Research Article
Rapid and Nondestructive Detection of Proline in Serum Using Near-Infrared Spectroscopy and Partial Least Squares
Table 2
Comparison results of preprocessing methods.
| | Rc | Rp | SEC | SEP | Offset | RPD | RMSEC | RMSEP |
| Raw spectrum | 0.40 | 0.27 | 0.00007 | 0.00011 | −0.0459 | 14.39 | 0.00173 | 0.00183 | 1D + SG | 0.51 | 0.64 | 0.00009 | 0.00013 | 0.0210 | 14.34 | 0.00162 | 0.00139 | 1D + NO | 0.74 | 0.74 | 0.00015 | 0.00013 | −0.0209 | 14.51 | 0.00126 | 0.00124 | 2D + SG | 0.57 | 0.71 | 0.00011 | 0.00011 | 0.0227 | 14.34 | 0.00155 | 0.00130 | 2D + NO | 0.74 | 0.77 | 0.00013 | 0.00018 | −0.0013 | 14.49 | 0.00126 | 0.00125 |
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Note: SEC, calibration set standard error; SEP, prediction set standard error; RPD, relative percentage difference.
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