Ethanethiol in Propane

[jhobbs]

Hi, I was wondering if anyone had ever successfully separated ethanethiol(the added foul smelling chemical for safety) from propane. I am able to separate propane from its components: methane, ethane, buatane, isobutane. Also I am directely injecting gas into the GC if you didn't figure. But I have no luck in seeing ethanethiol by itself. I am using a Restex RX1 column using a cryovalue. I start at -60C for 5 minutes and ramp to 100C at 8C/min.
Any help would be appreciated.
thanks
JEH

[chromatographer1]

Do you have an idea of the concentration of ethanethiol in the propane?

[jhobbs]

I haven't the slightest idea how much ethanethiol. That would be interesting to know how much EtSH is put into propane. I have a standard of ethanethiol that I haven't run yet because I want to wait till most everyone is out of the building. From the sounds of it though it takes very little to make a huge smell. I would think that MS would detect trace amounts though.