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

Table 5

Method accuracy of determination of MA and MDMA in the blood sample.

Sample	Standard spiked (µg/L)	Initial sample concentration (µg/L)	Spiked sample concentration (µg/L)	Calculated concentration (µg/L)	Average recovery (%, n = 6)
MA
Sample 1	10	10	24.8	8.53	85.3
Sample 2	100	100	102.6	93.8	93.8
Sample 3	300	32.7	314.6	281.9	94.0
MDMA
Sample 1	10	8.7	17	8.6	86.9
Sample 2	100	46	137.3	91.3	91.3
Sample 3	300	68.4	354.9	286.5	95.5