guanadine - 2-2-2015 at 10:44
i used to post here a long time ago. i forgot the userid.
I am looking for a way to measure crystal growth via electrical conductivity. lets say i have a 1cc sample of xyz chemical which cools down from T
temperature down to U temperature. I want to measure how fast it is crystallizing per unit time. Is there an mixture of ionic solids nonpolar liuids
or metals that could be read via ohmmeter or op amp?
EDIT(woelen) : Changed subject title for clarity reasons
[Edited on 2-2-15 by woelen]
Metacelsus - 2-2-2015 at 12:28
Instead of measuring conductivity, can you measure the volume change? I think that it would give a better indication of crystal formation.
guanadine - 2-2-2015 at 12:54
No because we are working with small samples <1cc.
Zombie - 2-2-2015 at 13:21
You would have to specify a compound, and know it's electrical conductivity (if any). even then you would need sophisticated equipment to measure it
that would be capable of disregarding the sample container.
Volumetric displacement would seem to be the logical approach no matter what the sample size.
Perhaps something can be gleaned from the specific gravity of the solvent. That would at least give a percentage comparative.
guanadine - 2-2-2015 at 14:02
sample sizes are too small maybe measuring dielectric constant would be easier
Zombie - 2-2-2015 at 14:50
If you have the equipment then frequency measurements would be the way to go.
It would be far more precise than resistance.
guanadine - 2-2-2015 at 20:32
I was considering melting a small sample of a salt inside a pyrex tube and recording the conductivity via electrodes. i thought about ultrasound.
Zombie - 3-2-2015 at 18:01
Well, There are several methods that can be employed.
Digital time lapse photography,
Ultra sound imaging
Magnetic resonance Imaging
Electron density measurement
Sample rate frequency measurements
While I am not proficient in all these technologies, I can only speculate as to their usefulness in your application, and in turn... the depth of your
wallet.
Pretty cool topic tho. It could get pretty intense.