3 calibrating the fluoride ise, Calibrating the fluoride ise – Metrohm 781 pH/Ion Meter User Manual
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3.2 Determination of an ion concentration (only 781: Conc mode)
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1 pH/Ion Meter installation
•
Set up instrument
•
Connect stirrer
•
Connect electrodes
•
Mains connection
2 Initial configuration
•
Switch on pH/Ion Meter
•
Set dialog language
•
Set date/time
•
Set temperature sensor
3.2.3
Calibrating the fluoride ISE
1 Set method parameters in the Conc mode
•
Press <MODE> to enter the Conc mode
•
In the ion parameters (<PARAM>) set the concentration unit
to ppm with <SELECT>:
•
In the calibration parameters set the number of standards to 5
and define the concentrations:
CONFIG
ON/OFF
MODE
PARAM
PARAMETER Conc
> calibration parameters
no. of standards 5
addition: manual
conc.1 0.5 ppm
conc.2 2.5 ppm
conc.3 5.0 ppm
conc.4 25.0 ppm
conc.5 50.0 ppm
PARAMETER Conc
> ion parameters
conc.unit: ppm