Comparative analysis methods determinig of nitrates concentration in water
2005
Rutkoviene, V. (Lithuanian University of Agriculture, Akademija, Kaunas distr. (Lithuania)), E-mail: [email protected] | Grazuleviciene, V. (Lithuanian University of Agriculture, Akademija, Kaunas distr. (Lithuania)), E-mail: [email protected] | Cesoniene, L. (Lithuanian University of Agriculture, Akademija, Kaunas distr. (Lithuania)), E-mail: [email protected]
Nitrates concentration in water solutions is measured by spectrometric, reduction of nitrates to nitrites, chromatography of ions exchange, potentiometric and other methods. They differ in number of operations for analysis, complication, equipment and required staff qualification. The aim of this research - to compare accuracy of different methods for nitrates ions measurement in water solutions. Three methods have been chosen: determination of nitrates concentration by spectrometric method with sodium salicylate, determination of nitrates concentration by spectrometric method with 4-fluorfenol after distillation and potentiometric method. The model solutions, in which concentrations of nitrate ions were close to the concentrations in the water of dug wells, were used in the research. Different risk factors typical for particular method concerned with sample preparation, apparatus work particularity and influence on the results' correctness were estimated. Statistical analysis of results was done
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