectroscopy Coupled with Chemometrics
Table 4
Results with berberine of NIR spectra pretreatment methods.
| Pretreatment | R2 | RMSEC (%) | RMSEP (%) |
| MSC + spectrum + NS | 0.9523 | 1.1030 | 1.2841 | MSC + 1stD + NS | 0.9484 | 1.3150 | 1.6901 | MSC + 2stD + NS | 0.9994 | 0.0676 | 0.0764 | MSC + spectrum + S-G | 0.9507 | 1.0147 | 1.6187 | MSC + 1stD + S-G | 0.9499 | 1.3148 | 1.6515 | MSC + 2stD + S-G | 0.9430 | 1.3158 | 1.6913 | MSC + 1stD + ND | 0.8841 | 2.0221 | 2.1980 | MSC + 2stD + ND | 0.9644 | 1.0125 | 1.0160 | SNV + spectrum + NS | 0.9516 | 1.2450 | 1.4714 | SNV + +1stD + NS | 0.9463 | 1.3153 | 1.7031 | SNV + 2stD + NS | 0.9812 | 0.9651 | 0.0970 | SNV + spectrum + S-G | 0.9498 | 1.4081 | 1.7017 | SNV + 1stD + S-G | 0.9494 | 1.3481 | 1.6107 | SNV + 2stD + S-G | 0.9422 | 1.2857 | 1.6006 | SNV + 1stD + ND | 0.8840 | 2.0221 | 2.1970 | SNV + 2stD + ND | 0.9609 | 1.0131 | 1.0167 |
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