MSCHemist wrote:
Sadly I ended up having to replace the calibration valve after all. 2 weeks later it starting plugging up during tunes and I tried again using some methylene chloride then methanol and baking it at 68 deg C. It then began flooding the mass spec with insane amounts of PFTBA during the tune.
That little capilary tube in there is supposed to be pretty breakable. Pity that bit is not a user replaceable part vs the whole valve assembly.