Sorption–Optical Determination of Nitrite Ions in Sea Water with Chromotrope 2B |
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| Authors: | V M Ivanov V N Figurovskaya N I Ershova A F Alyukaeva A G Tsytsarin |
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| Institution: | (1) Department of Chemistry, Moscow State University, Vorob'evy gory, Moscow, 119992, Russia;(2) Moscow Institute of Radioengineering, Electronics, and Automation, pr. Vernadskogo 78, Moscow, 117454, Russia;(3) State Institute of Oceanography, Kropotkinskii per. 6, Moscow, 119034, Russia;(4) Shirshov Institute of Oceanology, Russian Academy of Sciences, Nakhimovskii pr. 36, Moscow, 117997, Russia |
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| Abstract: | The Chromotrope 2B reagent was used as an analytical reagent for the direct determination of nitrite ions by sorption chromaticity measurements, diffuse reflectance spectrometry, and solid-phase spectrophotometry. The silochrom C-120 silica gel and the AV-17 anion exchanger were used as supports. Optimum conditions were found for the formation and sorption of Chromotrope 2B. The dependence of the chromaticity characteristics (chromaticity coordinates, lightness, color saturation, yellowness, and whiteness) on the concentration of nitrite ions was examined. The advantages of the use of chromaticity characteristics over the diffuse reflection coefficient were demonstrated. A procedure was developed for the test and sorption–optical determination of nitrite ions in sea water. |
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