Salt-induced ionic liquid-based microextraction using a low cytotoxic guanidinium ionic liquid and liquid chromatography with fluorescence detection to determine monohydroxylated polycyclic aromatic hydrocarbons in urine

1. Pacheco-Fernández, I.
2. Pino, V.
3. Lorenzo-Morales, J.
4. Ayala, J.H.
5. Afonso, A.M.