Determination of polyacrylamides by maximum suppression

Abstract

. Can. J. Chem. 65, 557 (1987). The use of polarographic maximum suppression methods for determining polyacrylamides and polyacrylic acid-based polymers was investigated. Using the oxygen, co2+, and H~~+ maxima these polymers were determined at the low ppm level. The effectiveness of polymers as maximum suppressors was dependent on the charge of the polymer and that of the electrode at the potential at which the polarographic wave occurred. The maximum suppression of various binary mixtures of polyacrylamides indicated that in some mixtures suppression was additive while in other mixtures, particularly those containing both anionic and cationic polymers, the suppression was greatly reduced. Aqueous extracts of chosen coals contained various interfering substances which could be removed most efficiently using Sephadex G-75, although this resin was only compatible with anionic and neutral polymers. BYRON R. WENTZELL, TRUIS SMITH-PALMER et JOHN C. DONINI. Can. J. Chem. 65,557 (1987). On a CtudiC la possibilitt d'utiliser les mCthodes de suppression polarographiques maximales pour dCterminer les polyacrylamides ainsi que les polymkres dCrivCs de l'acide polyacrylique. En utilisant les maxima de l'oxygkne, du co2+ et du Hg2+, on a dCtermint ces polymkres 2 des niveaux de ppm. L'efficacitC des polyrnkres comme suppresseurs maximaux dCpend de la charge du polymkre ainsi que de celle de 1'Clectrode au potentiel de laquelle la vague polarographique se produit. La suppression maximale de divers mtlanges binaires de polyacrylamides indique que, dans quelques mClanges, la suppression est additive; toutefois, dans d'autres mClanges et particulikrement dans ceux contenant h la fois des polymeres anioniques et des polymbres cationiques, la suppression est fortement rkduite. Les extraits aqueux de charbons choisis contiennent diverses substances qui internrent et qui peuvent &tre CliminCes efficacement en utilisant du Sephadex G-75; toutefois, cette k i n e n'est compatible qu'avec les polymkres anioniques ou neutres.[Traduit par la revue]

Determination of the charge density of acrylamide/acrylate copolymers by tensammetry

“…However, most interferences, including humic acid, can be removed by the various chromatographic processes we developed for cleaning up pam solutions prior to determining concentrations. The procedures are fairly quick and typical interferences and appropriate removal procedures have been described in detail in previous papers (4,5).…”

A tensammetric study of polyacrylamides, including their determination

“…The polyacrylamides (1), polyalkylamine (lo), and thickener feed were provided by the Coal Research Lab, Energy, Mines and Resources, Edmonton. Coal washings were prepared from four different raw coal samples as described previously (1).…”

“…We recently reported the determination of several polyacrylarnide-based polymers by polarographic maximum suppression in mercury (11) solutions (1). The main disadvantage of this method is that it is non-specific; it cannot be used to analyse one pam in the presence of other pams, or in the presence of other types of surfactant.…”

Determination of the critical concentration of partially hydrolyzed polyacrylamide by potentiometry in an acidic medium

“…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* ).…”