Optimization and validation of simultaneous analyses of ecgonine, cocaine, and seven metabolites in human urine by gas chromatography-mass spectrometry using a one-step solid-phase extraction

2018 ◽  
Vol 11 (2) ◽  
pp. 361-373 ◽  
Author(s):  
Nicolás Fernández ◽  
Laura Marina Cabanillas ◽  
Nancy Mónica Olivera ◽  
Patricia Noemí Quiroga
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