title: Resolution of enantiomers of DL-amino acids on silica gel plates impregnated with optically pure (-)-quinine.
abstract: TLC resolution of enantiomers from racemic amino acids was achieved on silica gel plates impregnated with optically pure (-)-quinine. The successful solvent systems were butanol-chloroform-acetic acid (3:7:5, v/v) for DL-methionine; 6:8:4, v/v for alanine; 10:1:4; v/v for threonine; and ethyl acetate-carbon tetrachloride-propionic acid (10.5:6.5:3.5, v/v) for valine. Minimum detection limits were found to be different for each of the amino acid, ranging between 0.9 and 3.7 microg. The effects of concentration of impregnating reagent, temperature and pH on resolution of enantiomers have been studied in details.
authors.affiliation: Department of Chemistry, University of Roorkee, Roorkee 247 667, India.
authors.forename: R
authors.initials: R
authors.lastname: Bhushan
authors.forename: M
authors.initials: M
authors.lastname: Arora
mesh_terms: D000085:Acetates; D019342:Acetic Acid; D000409:Alanine / Q000302:isolation & purification; D000596:Amino Acids / Q000302:isolation & purification*; D000440:Butanols; D002251:Carbon Tetrachloride; D002725:Chloroform; D002855:Chromatography, Thin Layer / Q000295:instrumentation / Q000379:methods*; D008715:Methionine / Q000302:isolation & purification; D011422:Propionates; D011803:Quinine; D058428:Silica Gel; D012822:Silicon Dioxide; D012997:Solvents; D013237:Stereoisomerism; D013912:Threonine / Q000302:isolation & purification; D014633:Valine / Q000302:isolation & purification
chemical_list: D000085:Acetates; D000596:Amino Acids; D000440:Butanols; D011422:Propionates; D012997:Solvents; D013912:Threonine; D058428:Silica Gel; D012822:Silicon Dioxide; C007650:ethyl acetate; D002725:Chloroform; D011803:Quinine; D008715:Methionine; D002251:Carbon Tetrachloride; D014633:Valine; C029658:propionic acid; D000409:Alanine; D019342:Acetic Acid