Conductimetric detection of anions of very weak acids by incomplete suppressed ion chromatography

Add time:08/09/2019    Source:sciencedirect.com

A novel method, incomplete suppressed conductimetric detection, has been developed for the determination of anions of very weak acids. The principle of the method was discussed. Theoretical considerations involved the choice of background conductance and its effect on linearity and detection limits. Results showed that for both arsenous acid and boric acid, the sensitivity was improved greatly with low background conductance, compared with the suppressed conductimetric method. With 250 mg/l boric acid, there were 261- and 1002-fold increases in peak height and peak area, respectively. Within the linear range of the detection, quantified by peak areas, the linear correlation coefficients were 0.9991 and 0.9985 for arsenous acid and boric acid, respectively.

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