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9 Appendix
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9 Appendix
9.1 Saved buffer series
The temperature-dependent pH values of the important commercially
available pH buffer solutions are stored in the device for automatic buffer
recognition during pH calibration.
In addition to the Metrohm buffer solutions, other reference buffers are
also included in the tables.
CAUTION
Buffer quality
The precision of pH measurements mainly depends on the correct cali-
bration of the sensor. To do so, you should use clean and fresh buffer
solutions. A common cause of incorrect calibration is, for example, the
use of an old pH 10 or pH 12 buffer. The pH value of a buffer solution
may markedly deviate from the certified pH value of a new buffer solu-
tion as a result of the introduction of CO
2
from the air.
The following tables provide an overview of the stored pH(T) series:
NOTE
pH values printed in bold are the values for the reference temperature
of the respective buffer set.
pH values highlighted in italics are interpolated or extrapolated values.
The other pH values correspond to the manufacturer's specifications.
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