The accuracy and traceability of your pH calibration solution will determine the accuracy of your pH measurement.
Commercial buffers are usually traceable to a reference standard developed by national standards laboratories such as DIN (Deutsche Institute für Normung) or NIST (National Institute of Standards and Technology).
Traceable pH buffers mean that, for example, DIN or NIST standard buffer solutions have been used to calibrate the pH meter that is involved in the manufacturing process of the buffers.
which are traceable to a common reference are comparable. If you can't
compare a measurement result, the result itself is meaningless.
Traceability of your pH measurements enables your results to be compared
across space and time, meaning that it is possible to compare
measurements made a year ago, anywhere in the world, with measurements
Traceability is essential to guarantee your pH measurement reliability and for calculating the uncertainty.
Remember, the accuracy of your pH measurement can never be better than the accuracy of the used calibration solution.
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