Collect. Czech. Chem. Commun.
2002, 67, 1173-1180
https://doi.org/10.1135/cccc20021173
Determination of Trace Nitrite by Differential Pulse Voltammetry Using Magnetic Microspheres
Ming Yang and Hu Lin Li*
Department of Chemistry, Lanzhou University, Lanzhou 730000, China
Abstract
A new type of magnetic polymer microspheres containing methylamino groups on the surface was synthesized. It can be reacted with nitrite to produce electroactive N-nitroso compound. On reduction of this derivative collected on the magnetic electrode, nitrite can be determined. Under optimum conditions, the peak potential (Ep) of the derivative is -0.72 V (vs Ag/AgCl). Nitrite in the range 1-800 μg l-1 can be determined, the detection limit being 0.5 μg l-1. The relative standard deviation for determination of 100 μg l-1 nitrite was 1.96%. The method was used in the determination of nitrite in water samples with satisfactory results.
Keywords: Nitrites; Voltammetry; Magnetic microspheres; Methylamino groups; Nitroso compounds; Electroreduction.
References: 16 live references.
