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

Table 1

Concentrations of Ca, Th, and Te in CHMs samples.

CHMs	Sample groups	Added concentration (μgg^−1)
		Ca	Th	Te
Radix Angelicae Dahuricae	R1	40.00	0.00	0.00
	R2	32.00	8.00	0.00
	R3	24.00	12.00	4.00
	R4	16.00	16.00	8.00
	R5	8.00	20.00	12.00
	R6	0.00	24.00	16.00
	R7	8.00	12.00	20.00
Liquorices	L1	40.00	0.00	0.00
	L2	32.00	8.00	0.00
	L3	24.00	12.00	4.00
	L4	16.00	16.00	8.00
	L5	8.00	20.00	12.00
	L6	0.00	24.00	16.00
	L7	8.00	12.00	20.00