I just meant the small amount that would be carried along by the
already condensed vapors, for example if vacuum distilling amines..
But I don't use those thread fits at all when vacuum distilling.
(and I clean & dry the bulb of my (jointed) distilling thermometer, the inside of my still head, condenser, vacuum adaptor and receiving flask very thoroughly each time beforehand - maybe not really necessary, but it gives me the good feeling of having done
everything possible to achieve high purity!
)
indole_amine