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 plus 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 780 pH meter has an automatic electrode check, which gives
you information about the state and performance of your electrode
at any time.
Automatic stirrer control through the 780 pH Meter Metrohm
Serial Bus (MSB) interface.
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!
