João A. Queiroz

The role of alternative specimens in toxicological analysis.

E. Gallardo, J. Queiroz, Eugenia Gallardo, 2008, Biomedical chromatography : BMC.

Current technologies and considerations for drug bioanalysis in oral fluid.

M. Barroso, Eugenia Gallardo, João A. Queiroz, 2009, Bioanalysis.

LC-MS: a powerful tool in workplace drug testing.

E. Gallardo, J. Queiroz, M. Barroso, 2009, Drug testing and analysis.

Mixed-mode solid-phase extraction for sample cleanup in hair analysis for methadone and its main metabolite.

M. López-Rivadulla, M. Barroso, D. N. Vieira, 2010, Biomedical chromatography : BMC.

Simultaneous quantitation of morphine, 6-acetylmorphine, codeine, 6-acetylcodeine and tramadol in hair using mixed-mode solid-phase extraction and gas chromatography–mass spectrometry

J. Queiroz, M. López-Rivadulla, M. Barroso, 2010, Analytical and bioanalytical chemistry.

Development and validation of an analytical method for the simultaneous determination of cocaine and its main metabolite, benzoylecgonine, in human hair by gas chromatography/mass spectrometry.

J. Queiroz, M. López-Rivadulla, M. Barroso, 2008, Rapid communications in mass spectrometry : RCM.