Selective influencing of the migration time of SO 4  2−  by forming neutral species with Pb 2+  in capillary zone electrophoresis | Zendy

Groh Thomas | Zendy; Bächmann Knut | Zendy

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Selective influencing of the migration time of SO 4 2− by forming neutral species with Pb 2+ in capillary zone electrophoresis

Author(s) -

Groh Thomas,

Bächmann Knut

Publication year - 1992

Publication title -

electrophoresis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.666

H-Index - 158

eISSN - 1522-2683

pISSN - 0173-0835

DOI - 10.1002/elps.1150130196

Subject(s) - capillary electrophoresis , chemistry , electrolyte , electrophoresis , fluorescence , chromatography , detection limit , capillary action , analytical chemistry (journal) , materials science , electrode , physics , quantum mechanics , composite material

Organic and inorganic anions are analyzed using capillary zone electrophoresis with indirect fluorescence detection. As electrolyte 2,5‐dihydroxybenzoic acid is used. By adding Pb 2+ to the elctrolyte the migration time of SO 4 2− can be selectively influenced and the separation of C1 − and SO 4 2− considerably improved. The fluorescence intensity of 2,5‐dihydroxybenzoic acid increases in the presence of Pb 2+ up to a concentration of 6*10 −4 mol/L Pb 2+ . Limits of detection in the lower μmol/L range were obtained.

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