Nitrate is traditionally measured via sensitive yet cumbersome and tedious colorimetric techniques employing a Copper-Cadmium reduction column.  Analysis by Nitrate Ion Selective Electrode (ISE) coupled with flow injection analysis coupled can provide a rapid and automatable procedure for but unfortunately Chloride ions interfere significantly. Precipitation of Chloride as insoluble Silver Chloride has been used to remove Chloride ions from solution enabling the use in brackish water samples. This approach is very expensive. This work reports the investigation of using Sequential Injection Analysis SIA)with Cu/Cd reduction where the amount of heavy metal waste is greatly minimized due to the advantages of SIA with small sample sizes and rapid sample throughput and the results compared to a batch nitrate reductase technique. Also the use of nitrate reductase in the SIA method is under investigation.<br/>

Investigation of the sequential flow analysis and the use of nitrate reductase and for the determination of nitrate in sea water and salt water aquaria

253rd National Meeting (2017)

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