Modification and validation of an analytical method for the simple determination of nitrate in seawater by reduction to nitrite with zinc powder

Electrocatalysts for Inorganic and Organic Waste Nitrogen Conversion

“…NO 3 – can generally be detected directly or indirectly, i.e., via reduction of NO 3 – into NO 2 – using a suitable catalyst such as Zn powder or vanadium­(III) chloride, , followed by the Griess assay. However, the latter method should be used with caution as it suffers from a comparatively high limit of detection of 500 ppb (∼10 μM), interferences with Fe 3+ , Cu 2+ , S 2– , or I – , and the need for careful control of reaction conditions such as temperature .…”