Organochlorine pesticides (OCPs) need to be controlled down to extremely low levels in water. From the Water Framework Directive (WFD), the aim is to have limits of detection for certain OCPs at 10 fg/1 for surface and coastal water.
In recent work on the 7200 Q-TOF, low limits for OCPs can be achieved using Negative Chemical Ionisation (NCI) with accurate mass. It was further thought that sensitivity could be enhanced by switching reagent gas from methane to ammonia as this can provide less fragmentation.
|Application Note Downloads|
Initial GC/Q-TOF Work for Trace Analysis of Organochlorine Pesticides using NCI