Xylem ISE Electrodes Ca 60 - Handbuch (Seite 17)

17
The double electrode is now ready to measure.
Note The reference electrode must contain enough electrolyte
solution, so that the level of the electrolyte solution is
clearly higher than that of the test sample during the
measurement.
Calibration Calibrate according to the data given in the
operating manual of the measuring instrument and
the analysis specification.
Sample preparation
Add 2 % ISA/Ca solution. This sample conditioning
solution creates optimum conditions for measuring. It
provides a constant ionic strength and similar diffusion
potentials at the reference electrode in standard and test
sample.