Hach-Lange TITRALAB 840_845 Reference Manual - Manual (Page 43)

Titra Lab ® TitraLab 840 and 845 Reference Manual
Page 43
Back reagent =
Titrant The reagent used for the back titration is the same as the titrant used
for the titration.
Press
✓ and define a back reagent different from the titrant in the
Parameters screen of the method.
Back reagent
unknown The method uses a back reagent which has not been defined.
Press
✓ and enter a back titration ID in the Parameters screen of the
method.
Back titration An excess of reagent is added to the sample and after a short time, the
excess is then back-titrated using the titrant.
In volumetric analysis, back titrations are useful when a direct titration
runs too slowly.
Back titration -
ID Name of the excess reagent to be added during the titration. This
name is entered directly using the keypad (max. 20 alphanumeric
characters), with the unit (mM, M, mN or N).
Enter in:
Edit method > Parameters menu (back titration method)
Back titration
No/Manual/
Automatic Back titration = No
This is a direct titration.
Back titration = Manual
This is a back titration where the excess reagent is added using a
separate burette or a pipette not controlled by the Titration Manager.
This reagent is defined using its titre and volume in the Parameters
screen. This reagent is not selected in the Reagent library.
Back titration = Automatic
Option available with TitraLab 845.
This is a back titration where the excess reagent is added using a
second burette controlled by the Titration Manager. This second
burette is installed on the Titration Manager.
The excess reagent is created or selected from the User list.
Enter in:
Edit method > Parameters menu