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 reagents solutions from commercial test kits for aquaria, where the amount of heavy metal waste is eliminated and provides the advantages of SIA with small sample sizes and rapid sample throughput and the results compared to conventional spectroscopic manual measurements.

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

2019 Spring National Meeting

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