Determination of nitrites and nitrates in drinking water using capillary electrophoresis

摘要: This work was concerned with developing an electrophoretic method for rapid determination of nitrites and nitrates in drinking water. The background electrolyte Tris-HCl buffer addition cetyltrimethylammonium chloride to reverse the electro-osmotic flow. Online preconcentration samples using field-amplified sample stacking provided detection limits 0.003 mg L−1 (i.e. 65 nM) 0.010 160 nitrates, which are sufficiently low quality control tested a concentration range corresponding real water differentiation between sufficient simultaneous at their concentrations order tenths units tens L−1. A number authors have neglected this important aspect when concentrating only on achieving lowest possible limits. Separation two analytes iodate as internal standard achieved three minutes. Total analysis time including preconditioning eight