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

E. I. Danilina; K. A. Buskina

Authors

E. I. Danilina South Ural State University, Chelyabinsk, Russian Federation
K. A. Buskina South Ural State University, Chelyabinsk, Russian Federation

Keywords:

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

Abstract

Kinetic determination of hydroxylamine in soils by the initial rate method is based upon the reaction of neutral red with the nitrite ion, produced by oxidation of hydroxylamine with iodate in acidic media. The optimal conditions for determination are as follows: 0.3 mol L^–1H₂SO₄, 0.024 mol L^–1KIO₃, 6.92×10^–5 mol L^–1neutral red. Hydroxylamine can also be determined in mixtures with nitrite ion, if the nitrite content has been found separately at the same conditions without iodate. The calibration graphs are linear in the range (3–27) μmol L^–1 of NH₂OH and (4–46) μmol L^–1 of NO₂^–. The reproducibility errors are 3.3 % and 1.8%, the relative errors of determination prove to be 2.6 % and 2.1 %, for hydroxylamine and nitrite ion, respectively.

Author Biographies

E. I. Danilina, South Ural State University, Chelyabinsk, Russian Federation

кандидат химических наук, доцент, кафедра теоретической и прикладной химии

K. A. Buskina, South Ural State University, Chelyabinsk, Russian Federation

студентка кафедры экологии и химической технологии

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