title: Additional results on the value of the faraday.
abstract: Repetition of the authors' earlier high-precision coulometric titrations of 4-aminopyridine by the hydrazine-platinum anode and back-titration methods, at the National Bureau of Standards, has yielded a new value for the Faraday, almost identical with the earlier value but with lower uncertainty. The earlier value has been recalculated, using a new value for the density of 4-aminopyridine. The weighted average of the new and old values is 96486.57 1972 NBS coulombs per equivalent, the standard deviation of the mean being 0.48 coulombs per equivalent (4.9 ppm).
authors.affiliation: Department of Chemistry, Iowa State University, Ames, IA 50011, U.S.A.
authors.forename: W F
authors.initials: WF
authors.lastname: Koch
authors.forename: H
authors.initials: H
authors.lastname: Diehl