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      Effect of perfluorinated surfactant as additive of background electrolyte for capillary electrophoresis of inorganic cations

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          Summary

          This study reports the effect of a nonionic perfluorinated surfactant, N-polyoxyethylene- N-propyl perfluorooctane sulfonamide (PFOSA), as additive of background electrolyte on capillary electrophoresis (CE) of common inorganic cations. The association constants ( K ass) for PFOSA estimated from the electrophoretic mobility of analyte cations were the order of Mg 2+ > Ca 2+ > Sr 2+ > K + ≈ NH 4+ > Na + ≈ Li +. The K ass values were larger than those for zwitterionic and nonionic surfactants with hydrocarbon moiety. Use of PFOSA made another essential contribution to the determination of inorganic cations in a protein-containing sample. This was considered because high solubility of PFOSA for proteins functioned as suppressor for protein adsorption to the capillary wall. Four inorganic cations, Na +, K +, Mg 2+, and Ca 2+, in human saliva sample were successfully determined by sample injection without any pretreatments except for filtration and dilution.

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          Author and article information

          Journal
          1326
          121093
          Acta Chromatographica
          A Sponsored Open Access Journal on Chromatography
          Acta Chromatographica
          Akadémiai Kiadó, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic Publishers B.V.
          1233-2356
          2083-5736
          1 December 2012
          : 24
          : 4
          : 529-542
          Affiliations
          [ 1 ] Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu, 376-8515, Japan
          Author notes
          [] +81-277-30-1271, +81-277-30-1271, mori@ 123456gunma-u.ac.jp
          Article
          2
          10.1556/AChrom.24.2012.4.2
          a3e265a4-2ade-4b86-a79c-bda6cb5e958c
          History
          Categories
          Original Research Papers

          Materials properties,Nanomaterials,Chemistry,Nanotechnology,Analytical chemistry,Thin films & surfaces
          inorganic cations,capillary electrophoresis,nonionic perfluorinated surfactant,association constant

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