by
AICMM » Tue Oct 14, 2014 1:48 pm
osp001,
ECD is very sensitive when the tracer is right. SF6 is one example, can easily go to ppt levels. There are also some perfluoroalkanes that might work. Two other things to consider: 1) is the sample getting collected and coming back to the lab? 2) What is the balance gas and can you easily separate the balance from the tracer?
#1 because complexity is an issue. In order to run MS you need lots of supporting hardware. #2 because you may need to separate tracer from the balance gas. Using SF6 and ECD as an example, O2 will also respond on ECD so you need to separate the O2 from the sample in order to use an ECD.
I can discuss further if you desire.
Best regards,
AICMM