Abstract
A colorimetric method was developed for the determination of trace nitrates in solutions containing up to 50 g 1−1 of sodium chloride. Beer's law applies, in such solutions for concentrations of up to 1 mg of NaNO3 per liter. Effects of sodium chloride concentration and time on the development of color were quantitatively evaluated with an overall error of about 4%. Temperature effects on solutions analyzed were found to be a major cause of inconsistencies in this otherwise satisfactory method.
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Petriconi, G.L., Papee, H.M. On routine colorimetric determination of trace nitrates, by brucine, in the presence of chloride. Water Air Soil Pollut 1, 42–49 (1971). https://doi.org/10.1007/BF00280778
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DOI: https://doi.org/10.1007/BF00280778