I have added a couple of tags. Please let us know the instrumentation you are using? Headspace etc?
I have a GC/HS :Agilent 7890A / 7697A. split/splitless & VI inlets with FID
For Ethanol I would suggest that you use a CP-Wax 52CB Part CP7668i.
Use it with your Headspace.
Try to add water to your powder and measure it with your Headspace at around 90°.