Potential Interferents; Conductivity; Dissolved Oxygen; Orp - In-situ Aqua TROLL 500 Operator's Manual

Potential Interferents

pH
Sodium salts

Dissolved Oxygen

Temperature, atmospheric pressure, salinity,
chlorinity

Ammonium

Celsium, Potassium, Thalium, pH, Silver, Lithium,
Sodium

Nitrate

Perchlorate, Iodide, Chlorate, Cyanide, Bromide,
Nitrite, Hydrogen Sulfide (bisulfite), Hydrogen
Carbonate (bicarbonate), Carbonate, Chloride,
Dihydrogen Phosphate, Hydrogen Phosphate,
Phosphate, Acetate, Fluoride, Sulfate

Ammonium, Chloride and Nitrate Interferent Concentrations

Ammonium
The table below lists concentrations of possible interfering ions that cause 10% error at various levels (in
ppm) of NH .
+
4
Ion
Celsium (Cs )
+
Potassium (K )
+
Thalium (TI )
+
pH (H )
+
Silver (Ag )
+
Lithium (Li )
+
Sodium (Na )
+
1-970-498-1500

Conductivity

Temperature

ORP

Ions that are stronger reducing agents than
hydrogen or platinum, e.g., chromium, vanadium,
titanium

Chloride

Hydroxide, Ammonia, Thiosulfate, Bromide,
Sulfide, Iodide, Cyanide
100 ppm NH
+
4
100
270
3100
pH 1.6
270,000
35,000
11,100
48
10 ppm NH
+
4
10
27
310
pH 2.6
27,000
3,500
1,100
1 ppm NH
+
4
1
2.7
31
pH 3.6
2,700
350
110
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