Research Article
Preconcentration and Determination of Psychotropic Drugs in Urine Samples by Ion Mobility Spectrometry with Electrospray Ionization Coupling On-Line Single-Drop Liquid-Liquid-Liquid Microextraction
Figure 4
SDLLLME-IMS spectra obtained for extraction of ketamine (a) and pethidine (b) in urine at 0 μg·L−1 (blank), 1 μg·L−1, and 100 μg·L−1.
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| (b) |