Table 3.

(%) Recovery (Mean ± SD) of analytes and IS (n = 5)

Concentration (ng/mL)		Recovery (%)
		Analyte	IS
Plasma
Nicotine
LQC	9	95.05 ± 4.37	98.20 ± 1.86
MQC	75	103.10 ± 2.69	100.10 ± 2.36
HQC	150	95.00 ± 8.69	100.53 ± 1.30
Cotinine
LQC	9	89.22 ± 4.52	98.20 ± 1.86
MQC	225	103.42 ± 4.13	100.10 ± 2.36
HQC	450	93.43 ± 2.49	100.53 ± 1.30
Brain
Nicotine
LQC	9	101.58 ± 1.00	95.79 ± 2.42
MQC	40	94.96 ± 3.51	95.14 ± 1.03
HQC	80	107.57 ± 6.46	95.57 ± 1.73
Cotinine
LQC	9	99.01 ± 5.34	95.79 ± 2.42
MQC	40	90.37 ± 3.15	95.14 ± 1.03
HQC	80	105.60 ± 3.71	95.57 ± 1.73