Spectrophotometric determination of trace aqueous sulfate using barium-beryllon II |
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Authors: | Hoon Hwang Purnendu K. Dasgupta |
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Affiliation: | (1) Department of Chemistry, Texas Tech University, Lubbock, Texas, USA |
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Abstract: | Summary The dibarium salt of beryllon II, 2-(8-hydroxy-3,6-disulfo-1-naphthylazo)-1,8-dihydroxynaphthalene-3,6-disulfonic acid is the basis of a sensitive (LOD 0.14 ppm) convenient Spectrophotometric procedure for determining trace sulfate through liberation of the dye in a 80% 2-propanol medium at an apparent pH of 4.3. The interferences are negligible and good agreement with ion Chromatographie results are demonstrated for environmental samples. |
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