For a GC-MS in CI mode: if the instrument will be idle for a few days or even a week, is it recommended that the ionization gas (methane in this case) be turned off, or is it better to leave it on?
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For a GC-MS in CI mode: if the instrument will be idle for a few days or even a week, is it recommended that the ionization gas (methane in this case) be turned off, or is it better to leave it on?