High Performance Ion Chromatography Determination of Nitrite and Nitrate in Foodstuffs

Abstract
An alternative chromatographic method has been developed to selective and simultaneous detection of nitrite and nitrate in the presence of chloride, based on the use of an anion-exchange polymethacrylate column with 5mM phosphate buffer as eluent and ultraviolet absorbance at 214 nra as detection procedure. The detection limit was 0.5 μg/ml for both anions. This method was shown to be applicable to the analysis of several foodstuffs.