Solid-phase microextraction coupled with high performance liquid chromatography using on-line diode-array and electrochemical detection for the determination of fenitrothion and its main metabolites in environmental water samples

1. Sánchez-Ortega, A.
2. Sampedro, M.C.
3. Unceta, N.
4. Goicolea, M.A.
5. Barrio, R.J.