Using Periodate with Nitrite Solutions for Capillary Electrophoresis

摘要

In the article "Determination of Nitrate and Nitrite in Water by Capillary Electrophoresis" (1), Hage et al. describe a method for analyzing both nitrate and nitriate using this relatively recent technique (CE). Nitrite solutions are oxidized to nitrate by such oxidants as permanganate or peroxides. Using sodium periodate, a strong oxidizer, as internal standard is therefore a potential problem. Thus, one can argue that when no nitrites appear in an assay this might be due, apart from the sensitivity of detection, to the oxidation of nitrite during sample preparation and the CE procedure.