Tintometer Lovibond MD100 Manual página 35

Hardness Calcium (B) T / M191
Hardness Calcium (B) T
20 - 500 mg/l CaCO
Murexide
Preperation
EN
1. Strong alkaline or acidic water samples should be adjusted between pH 4 and pH 10
before the analysis (use 1 mol/l Sulphuric acid or 1 mol/l Sodium hydroxide).
Notes
1. To optimise the readings, an optional batch-specific blind value method can be
performed (see photometer description).
2. For accurate results, exactly 10 ml of water sample must be used for the test.
3. This method was developed from a volumetric procedure. Due to undefined boundary
conditions, deviations from the standardised method may be greater.
4. The method works in the high measuring range with greater tolerances than in the
low measuring range. When diluting samples, always measure in the first third of the
range.
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3
EN Method Reference Book 1.0
M191
CAH