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Chiral separation of benzoporphyrin derivative mono‐ and diacids by laser induced fluorescence‐capillary electrophoresis
Author(s) -
Peng Xuejun,
Sternberg Ethan,
Dolphin David
Publication year - 2002
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/1522-2683(200201)23:1<93::aid-elps93>3.0.co;2-h
Subject(s) - capillary electrophoresis , laser induced fluorescence , fluorescence , chromatography , electrophoresis , capillary action , derivative (finance) , chemistry , analytical chemistry (journal) , materials science , optics , physics , financial economics , economics , composite material
A method for the separation of benzoporphyrin derivative mono‐ and diacid (BPDMA, BPDDA) enantiomers by laser induced fluorescence‐capillary electrophoresis (LIF‐CE) has been developed. By using 300 m M borate buffer, pH 9.2, 25 m M sodium cholate and 10% acetronitrile as electrolyte, +10 kV electrokinetic sampling injection of 2 s and an applied +20 kV voltage across the ends of a 37 cm capillary (30 cm to the detector, 50 νm ID), all six BPD stereoisomers were baseline‐separated within 20 min. Formation constants, free electrophoretic and complexation mobilities with borate and cholate were determined based on dynamic complexation capillary electrophoresis theory. The BPD enantiomers can be quantitatively determined in the range of 10 –2 –10 –5 mg mL –1 . The correlation coefficients ( r 2 ) of the least‐squares linear regression analysis of the BPD enantiomers are in the range of 0.9914–0.9997. Their limits of detection are 2.18–3.5×10 –3 mg mL –1 . The relative standard deviations for the separation were 2.90–4.64% ( n = 10). In comparison with high‐performance liquid chromatography (HPLC), CE has better resolution and efficiency. This separation method was successfully applied to the BPD enantiomers obtained from a matrix of bovine serum and from liposomally formulated material as well as from studies with rat, dog and human microsomes.