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pH meters are used to access the alkalinity and / or acidity of fluids in a variety of laboratory procedures. These include:
To assess these general laboratory applications, aqueous EQA material with a pH covering a wide range of pH from 2 to 12 is used.
Clinical applications may also include:
To assess these clinical applications, EQA material with a narrower range of 5.0 to 7.8 is used.
Three liquid stable samples are distributed monthly with a minimum of 36 samples distributed over the year covering a wide analytical and clinically relevant range. The samples consist of a panel of 12 samples, each distributed on 3 occasions over that period. This allows for the assessment of laboratory and method performance, including linearity, bias, within and between batch imprecision.
|pH Meter Programme|
|Analyte||Approx. Range Covered|
|pH||2.0 – 12.0|