Reduction of Nitrate to Nitrite by Using Zinc Powder for Determination of Total Nitrogen in Sea Water

Unique Elution Behavior of Bromide and Nitrate in Anion-Exchange Chromatography Using Aqueous Potassium Chloride Eluent Containing Cadmium or Zinc Ion

“…However, a high concentration of zinc ion was required in the eluent, and a reduction in the retention time of nitrate was not observed, in contrast to the case of cadmium-containing eluent. Metallic cadmium and zinc are used to reduce nitrate to nitrite for the spectrophotometric determination of nitrate in aqueous solutions; 2,11,12 therefore, this elution behavior might provide insight into the reduction mechanism of nitrate on these metals.…”