Hydrophilic interaction liquid chromatography-tandem mass spectrometry (HILIC-MS/MS) determination of cocaine and its metabolites benzoylecgonine, ecgonine methyl ester, and cocaethylene in hair samples

1. Quintela, O.
2. Lendoiro, E.
3. Cruz, A.
4. De Castro, A.
5. Quevedo, A.
6. Jurado, C.
7. López-Rivadulla, M.