A Validated Method for the Simultaneous Determination of Methamphetamine and 3,4-Methylenedioxy-N-methamphetamine in Blood-Based Liquid Chromatography-Tandem Mass Spectrometry

Table 3

The linearity for determination of MA and MDMA in the blood sample.

Time	Concentration range (µg/L)	Areasd/areaisd = slope(sd)/(isd) + intercept		Correlation coefficient (R^2)
		Slope	Intercept
MA
Day 1	1–5000	0. 5458	0.6567	0.998
Day 2	1–5000	0.5533	0.5018	0.999
Day 3	1–5000	0.5529	0.7721	0.999
MDMA
Day 1	0.5–500	0.2984	0.0563	0.999
Day 2	0.5–500	0.3062	0.0352	0.999
Day 3	0.5–500	0.3046	0.0256	0.999