PrimeLab 1.0 MULTITEST User Manual page 227

pH-value (MR)
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Continued...
Note(s)
-> Use of this test procedure and reagent on water samples with pH value
outside of the 6.5 - 8.4 range can lead to incorrect test results. If you are not
sure we recommend a control measurement using e.g. an electronic meter
(pH 0-14).
-> If the alkalinity (or carbonate hardness) of your water sample is lower than
KS4.3 = 0.07 mmol/l (= 35 mg/l CaCO3) this can lead to incorrect test
results.
-> Depending on the salt content of your sample, the measurement result must
be manually corrected according to the following scheme:
1 molar = -0.21 pH
2 molar = -0.26 pH
3 molar = -0.29 pH
with: 1 mol of salt (NaCl) = 5.8% = 58.4 g/l
194
6.5 - 8.4
Name on device: 38-pH-MR-tab
(pH) Tablet
194