Standard Addition (Std Add) - wtw inoLab Level 3 Operating Manual

Ion concentration
116
10 Select the ISE Adv. menu item with
11 Confirm the ISE Adv. menu item with
The menu with the measuring methods opens.
12 Select a method with
13 Confirm the method with
Measurement with the selected method begins.
7.4.2

Standard Addition (Std Add)

In the "Standard addition" procedure, a known amount of
standard solution is added to the sample.
The ion concentration in the sample is calculated from the
change in potential.
1 Select the measuring method (see section 7.4.1).
2 Prepare two standard calibration solutions.
3 Perform a two-point calibration according to the user
guidance.
4 As soon as a stable value for the second standard
calibration solution is reached, the
display indicator
the electrode is displayed after the two-point
calibration. The probe symbol shows the electrode
evaluation after the two-point calibration.
82
.
g
.
h
stops flashing. The slope (mV) of
82
.
g
.