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Enantioseparation of baclofen with highly sulfated β‐cyclodextrin by capillary electrophoresis with laser‐induced fluorescence detection
Author(s) -
KavranBelin Gamze,
Rudaz Serge,
Veuthey JeanLuc
Publication year - 2005
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200500100
Subject(s) - baclofen , derivatization , chemistry , chromatography , cyclodextrin , protein precipitation , enantiomer , capillary electrophoresis , calibration curve , detection limit , high performance liquid chromatography , organic chemistry , biochemistry , agonist , receptor
The enantioseparation of baclofen (4‐amino‐3‐ p ‐chlorophenylbutyric acid) was achieved by CE‐LIF with highly sulfated β‐CD (HS‐β‐CD) as chiral selector. Naphthalene‐2,3‐dicarboxaldehyde was used for the derivatization of nonfluorescent baclofen. HS‐β‐CD (2%) containing 50 mM borate buffer at pH 9.5 was chosen as the optimal running electrolyte and applied to the analysis of baclofen enantiomers in human plasma. The linearity of calibration curves ( R 2 ⪈ 0.998) for R ‐(–) and S ‐(+)‐baclofen was in the 0.1–2.0 μM concentration range. After a simple ACN‐protein precipitation, the LOD of baclofen in plasma sample was found as low as 50 nM.