| A Mettler-Toledo DL 53 Titrator with a 10-mL burette was used for the incremental addition of the cationic polyelectrolyte as titrant. |
| In general, the titrant is placed in a volumetric glassware called a burette and added slowly to a known volume of analyte until the reaction is complete. |
| The end point was checked by one or two drops of titrant in excess to be sure that no further deepening of the purple takes place. |
| Reversed L shaped curve was obtained on plotting current against titrant volume. |
