EPA Method 9210A

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EPA Method 9210A:
POTENTIOMETRIC DETERMINATION OF NITRATE IN AQUEOUS SAMPLES WITH AN ION-SELECTIVE ELECTRODE

Summary:
Solubilized nitrate is determined potentiometrically using a nitrate ion-selective electrode (ISE) in conjunction with a double-junction reference electrode and a pH meter equipped with an expanded millivolt scale (mV), or an ISE meter capable of being calibrated directly in terms of nitrate concentration.

Scope:
This method may be used for measuring solubilized nitrate in drinking water, natural surface water, groundwater, domestic and industrial wastewater, soil extracts (ASTM Standards D 4646, D 5233 or D 3987) and aqueous extracts of other solids.

Report Number:
SW-846 Ch 5