Optimization of Zinc-Cadmium Reduction Method for Determination of Nitrate in Seawater

The linear of nitrate standard curve and blank values were ​​affected by many factors such as blank water quality, temperature, etc. The seawater determination of nitrate optimization methods in this paper based on the GB "marine monitoring specification (seawater analysis)"GB12763.4-2007. It indicated that doubly distilled water with excellent pure sodium chloride for preparation of artificial seawater produce a good linear of standard curve and lowest blank value at 20 °C -25 °C.