Can nitrogen digestion determine the concentration of polyacrylamide-type polymers?

Conclusions The nitrogen digestion method is an effective way for determining the concentration of polyacrylamide-type polymers, including partially hydrolyzed polyacrylamide, sulfonated polyacrylamides, and cationic polyacrylamides.

How to determine acrylamide based polymer concentration?

Many methods have been reported on the determination of acrylamide-based polymer concentrations [ ], including nitrogen-measurement method, nitrgon-bromination method, turbidimetry method, gel permeation chromatography method, viscosity measurement,

Is cationic polyacrylamide a good field test?

Positive interferences of up to 10% were observed for cationic and nonionic polyacrylamides in synthetic sea- water, while anionic polyacrylamide showed positive interferences of up to 25%. This method has some utility as a field test method, but its sensitivity to salts common in brine greatly limits its use.

Can a refractometer measure cationic polyacrylamide concentration?

The method requires that polymer concentration is pro- portional to the RI of the solution. Lindstrrm and SSre- mark used a Knauer refractometer thermostatted to + 0.005, and claimed an accuracy of + 1 mg/l. They were able to measure cationic polyacrylamide concen- trations as low as 20 mg/l.

How to determine the degree of hydrolysis in polyacrylamide?

The determination of the degree of hydrolysis in poly (acrylamides): simple methods using C 13 N.M.R., and elementary analysis Polyacrylamide are used extensively in enhanced oil recovery, drilling fluids, and in gels for profile control. This review enables drilling engineers…

What is polyacrylamide used for?

Polyacrylamide are used extensively in enhanced oil recovery, drilling fluids, and in gels for profile control. This review enables drilling engineers or reservoir engineers to choose the most appropriate analytical method for measuring polyacrylamide concentration for their particular project.