Journal of Sensors / 2020 / Article / Tab 3

Research Article

Application of a Spectroscopic Analysis-Based Portable Sensor for Phosphate Quantitation in Hydroponic Solutions

Table 3

Performances of multiple regression models used for predicting phosphate ion concentration.

Regression modelPreprocessingRMSECRegression modelPreprocessingRMSEC
RMSEPRMSEP

PLSRNo (raw data)18.200.88PCRNo (raw data)17.100.90
20.200.8721.100.84
Smoothing14.890.92Smoothing17.100.88
18.000.8820.200.86
Smoothing + SNV18.300.88Smoothing + SNV23.600.81
26.900.7528.600.71
Smoothing + MSC27.100.74Smoothing + MSC27.300.75
30.100.7029.500.72
1st derivative18.500.881st derivative18.600.89
22.500.8323.500.84

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