TY - CPAPER TI - Two step pre-concentration at fully microscale column switching capillary liquid chromatography-mass spectrometry allowing versatile and sensitive analysis of sulfonamides in aqueous environmental samples PY - 2013 AU - Carvalho, Lucas AU - Lima, Adriel AU - Padovan, Rodrigo Nogueira AU - Lanças, Fernando Mauro AU - Santos Neto, Alvaro Jose dos T2 - International Symposium on High Performance Liquid Phase Separations and Related Techniques - HPLC J2 - Book of abstracts PP - Amsterdam PB - HPLC ER -