NAVI D-25 Instruction Manual page 198

7 Reference
7.3 Ion measurement
When actual measurement is performed, the ION
electrode measures the ION concentration, so a linear
relationship forms between the value of the ION
concentration and the electrode potential, if the
concentration is plotted on a logarithmic axis, as shown
in Fig. 2. Conducting quantitative analysis using an ION
electrode requires either an ION meter that has an
antilog calculation function or the creation of a
calibration curve using similog graph paper.
Calibration curve for univalent positive ION electrode
Potential slope
Ion concentration (mg/L)
Fig. 2 Relationship between ION concentration and
electric potential
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