solvent layer: 1
solid precipitate: no
I ran the solvent layer I got in my unknown in the GC and I had sharp peaks in the beginning but at about 4 min on the polar column, I got a broad peak that tailed off considerably.
question is, Is it water?
I'm not sure how water would look if you had it in your sample after placing it in the GC. (Peak can't be the unknown compound because it's not volatile, right?)
I don't know how to make sure that there is no water in solvent layer either. Couldn't there be one layer if you have a polar solvent + water?
I tried to put a drop of the solvent layer on drierite to see if it changed from blue to pink, but it did not.
Does this mean that there is no water? couldn't it mean that there is more organic solvent than water as well?
Second test I did for water was adding solvent layer to water and shaking. It was partially miscible but not completely. (polar solvent?)
Is there any sure method to determine if there is water in solvent layer or not?
Thanks Dr.Bob
7 answers
now I'm confused.
http://en.wikipedia.org/wiki/Desiccant#Drying_of_solvents
I have never used a drying agent in this particular lab before. I guess Drierite is a desiccant that we have available, and that I mentioned experimenting with above.
The problem I have is that I'm not believing what I'm seeing. It did not turn from blue to pink like it would if it had water and the solvent just evaporated quickly after touching the drierite.
BUT if there was water and there was just more organic solvent in the layer, wouldn't it do the same as the above described situation?
Thank you,
Dr.Bob
Utilizing the CaSO4 to dry the layer would not tell me if there was or was not water.
basically,
Is there any way to determine if there is water in solvent layer?