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METHOD PROCEDURE

Note: For wastewater or seawater samples, before performing measurements,

distillation is required.

INTERFERENCES

Interference may be caused by:

• Alkalinity above 5000 mg/L CaCO

• Chloride above 700 mg/L

• Sulfate above 200 mg/L

• Orthophosphate above 16 mg/L

• Aluminum above 0.1 mg/L

• Iron (Ferric) above 10 mg/L

• Sodium hexametaphosphate above 1.0 mg/L

• Highly-colored and turbid samples may require distillation

• Highly-alkaline samples can be neutralized with nitric acid

Hanna Instruments HI97739 User Manual

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