Table 2.

Calibration curve of RES after adding internal standard.

Samples	Typical equations	R2	Concentration range	LLOQ (n = 3)
Plasma	y = 0.9653x + 0.0365	0.9997	20–1000 ng/mL	0.97 ± 0.094
Heart	y = 0.6477x + 0.0456	0.9987	40–2000 ng/g	1.03 ± 0.096
Liver	y = 0.4626x + 0.0489	0.9992	40–2000 ng/g	1.12 ± 0.123
Spleen	y = 0.5825x + 0.0647	0.9993	40–2000 ng/g	1.07 ± 0.098
Lung	y = 0.6873x + 0.0349	0.9974	40–2000 ng/g	1.17 ± 0.116
Kidney	y = 0.6986x + 0.0764	0.9991	40–2000 ng/g	1.05 ± 0.127
Brain	y = 0.7357x + 0.0368	0.9994	40–2000 ng/g	1.18 ± 0.113