Determination of Cationic, Nonionic and Anionic Polyelectrolytes

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  • カチオン・ノニオンおよびアニオン性高分子凝集剤の定量法

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Quantitative analytical method is developed to detect the dialkylaminoethylacrylate or polyacrylamide existing in water at low concentration. Photoelectric measurement is utilized to determine the turbidity with co-existence of inorganic salts ; sodium chloride, sodium sulfate and sodium chlorate.<BR>The calibration curves are formed of linear over the concentration range from 0 to 50 mg El-1 with cation dialkylaminoethylacrylate, from 0 to 20 mg El-1 with cationic polyacrylamide (mannich), from 0 to 10 mg El-1 with nonionic polyacrylamide, from 0 to 20 mg El-1 and from 0 to 30 mg El-1 with polyacrylamide of 20 mole % and 30 mole % anionic concentration. The detection limits are 1.2, 2.0, 0.02, 0.85 and 2.0mg El-1 respectively. It has been found that the mechanism of this analytical method for anionic polyelectrolyte is clearly explained with Schulze-Hardy's low and its mechanism is different from that of cationic polyelectrolyte.

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