The sources of amine, carbonate, and silver impurities in tetrabutylammonium hydroxide were investigated, and techniques for their removal were evaluated. The stability of the base in water, isopropanol, tert-butyl alcohol, and pyridine was determined. Salt bridge systems were devised for acetene, isopropanol, tert-butyl alcohol, and pyridine. Titrations of weak and very weak acids using the glass indicating electrode were reproducible to within 2 to 5 mv.
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Marple et al. (1962) studied this question.