“…The literature reports several techniques for quantifying and characterizing polyacrylamide in solution; among these are the total organic carbon method,10,11 titration complexation,12,13 fluorescence spectrometry,14,15 hydrolysis of amide groups with the detection of ammonia,16,17 colloidal titration,18,19 turbidimetry;20,21 viscometric method,22,23 polarography,24,25 the method of flocculation in alkaline solution,26 radioactive labeling,27,28 size exclusion chromatography,29 and light scattering 30. However, only some of these methods are suitable for determining the critical overlap concentration ( C* ).…”