Table 3.
Selected effective variables by competitive adaptive reweighted sampling (CARS) for visible spectra, short-wave near infrared spectra (SNIR), and long-wave near infrared spectra (LNIR) for the quantification of notoginseng powder (NP) adulterated by Sophora flavescens powder (SFP), corn flour (CF) and the mixture of two adulterants, respectively.
| Adulterant | Spectral Range | Selected Effective Variables (nm) |
|---|---|---|
| SFP | Visible | 406, 408, 431, 439, 475, 476, 537, 697 |
| SNIR | 755, 926, 1016 | |
| LNIR | 937, 984, 1508, 1951, 2003, 2407 | |
| CF | Visible | 506, 508, 509, 511, 541, 578, 579, 621, 629, 634, 699 |
| SNIR | 700, 750, 865, 980, 992, 1040 | |
| LNIR | 1580, 1886, 1945, 2311 | |
| SFP&CF | Visible | 361, 393, 699, 700 |
| SNIR | 737, 745, 858, 941 | |
| LNIR | 944, 1004, 1018, 1606, 1912, 2048, 2496, 2502 |