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Journal of Analytical Science and Technology
Fig. 6 | Journal of Analytical Science and Technology

Fig. 6

From: Simultaneous determination of ethyl glucuronide, cocaine, cocaethylene, and benzoylecgonine in hair by using LC–MS/MS

Fig. 6Fig. 6

LC–MS/MS chromatograms of (a) blank hair sample with IS, (b) low QC hair sample containing 20 pg/mg for EtG, 5 pg/mg for COC, 25 pg/mg for CE, and 2.5 pg/mg for BZE, respectively, (c) positive hair sample for all compounds (forensic sample-1), and (d) EtG-positive sample (forensic sample-2). Positive ionization mode was performed for COC and its metabolites, whereas EtG was operated in negative ionization mode

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