Rapid Detection of Pesticide Residues in Chinese Herbal Medicines by Fourier Transform Infrared Spectroscopy Coupled with Partial Least Squares Regression

Table 4

The results obtained for validation assays of accuracy and precision in CHMs samples.

Methods	CHMs	Pesticides	Intraday				Interday
			Accuracy		Precision		Accuracy		Precision
			RMSEC	RMSEP	RSDC%	RSDP%	RMSEC	RMSEP	RSDC%	RSDP%
NIR-PLSR	Radix Angelicae Dahuricae	Ca	0.48	0.59	2.09	2.55	1.12	1.54	4.66	7.30
		Th	0.47	0.79	2.83	4.69	0.76	1.14	4.49	6.74
		Te	0.33	0.43	3.18	3.94	0.47	0.67	4.30	6.37
MIR-PLSR		Ca	0.08	0.11	0.36	0.42	0.48	0.57	2.26	2.41
		Th	0.10	0.39	0.61	1.06	0.33	0.53	1.92	3.09
		Te	0.05	0.08	0.43	0.77	0.50	0.69	4.71	6.80
NIR-PLSR	Liquorices	Ca	0.45	1.01	1.90	5.00	1.50	1.96	6.40	9.20
		Th	0.36	0.85	2.30	4.20	0.86	1.24	5.30	7.00
		Te	0.26	0.55	2.60	4.60	0.67	0.85	6.40	6.60
MIR-PLSR		Ca	0.067	0.14	0.30	0.60	0.38	0.46	1.60	1.80
		Th	0.042	0.34	0.20	0.80	0.34	0.43	1.90	2.80
		Te	0.038	0.082	0.30	0.80	0.22	0.31	1.90	3.30