J. Planar Chromatogr. 3, 65-67 (1990). Description of a method for chromatographic separation of enantiomers involving chiral mobile phase additives. Amino acid derivatives and several alkaloids are separated by TLC on different types of RP plates using a mobile phase containing maltosyl-ß-cyclodextrin. Visualization under 254 nm UV. A comparison was made between octadecyl, diphenyl, and ethyl RP TLC plates.

Part III. J. Planar Chromatogr. 6, 282-288 (1993). Separation of selected hydroxy and amino acids into their enantiomers by TLC on a chiral stationary phase. Proposition of a new topological index which enables distinction between isomers of D and L configuration. Separation on Chir HPTLC plates (E. Merck) of D- and L-hydroxy acids (lactic, mandelic, hydroxyvaleric and hydroxycaproic acid) with acetonitrile - water 3:2, and of amino acids (methionine, valine, leucine, serine, and isoleucine) with methanol - water - acetonitrile 1:1:4. Detection of hydroxy acids by immersion into a solution (50 mg/100 mL) of thymolphthalein in ethanolic sodium hydroxide (0.1%) and of amino acids by immersion into 0.3% ninhydrin in acetone and heating at 110 °C for 10 min.

Jap. J. Chromatogr. (Kuromatogurafi) 14, 36-37 (1993). Evaluation of titania microbeads as a support material for TLC. Preparation of the titania TLC plates by spraying the slurry of titania gypsum particles suspended in water on glass plates and heating at 110 °C for 30-60 min. Use of the plates to resolve structural isomers of various aromatic compounds.

J. Planar Chromatogr. 10, 320-331 (1997). Discussion of the current state of chiral separations by TLC with particular reference to recent advances. The use of derivatizing reagents to produce diastereomers which can be resolved by conventional phases is described, together with the use of chiral TLC systems. These systems include those based on chiral stationary phases, phases modified by coating with a chiral selector, and chiral mobile phases. The examples provided illustrate the wide range of structural types which can be readily resolved into their enantiomers by planar chromatographic methods. Future directions of separations in TLC are also discussed.

J. Chromatogr. B 737 (1/2), 3-12 (2000). A two-step purification protocol was developed to purify the title proteins by anion-exchange chromatography and gel permeation chromatography. Assessment of the resultant pure solution of vitellogenin by silver staining electrophoresis and immunochemical characterization.

J. Planar Chromatogr. 19, 241-245 (2006). TLC of the enantiomers of the beta-blockers (+/-)-propanolol, (+/-)-metoprolol, and (+/-)-atenolol on silica gel impregnated with a Cu(II)-L-arginine complex in a glass chamber saturated for 20-25 min using different mixtures of acetonitrile, methanol, and water as mobile phases. Impregnated TLC plates were prepared by spreading a slurry of 50 g silica gel in a solution of 100 mL of the Cu(II)-L-arginine complex and activating the plates overnight at 60 °C. The Cu(II)-L-arginine complex was prepared by mixing 1 mM copper(II) acetate and 2 mM L-arginine in water - methanol 9:1 and adjusting the final pH to 6-7 with aqueous ammonia. Detection with iodine vapor. Successful separation of all three racemic drugs was achieved with acetonitrile - methanol - water 15:2:2 and 15:2:1.

Chromatographia 70 (5-6), 1001-1006 (2009). Chiral TLC of the enantiomers of atenolol, propranolol, and salbutamol by complexation with Cu(II) cation and five L-amino acids using different techniques: 1) using the Cu(II)-L-amino acid complex as chiral mobile phase additive with untreated silica gel plates, 2) by mixing the Cu-complex with silica gel before preparing the TLC plates, 3) by development with solutions of the Cu-complex on untreated silica gel plates, and 4) by using a solution of Cu(II) acetate as mobile phase additive for plates prepared by mixing the L-amino acid with silica gel. Detection of zones by exposure to iodine vapor.

J. Planar Chromatogr. 28, 248-250 (2015). TLC of phenylalanine, tyrosine and tryptophan on silica gel prepared by adding different concentrations of vancomycin with n-butanol - methanol - water - acetic acid 25:8:6:2. The best separations of the three racemic amino acids were achieved with more than 1.86 g of vancomycin in 25 g of silica gel. Vancomycin proved to be sufficiently stable and showed good enantioselectivity.