The Determination of Traces of Polyacrylamides in Water

Abstract

This article discusses two methods for the determination of polyacrylamides in potable water: the distillation‐nesslerization method; and, the turbidimetric method. Both methods are presented in terms of apparatus, reagents, preparation of standard curve, procedure, and results.

Influence of solution pH on stability of aluminum oxide suspension in presence of polyacrylic acid

“…The suspension was shaken at 25 • C for 24 h. Then the sediment was centrifuged and 5 cm 3 of clear solution were taken up each time for further analysis. The amount of adsorbed polyelectrolyte was determined from the difference in polymer concentration from the reaction of polyacrylic acid with hyamine proposed by Crummett and Hummel (1963). Opacity after the addition of hyamine to the PAA solutions was measured nephelometrically.…”

Surface Chemical Studies on the Competitive Adsorption of Poly(acrylic acid) and Poly(vinyl alcohol) onto Alumina

“…Subsequently, the suspension was centrifuged at 5000 rpm using a Remi centrifuge for 30 min and filtered through a Whatman 42 filter paper. The clear supernatant solution was analyzed for the residual PVA concentration as per the procedure followed by Zwick (24), whereas PAA was analyzed using Hyamine, adopting the method of Crummet and Hummel (25).…”

Surface chemical studies on the competitive adsorption of poly(ethylene glycol) and ammonium poly(methacrylate) onto alumina

“…An aliquot (4 ml) of the sample was taken in a test tube and 4 ml of the assay solution was added and stirred vigorously using a Remi vortex mixer and the absorbance of the white turbid solution was measured using a Shimadzu UV-260 UV-visible spectrophotometer at a wavelength maximum of 420 nm. To analyze APMA solution, a slightly modified procedure from the method given by Crummet and Hummel [32] was followed. One milliliter of the sample was taken in a test tube and mixed with 1 ml of 3% sodium citrate solution and 8 ml of deionized double-distilled water.…”