Kinetic spectrophotometric determination of hydroxylamine and nitrite ion in a mixture by their reactions with neutral red

Елена Ивановна Данилина, Кристина Андреевна Бускина

Аннотация


Кинетическое определение гидроксиламина в почвах методом тангенсов основывается на реакции нейтрального красного с нитрит-ионом, получающимся при окислении гидроксиламина иодатом в кислых средах. Оптимальные условия определения: H2SO4 0,3 М, KIO3 0,024 М, нейтральный красный 6.92×10–5 М. Гидроксиламин можно также определять в смесях с нитрит-ионом, если найти содержание нитрита по отдельности в тех же условиях, без иодата. Градуировочные графики линейны в диапазоне (3–27) мкмоль/л NH2OH и (4–46) мкмоль/л NO2–. Погрешности воспроизводимости 3,3 % и 1,8 %, относительные погрешности определения – 2,6 % и 2,1 %, для гидроксиламина и нитрит-иона, соответственно

hydroxylamine, nitrite ion, kinetic analysis, initial rate method, neutral red, iodate ion, soil analysis. 

Ключевые слова


hydroxylamine; nitrite ion; kinetic analysis; initial rate method; neutral red; iodate ion; soil analysis

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Литература


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