Dual Concentrator P&T GC-MS
Posted: Fri May 13, 2011 11:14 am
Has anyone had experience with a dual P&T system?
I am looking into having one autosampler in soil mode, alternately purging from the sutosampler into two concentrators, which will desorb into one GCMS.
There is a product called a PT2 valve that splits the gas flow from the autosampler (Varian Archon) to the two traps, but I'm not sure where to get one. I presume that it also has the electronics to trigger the autosampler to start readying the next vial to purge as soon as either of the concentrators is at standby.
I'm also not sure about how to connect two transfer lines to one volatiles interface. I guess a simple Y-valve would suffice. The sample flow would be diluted by the carrier gas from the scond line, but we could reduce the split flow to compensate.
cheers
I am looking into having one autosampler in soil mode, alternately purging from the sutosampler into two concentrators, which will desorb into one GCMS.
There is a product called a PT2 valve that splits the gas flow from the autosampler (Varian Archon) to the two traps, but I'm not sure where to get one. I presume that it also has the electronics to trigger the autosampler to start readying the next vial to purge as soon as either of the concentrators is at standby.
I'm also not sure about how to connect two transfer lines to one volatiles interface. I guess a simple Y-valve would suffice. The sample flow would be diluted by the carrier gas from the scond line, but we could reduce the split flow to compensate.
cheers