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.

Article of the Year Award: Outstanding research contributions of 2020, as selected by our Chief Editors. Read the winning articles.