Single-point titrations: Part-I. The determination of bases |
| |
Authors: | Gillis Johansson Wilbert Backen |
| |
Affiliation: | Department of Analytical Chemistry, University of Umeå, S-901 87 UmeåSweden |
| |
Abstract: | Equations are derived for the calculation of acid mixtures, which upon titration with base show a linear relation between pH and the amount of base. Three to five weak acids were used and a linearity of better than ±0.02 pH units was obtained. The use of such mixtures for analysis of the base content of samples by means of a single pH measurement is described. A procedure for obtaining conditional pKa values of the components of the acid mixture is also described. The single-point titration method is advocated for use when better accuracy than that of direct potentiometry is desired but less than that of an ordinary titration can be accepted. It is not necessary to know the pKb or the number of weak bases. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |