Multi 9420
Ion concentration
ba75964e04
04/2015
59
6.3.2
Standard subtraction
In the "Standard Subtraction" procedure, a known amount of standard solution
is added to the sample (as complexing agent or precipitating agent) and, thus,
the ion concentration lowered.
The ion concentration in the sample is calculated from the change in potential.
Calibration
Measuring
1.
Select the measuring method (see section 6.3 S
2.
Prepare two standard calibration solutions.
3.
Perform a two-point calibration according to user guidance.
4.
The calibration record is displayed as soon as a stable value is
achieved for the second standard calibration solution.
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01.08.2013 08:00
#1 0.010 mg/l
20.2 mV 25.0 °C
#2 0.020 mg/l
79.2 mV 25.0 °C
Slp.: 54.1 mV
++ (Ion type: Ag)
CALIBRATION
ADA 94/IDS DIN
B092500013
5.
Start the measurement with
<F1>
/[
continue
].
An entry window appears.
6.
Prepare the sample.
7.
If necessary, add the ISA/TISAB solution to the sample.
8.
Thoroughly rinse the electrode with deionized water.
i
Immerse sensor in sample
Sample volume
100.0 ml
ISA/TISAB vol.
1.0 ml
continue
Standard subtraction
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