For those of you running Thermo's Trace GC Ultra for d13C of lipids, I'm
curious as to what kind of reproducibility folks are getting with
respect to their d13C values of their standards. I've spent the week
injecting Thermo's isooctane test mixture under different split ratios
and injector temperatures, and the best I can do is 0.10 permil. Any
comments would be appreciated.