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N. M. Sorokina, S. V. Novikova, I. A. Kovalev, G. I. Tsysin
Indirect
flow-injection atomic-absorption determination of nitrate in solutions using
the reaction of indium oxidation
Abstract
Optimal conditions for flow-injection
atomic absorption determination of nitrate in solutions using the reaction of
indium oxidation had been found. The detection limit of nitrate of 3×10-6 M,
relative standard deviation of 0,02 and sampling frequency of 120 per hour were
achieved. There is no influence for the determination of 5×10-5 M
nitrate in the presence of the following divisible amounts of ions (M): NH4+
- 1000; Na+, Mg2+, Zn2+, Cl- - 100;
Ca2+, PO43-, EДTA - 10. The comparable (with
nitrate) amounts of NO2-, Fe3+, Cu2+
were increased the results of nitrate determination.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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