Combining Orbitrap-HRMS acquisition modes and direct injection by a guard column for targeted analysis of underivatized amino acids in urine

Microchemical Journal, Vol. 196, 2024

1. Fernández-del-Campo-García, M.T.
2. Casas-Ferreira, A.M.
3. Rodríguez-Gonzalo, E.
4. Pérez Pavón, J.L.