I’ve spent much of my time at the Denver meeting talking to vendors in the exposition.  There were some very good pieces of equipment at the show. One company had a GC the size of a sub sandwhich.  Pretty cool. It’s for on-site work and actually comes in Army green and camo. I wish I could remember the name.

The Agilent ICP/MS is truly amazing.  Sub part per trillion capability.  The system uses something called the “helium collision mode” to exclude polyatomic cations from the mass analyzer.  You know those pesky argon chloride cations from sample plasma, right?  The argon polyatomic cations can mimic heavier elements by virtue of their combined atomic mass.  The instrument has an octapole chamber with helium in it that serves to impede the larger polyatomic cations. Clever monkeys.