Ion chromatographic determination of acidity

Date

2000-05

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Publisher

Texas Tech University

Abstract

The practice of acidity measurements by volumetric titration has remained unchanged for over two centuries. Though optochemical methods may exist for measuring H* concentrations, none of these methods are capable of measuring large concentration ranges or are able to determine the concentration of multiple cations, in addition to H* (i.e., K+, NH4+, etc.), which may be of interest to the analytical chemist. The present work presents a new approach to acidity measurements based on cation exchange chromatography. A sulfonated styrenedlvinylbenzene based stationary phase is used to separate hydrogen ion from other monovalent cations. In addition, several factors that govern the direct determination of strong and weak acids were examined.

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