Application of thermometric titrations to the study of soil organic matter. I. Simple polyelectrolytes |
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| Authors: | Khaled Y Khalaf Patrick MacCarthy TW Gilbert |
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| Institution: | Department of Chemistry, University of Cincinnati, Cincinnati, Ohio U.S.A. |
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| Abstract: | An introduction to the technique of thermometric titrimetry is provided and its special potentialities for the study of humic substances are discussed. As a prelude to the investigation of the complicated humic systems, the relatively simple polyelectrolytes, PAA and PMA, were first studied. Thermometric titration of these polymeric acids with sodium hydroxide solution gave good end points. Thermometric titration of the salts of these acids with various transition metal ions gave end point breaks corresponding stoichiometrically to charge neutralization of the polyelectrolyte. These thermometric titrations involving the transition metal ions are compared with the corresponding nephelometric titrations. |
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