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  • 1
    ISSN: 0935-6304
    Keywords: Liquid chromatography, HPLC ; Simple analytical procedure for separation of enantiomers ; L-Phenylalanine-copper and L-proline-copper complex used as chiral reagents in the mobile phase ; α-Methyldopa, tryptophan, thyroid hormones ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Simple procedures are presented for separating the enantiomers of α-methyldopa, 5-hydroxytryptophan, tryptophan, triiodothyronine and thyroxine, which require neither special sorbents nor difficult-to-obtain or unstable reagents.The method for α-methyldopa, 5-hydroxytryptophan and tryptophan is based on the use of L-phenylalanine copper complex as the chiral constituent of the mobile phase; LiChrosorb® RP-18 serves as the stationary phase. The procedure for triiodothyronine and thyroxine is grounded on the L-proline copper complex as the chiral reagent and LiChrosorb® Si 60 as the stationary phase.In all observed cases, the D-enantiomer is eluted prior to the respective L-enantiomer. Chirality inversion of the mobile phase (application of the D-phenylalanine copper complex) reverses the order of elution; a racemic eluent (DL-phenylalanine copper complex) leads to no separation. In addition to the enantiomers of α-amino acids, the enantiomers of α-hydroxy acids (mandelic acid) can be separated.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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