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Enantioseparation of tartaric acid by ligand-exchange capillary electrophoresis using contactless conductivity detection

R. Knob, J. Petr, J. Sevčík, V. Maier,

. 2013 ; 36 (20) : 3426-31.

Jazyk angličtina Země Německo

Typ dokumentu hodnotící studie, časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/bmc14064036

A method for the determination of tartaric acid enantiomers using CE with contactless conductivity detection has been developed. Cu(II) as a central metal ion together with L-hydroxyproline were used as a chiral selector, the BGE was composed of 7 mM CuCl2, 14 mM trans-4-hydroxy-L-proline, and 100 mM ε-aminocaproic acid; the pH was adjusted to 5 by hydrochloric acid. Separation with a resolution of 1.9 was achieved in 9 min in a polyacrylamide-coated capillary to suppress the EOF. Various counterions of the BGE were studied, and migration order reversal was achieved when switching from ε-aminocaproic acid to L-histidine. With detection limits of about 20 μM, the method was applied to the analysis of wine and grape samples; only L-tartaric acid was found.

Citace poskytuje Crossref.org

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