Abstract
This study concerned the simultaneous differential determination of mixed inorganic and organic acid by nonaqueous conductometric titration with sodium tetrahydroborate, which was dissolved in N, N-dimethylformamide(DMF). The inflection points were found on conductometric titration curves of a mixed solution of organic and inorganic acid in DMF; they were caused by a difference in the acidity or reactivity. The acid concentration of each of mixed acid was successfully determined simultaneously by the present method. We attempted to identify the ions in the DMF solution and the resulting precipitates during the course of titration by fast atom bombardment mass spectrometry (FAB-MS) and fourier-transform infrared spectroscopy (FT-IR). The determination limit was about 0.01 M by this method.
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