Application of continuous and selective water detector for quantitative measurements - Determination of the water content of anion-exchange resins

J. Kristóf, J. Inczédy

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5 Citations (Scopus)

Abstract

A standard method was developed for investigation of the adsorbed water in ionexchange resins. The previously-dried anion-exchange resins in Cl, SO4 and HSO4 form were investigated by simultaneous TG, DTG and DTA measurements (derivatograph), and the evolved gases were passed through the continuous and selective water detector system developed earlier. It was found that in the case of SO4 and HSO4-form resins two types of water binding (loosely and strongly-bound water) could be distinguished. The second step, the stronglybound water step, could not be observed in the DTG curves, because the release of the bound water and the decomposition of the fixed ionic group take place simultaneously. As the two types of water peaks strongly overlap, their quantitative evaluation was carried out by graphical analysis.

Original languageEnglish
Pages (from-to)51-59
Number of pages9
JournalJournal of Thermal Analysis
Volume19
Issue number1
DOIs
Publication statusPublished - Aug 1980

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Anion Exchange Resins
resins
Water content
moisture content
Ion exchange
Negative ions
Resins
anions
Detectors
Water
detectors
water
Differential thermal analysis
thermal analysis
Gases
Decomposition
decomposition
evaluation
curves

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Engineering(all)

Cite this

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N2 - A standard method was developed for investigation of the adsorbed water in ionexchange resins. The previously-dried anion-exchange resins in Cl, SO4 and HSO4 form were investigated by simultaneous TG, DTG and DTA measurements (derivatograph), and the evolved gases were passed through the continuous and selective water detector system developed earlier. It was found that in the case of SO4 and HSO4-form resins two types of water binding (loosely and strongly-bound water) could be distinguished. The second step, the stronglybound water step, could not be observed in the DTG curves, because the release of the bound water and the decomposition of the fixed ionic group take place simultaneously. As the two types of water peaks strongly overlap, their quantitative evaluation was carried out by graphical analysis.

AB - A standard method was developed for investigation of the adsorbed water in ionexchange resins. The previously-dried anion-exchange resins in Cl, SO4 and HSO4 form were investigated by simultaneous TG, DTG and DTA measurements (derivatograph), and the evolved gases were passed through the continuous and selective water detector system developed earlier. It was found that in the case of SO4 and HSO4-form resins two types of water binding (loosely and strongly-bound water) could be distinguished. The second step, the stronglybound water step, could not be observed in the DTG curves, because the release of the bound water and the decomposition of the fixed ionic group take place simultaneously. As the two types of water peaks strongly overlap, their quantitative evaluation was carried out by graphical analysis.

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