Journal of Analytical Methods in Chemistry / 2013 / Article / Fig 1

Research Article

Determination of Morphine and Codeine in Human Urine by Gas Chromatography-Mass Spectrometry

Figure 1

Mass spectra of morphine (a) and codeine (b) in SIM mode with EI (+) source.
151934.fig.001a
(a)
151934.fig.001b
(b)

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