Table 2.

Linearity, regression diagostics, LODs, and LLOQs

Compound	Linearity range (ng/ml)	Internal standard (ng/ml)	Slope	Intercept	r	LOD (ng/m l)	LLO Q (ng/m l)
Cocaine	3.0–300	Cocaine-D3 (30)	0.7279	0.0319	0.9973	0.9	3.0
EME	2.0–200	EME-D3 (20)	0.8994	0.0352	0.9984	0.6	2.0
BE	2.9–290	BE-D3 (29)	0.6905	0.0562	0.9969	0.9	2.9
ECG	1.9–190	ECG-D3 (19)	0.6526	0.0263	0.9965	0.6	1.9
Norcocaine	2.9–290	Coc-D3(30)	0.3274	0.0054	0.9974	0.3	2.9
NEME	1.9–190	Coc-D3(30)	0.0816	0.0044	0.9942	0.2	1.9
Cocaethylene	3.2–320	Cocaethylene-D3 (32)	0.8920	0.0178	0.9986	0.3	3.2
EEE	2.1–210	Coc-D3(30)	0.5001	0.0030	0.9972	0.2	2.1
Norcocaethyle ne	3.0–300	Coc-D3(30)	0.4590	0.0061	0.9974	0.3	3.0
NEEE	2.0–200	Coc-D3(30)	0.1131	0.0026	0.9966	0.2	2.0