Identification of tyrosine and nitrotyrosine with a mixed-mode solid-phase extraction cleanup followed by liquid chromatography–electrospray time-of-flight mass spectrometry in plants

1. Chaki, M.
2. Sánchez-Calvo, B.
3. Carreras, A.
4. Valderrama, R.
5. Begara-Morales, J.C.
6. Corpas, F.J.
7. Barroso, J.B.