Abstract
A potentiometric titration method for the direct determination of anionic polyelectrolytes using a plasticized poly(vinyl chloride) membrane electrode is described. A cationic surfactant solution is used as titrant. The method is based on ion association between the anionic polyelectrolyte in the sample and the cationic surfactant in the titrant. The end-point is detected as a sharp potential change due to an increase in the concentration of the free cationic surfactant at the equivalence point. The sharpness of the titration curve at the end-point is compared for several cationic surfactants; a solution of stearyltrimethylammonium ion has been found to be superior.
| Original language | English |
|---|---|
| Pages (from-to) | 538-540 |
| Number of pages | 3 |
| Journal | Fresenius' Journal of Analytical Chemistry |
| Volume | 358 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1997 |
| Externally published | Yes |
ASJC Scopus subject areas
- Biochemistry