Determination of Trace Nitrite by Single Sweep Polarography

Abstract

Abstract: In acidic medium(pH=2), there is a well-defined single sweep polarographic wave of nitrite complex containing NO which can be used for determining trace nitrite. The complex can be strongly adsorbed on the surface of the mercury electrode, the polarographic wave is attributed to the reduction of NOin the adsorbed complex compound to hydroxylamine. The linear range of the polarographic wave is from 1×10^-8to 8×10^-7mol/Land the detection limit is 5×10^-9mol/L. Most common ions show no or a little effect on the determination. This method is applied to the analysis of water, foods and nitrate samples.

Key words: Complex, Polarography, Nitrite, Thiocyanate, Cobaltous ion

TrendMD:

Gao Zhi-qiang, Li Pei-biao, Zhao Zao-fan . Determination of Trace Nitrite by Single Sweep Polarography[J]. Chem. J. Chinese Universities, 1991, 12(3): 329.

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Determination of Trace Nitrite by Single Sweep Polarography

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