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Fig. 2 | Journal of Analytical Science and Technology

Fig. 2

From: Rapid and simple LC–MS/MS determination of urinary ethyl glucuronide, naltrexone, 6β-naltrexol, chlordiazepoxide, and norchlordiazepoxide for monitoring alcohol abuse

Fig. 2

Chromatograms of EtG for four types of columns: a Zorbax SB-C18 (2.1 × 75 mm, 3.5 μm), b Scherzo SM-C18 (2.0 × 100 mm, 3 µm), c Thermo Hypersil Gold (2.1 × 150 mm, 5.0 μm), and d Waters Xselect HSS T3 (2.1 × 150 mm, 2.5 μm). The columns were tested in isocratic mode (water containing 0.05% formic acid: methanol = 70:30) at flow rate of 0.2 mL/min

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