The flow-injection procedure based on nitrate reduction by copperized-cadmium filings followed by the formation of an azo dye with nitrite was adopted as reference for the analysis of nitrate in the water samples[17].
The flow-injection procedure based on nitrate reduction bycopperized-cadmium filings followed by the formation of anazo dye with nitrite was adopted as reference for the analysisof nitrate in the water samples[17].