Hanna Instruments HI 901 - Manual (Page 135)

A3-3
APPENDIX 3
A3 MULTIPLE EQUIVALENCE POINTS (HI 902 only)
A3.1 Applicability Domain
In case of:
• determining the components concentration from a synthetic mixture (e.g. Mixture of
HCl, CH
3
COOH, NH
4
Cl).
• determining the concentration of a polyprotic acid in it’s titrable ionization stages
(e.g. H
3
PO
4
, two equivalence points in aquogenos medium).
A3.2 Perform a Multi-Equivalence Point Titration
With the information provided above, set up the method parameters as follows:
• Set the end point mode as equivalence end point (mV or pH).
• Set the number of equivalence points (up to 5 points) to be found.
• Select the end point determination (like in standard titration).
• Set the rest of method parameters and save the modification.