Why do we get strong negative peaks in UPLC-fluorescence detector?

we use ACQUITY UPLC system with an ACQUITY UPLC fluorescence(FR) detector (Waters, Milford, MA, USA) for the separation of 2-AB labeled glycans. the column is ACQUITY UPLC BEH SEC 1.7 um (Journal...

06 May 2016 3,798 8 View