title: Measurement of pH by NMR Spectroscopy in Concentrated Aqueous Fluoride Buffers.
abstract: An NMR spectroscopic technique has been developed to give rapid, accurate pH measurements on tenth-milliliter samples of concentrated acidic aqueous solutions buffered by fluoride ion in the pH 1.5 - 4.5 range. The fluoride (19)F chemical shift has been calibrated as a function of pH at 0.1 and 1.0 M concentration by reference to an internal 3-fluoropyridine standard. Subsequent measurements of fluoride buffer pH required no additives and only two NMR spectra in the presence of an external reference standard.
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave, Madison WI USA 53706-1322.
authors.forename: James B
authors.initials: JB
authors.lastname: Gerken