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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
Abstract 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.