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Table 2 Analysis results of ET and TC in the validation set using multivariate calibration methods (PLS, PCR, and ILS)

From: Design, optimization, and validation of chemometrics-assisted spectrophotometric methods for simultaneous determination of etodolac and thiocolchicoside in pharmaceuticals

Sample no. Added concentration (μg/mL) Found concentration (μg/mL)
PLS PCR ILS
ET TC ET TC ET TC ET TC
1 45 1.0 47.07 1.03 47.15 0.98 47.67 0.98
2 60 2.5 59.05 2.63 58.95 2.52 58.37 2.47
3 30 2.5 30.85 2.46 31.39 2.47 30.53 2.44
4 75 5.0 75.88 5.15 75.72 4.98 77.98 5.15
5 15 5.0 15.49 5.10 14.85 4.97 15.28 5.15
6 60 7.5 61.25 7.52 59.80 7.85 60.83 7.87
7 30 7.5 31.46 8.00 30.55 7.77 31.54 7.66
8 45 10.0 44.81 9.80 44.22 9.97 46.98 9.67