Determining the percent solids in either a water based or organic solvent based material is a basic procedure used to make calculations for reactions, and in some cases, just curiosity. But, in the world of chemistry, it is a fundamental process. Although I used Elmer's glue as an example, all solutions and emulsions with solid constituents are applicable. The video is really self explanatory but here is the breakdown of the method:
- Weigh the aluminum cup. Label this A
- Without taring, add the wet sample. Label this B
- Let the sample evaporate or warm slowly to drive off the water or solvent. Label this C
- Weigh the now dry sample and the cup.
C - A
B - A
Do the subtraction and divide the result and multiply by 100. You now have the amount of solid chemical in the cup in percent. Enjoy!