Metrohm NH3-selective electrodes - Manual (Page 10)

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4 ￭￭￭￭￭￭￭￭
NH
3
-selective electrodes
3 Selecting the electrode
In the following you will find a list of criteria that is intended to make it
easier for you to select the correct electrode:
6.0506.100, 6.1255.000 6.0506.150, 6.1255.050
5 · 10 –6 …10 –2 mol/L 10 –4 …1 mol/L
Clean sample (e.g. drinking water,
boiler feed water or mineral
water) Sewage sample
Long-term measurement, moni-
toring
More rapid response time close to
the detection limit More rapid regeneration time
after high concentrations
Lower detection limit Better signal stability with higher
concentration
Complete membrane modules for
simple replacement Less expensive replacement of
contaminated membranes (e.g.
oleaginous sewage)
Membrane module individually
tested and certified Replacement membranes without
certificate