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This paper presents a sequential injection analysis (SIA) system for sequential monitoring of Fe(II) and Fe(III), or NO 3- and NO 2- with typical concentrations of natural and waste waters. Determination of nitrite was based on the Griess-Ilosvay reaction, while the Fe(II) determination was based on the reaction with 1,10-phenantroline. Determination of Fe(III) and NO ...
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