Aquatrode plus
– combined LL pH glass electrode (6.0253.100) with
fixed ground sleeve diaphragm and double-junction reference system. Its new type
of membrane glass had especially been developed for pH measurement in weakly buffered
samples with low or high conductivity.
The
Aquatrode has a new developed fixed ground joint diaphragm.
The electrolyte flow is well defined thus minimising the
contamination
of the sample with reference electrolyte. The construction of
the glass membrane is so chosen that even in water with conductivities
under 10µS guarantees you as fast a response as possible.
The
pH glass membrane of the Aquatrode plus is made of a newly developed
special glass that is characterized by short response times and
excellent long-term stability.
Practical hints
pH measurement is temperature dependent. Don't forget to enter
the temperature value of your sample solution into the meter.
If the temperature changes during the measurement it is recommended
to use an Aquatrode Plus with integrated Pt 1000 temperature
sensor (6.0257.000).
Samples with a pH value over 4 should be measured under a nitrogen
atmosphere. The reason is the atmospheric CO2, which
makes the reading unstable. Caution: Don't pass the gas through
the sample due the pH drifts into alkaline ranges.
If the
sample has a conductivity under 200 µS/cm a ground-joint
diaphragm on your pH electrode is a necessity.
pH measurement in water – quite easy with Metrohm!
