Selective influencing of the migration time of SO4(2-) by forming neutral species with Pb2+ in capillary zone electrophoresis.
Organic and inorganic anions are analyzed using capillary zone electrophoresis with indirect fluorescence detection. As electrolyte 2,5-dihydroxybenzoic acid is used. By adding Pb2+ to the electrolyte the migration time of SO4(2-) can be selectively influenced and the separation of Cl- and SO4(2-) considerably improved. The fluorescence intensity of 2,5-dihydroxybenzoic acid increases in the presence of Pb2+ up to a concentration of 6*10(-4) mol/L Pb2+. Limits of detection in the lower mumol/L range were obtained.
Groh
T
T
Fachbereich Chemie, Technischen Hochschule Darmstadt, Germany.
Bächmann
K
K
D000838:Anions; D002197:Capillary Action; D002712:Chlorides / Q000302:isolation & purification; D004586:Electrophoresis / Q000379:methods*; D005453:Fluorescence; D007854:Lead / Q000494:pharmacology*; D013431:Sulfates / Q000302:isolation & purification*
D000838:Anions; D002712:Chlorides; D013431:Sulfates; D007854:Lead