Getting Into Hot Water:
Surely microwaves cause oscillations of water molecules; which generate friction; which heats the surrounding parent material. 
That's roughly what happens in a microwave oven. Mind you: they are benchtop units. 
Us lads at the large end of the business have always used drying ovens. They work. 
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Moisture Analysis Of Small Samples
NIR Near infrared is used for non distructive measurement of powders with excellent results. Several companies manufacture this type of equipment. Perhaps you should contact Moisttech at their web sit Moisttech.com for more detail iformation ■
Maybe Not
We've tried the oven approach at various temperatures from 60 to 105°C and have found that more than water is driven off. There are many chemicals that have high VOCs as indicated by the strong odors in the air when drying. We are having trouble accepting the values with this process.
Some microwave analyzers claim that the test is performed in less than a second and that there is negligible rise in temperature. We would discard that sample post testing. I now qualify the initial request for opinions for the quality of non-destructive in regards to not driving off more than water.
Kaos1
Originally Posted by louispanjang
That's roughly what happens in a microwave oven. Mind you: they are benchtop units. Us lads at the large end of the business have always used drying ovens. They work.
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Moisture Analysis
Greetings,
I am looking for a moisture analyzer that meets the following criteria:
Benchtop model
1-10 gram sample size
Non-destructive, does not heat the sample above room temperature
Fast
Accurate
Can handle blends (up to 60 chemicals) of salts, sugars, amino acids, vitamins...
Is microwave technology the direction to go?
Regards,
Kaos1 ■