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Updated: Aug 25, 2026

Synthesis and Exfoliation of Discotic Zirconium Phosphates to Obtain Colloidal Liquid Crystals
Published on: May 25, 2016
Colloidal titration of aqueous zirconium solutions with poly(vinyl sulfate) by potentiometric endpoint detection
Osamu Sakurada1, Yasutake Kato, Noriyoshi Kito
1Department of Materials Science and Technology, Faculty of Engineering, Gifu University, Gifu 501-1193, Japan. sakurada@apchem.gifu-u.ac.jp
Abstract:
Zirconium oxy-salts were hydrolyzed to form positively charged polymer or cluster species in acidic solutions. The zirconium hydrolyzed polymer was found to react with a negatively charged polyelectrolyte, such as poly(vinyl sulfate), and to form a stoichiometric polyion complex. Thus, colloidal titration with poly(vinyl sulfate) was applied to measure the zirconium concentration in an acidic solution by using a Toluidine Blue selective plasticized poly(vinyl chloride) membrane electrode as a potentiometric end-point detecting device. The determination could be performed with 1% of the relative standard deviation. The colloidal titration stoichiometry at pH < or = 2 was one mol of zirconium per equivalent mol of poly(vinyl sulfate).
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