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Peer reviewedPenteado, Jose C.; Angnes, Lucio; Masini, Jorge C.; Oliveira, Paulo C. C. – Journal of Chemical Education, 2005
This article describes the reaction between nitrite and safranine O. This sensitive reaction is based on the disappearance of color of the reddish-orange azo dye, allowing the determination of nitrite at the mg mL-1 level. A factorial optimization of parameters was carried out and the method was applied for the quantification of nitrite in…
Descriptors: Science Activities, Science Education, Laboratory Experiments, Spectroscopy
