LaMotte STORMWATCH MS4, Руководство пользователя

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6
Test Factor Methodology Action Level
Ammonia
Nitrogen
Ammonia forms a colored complex with Nessler’s
Reagent in proportion to the amount of ammonia
present in the sample. Rochelle salt is added to
prevent precipitation of calcium or magnesium in
undistilled samples.
≥ 50 mg/L
Color Color is determined by a meter that has been
calibrated with colored standards of known
platinum cobalt concentration. True color, the
color of water in which the turbidity has been
removed, is measured.
≥ 500 color units
Conductivity Conductivity is determined by measuring the
amount of current conducted by ions in the
sample.
≥ 2000 μ S/cm
Hardness Calcium and magnesium are titrated with EDTA
at a pH controlled by the addition of a buffer. An
indicator shows the equivalence point.
≤ 10 mg/L as
CaCO
3
or ≥ 2,
000 mg/L as
CaCO
3
pH The pH meter measures the difference in
potential between the electrode and the reference
electrode and converts the reading to pH units.
≤ 5 or ≥ 9
Potassium Potassium reacts with sodium tetraphenylborate
to form a colloidal white precipitate in quantities
proportional to the potassium concentration.
≥ 20 mg/L
Turbidity The intensity of a light beam passing through
a turbid sample is compared with the intensity
of a light beam passing through a turbidity-free
sample at 180 degrees from the light source.
≥ 1,000 NTU