The insoluble content of polyacrylamide (PAM) in water can be determined by the following methods:
Take a certain amount of PAM sample, add a certain amount of water, stir evenly, and place it at room temperature for a period of time.
Filter the sample, filter out insoluble substances with filter paper or glass fiber filter membrane, and collect the filtrate.
The filtrate was placed on a Hot Plate and allowed to evaporate to constant mass to obtain the residue mass.
Calculate the insoluble content, the formula is as follows:
Insoluble matter content (%) = residue mass/sample mass × 100%
NBCHAO reminds you: Pay attention to the water content of the sample when measuring, and use a filter paper or membrane that is fine enough to avoid inaccuracy due to the large pore size of the filter paper.
