Normally a combined pH glass electrode is only stored
in c(KCl) = 3 mol/L because it is then immediately ready
for use without prior conditioning of the diaphragm.
However, long-term storage in KCl solution damages the
glass membrane and causes increased response times. For
the pH glass membrane the optimal storage medium would
be distilled water, but after such storage the diaphragm
would have to be conditioned for several hours.
The new 6.2323.000 Storage Solution (patent pending)
has been developed to solve this very problem. If
a combined pH glass electrode is kept in this solution
then the
performance
of the glass membrane does not change with respect to
the response time and the alkali error. If c(KCl) = 3
mol/L
is additionally used as the reference electrolyte then
the optimized composition of the storage solution guarantees
that the pH glass electrode is always ready for immediate
use. Conditioning prior to the measurement is not necessary,
no matter how long the electrode has been stored.
> Product Information
> pH electrodes |
