The mass spec will run you $4000 to $10k, and require repair and parts; the vacuum pump will probably need to be cleaned and refurbished. The electron multiplier is probably in need of replacement. Filaments, the proper columns (low-bleed mass spec columns), etc. You can get stuff used; I buy all kinds of used columns on the cheap; most work just fine. So, add another $2000 to $4000 to get it up and running. Don't expect one in that price range to work on anything newer than W2000. Double it if you want it to work on XP or newer.
What mass spec offers over the detectors found in the GC is the mass of the ions that are produced in the MSD. Then there's interpretations- yes, search the libraries, but interpretation of those mass fragments to determine the parent compound is like guessing who made a watch by weighing the smashed parts.
The mass spec is a poor instrument for a hobbyist. The only thing that works worse than a mass spec used full time is a mass spec used part time. They're fussy, expensive, and absolutely invaluable in providing that fragment mass and column elution time.
On Mon, Sep 29, 2014 at 3:19 AM, Michele Stefanoli <michelestefanoli@gmail.com> wrote:
A last thing, sorry. So an old 50'60' gc doesn' imply expensive managment and parts are available at reasonable prices? A mass spectrometer is strongly recommended to analyze more analytes?
Thanks
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