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pH/ION 7320 Ion concentration
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8.3.3 Sample addition
In the "Sample addition" procedure, a known amount of sample is added to the
standard solution.
The ion concentration in the sample is calculated from the change in potential.
Calibration
Measuring
1. Select the measuring method (see section 8.3 S
ELECTING THE MEASUR
-
ING METHOD
, page 53).
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.
CALIBRATION
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#1 0.010 mg/l
20.2 mV 25.0 °C
#2 0.100 mg/l 79.2 mV 25.0 °C
Slp.: 59.0 mV
++ (Ion type: Ag)
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Continue
USB output
5. Start the measurement with <F1> /[ Continue ].
An entry window appears.
6. Prepare the standard solution.
7. If necessary, add the ISA/TISAB solution to the standard solution.
8. Thoroughly rinse the electrode with deionized water.
9. Immerse the electrode in the standard.
10. Using <

> <

> and <MENU/ENTER> , enter the values for the vol-
ume of the standard solution ( Std. volume ), the concentration of the
standard solution ( Std. conc. ) and the volume of the ISA/TISAB solu-
tion ( ISA/TISAB vol. ).
i
Immerse sensor in standard
Std. volume 100.0 ml
Std. conc. 1.0 mg/l
ISA/TISAB vol. 1.0 ml
Continue
Sample addition
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