J. Planar Chromatogr. 6, 492-494 (1993). TLC of a, ß, g, d-tocopherols on Kieselguhr, impregnated with a 10% solution of paraffin oil in benzene, and methanol - water mixtures 17:3, 9:1. 19:1. Visualization with a mixture of equal volumes of dipyridyl in methanol 19:2:1. Detection under UV 254 nm.

J. Planar Chromatogr. 7, 322-326 (1994). Chromatography of derivatized DL amino acids on RP-18 with eluents based on 0.1 M phosphate buffer containing 20% acetonitrile + 3% NaCl with the addition of various ß-cyclodextrins. Influence of urea content, influence of organic solvent, and influence of pH studied; discussion of the stability constants of complexes formed.

J. Planar Chromatogr. 10, 222-224 (1997). HPTLC of R-(+)- and S-(-)-pindolol enantiomers (after derivatization with 2,3,4,6-tetra-O-acetyl-b-D-glucopyranosylisothiocyanate) on RP-8 silica with distilled water - 2-propanol 7:3. Quantification by densitometry at 256 nm (absorbance).

J. Liqu. Chromatogr. 23, 2715-2726 (2000). TLC of aminoglutethimide, acetylaminoglutethimide, and dansylaminoglutethimide on silica gel using chiral selectors , including native CD (a, b, and g), and b-CD derivatives. The best results in terms of resolution, analysis time, and separation factor were obtained with aqueous 30 % (2-hydroxy-3-trimethylpropylammonium-b-cyclodextrin) - methanol 1:1 for both racemic aminoglutethimide and acetylaminoglutethimide. Visualization under UV 254 nm.

An improved analytical procedure. J. Planar Chromatogr. 17, 173-176 (2004). TLC of R,S-(+-)-ibuprofen and S-(+)-ibuprofen on silica gel prewashed with methanol - water 9:1 and impregnated with L-arginine by conventional dipping for 2 s in a 0.03 mol/L solution of the compound in methanol. One-dimensional development with acetonitrile - methanol - water 5:1:1 plus several drops of acetic acid to adjust the pH to 4.8, and two-dimensional chromatography with the same solvent mixture in two directions. Quantitation by densitometry at 210 nm.

J. Planar Chromatogr. 21, 349-353 (2008) TLC of S-(+)-ketoprofen on silica gel (prewashed by development with methanol - water 9:1 and impregnated by dipping for 2 s in a solution of L-arginine in methanol) at 22 +/- 2 °C with acetonitrile - water 5:1 acidified with several drops of glacial acetic acid (to maintain the pH <4.8) in one-dimensional and two-dimensional modes. Quantitative determination by absorbance measurement at 252 nm.

Chinese J. Chromatogr. 32 (3), 242-247 (2014). Definition of novel molecular connectivity indices and calculation of the indices for 18 chiral hydroxyl acids and amino acids, based on Kier’s molecular connectivity indices and conjugated matrix. Study of the quantitative structure-retention index relationship (QSRR) between the retention index of the chiral organic acids and the chiral connectivity indices by multivariate statistical regression. The best four-parameter QSRR model was set up through leaps-and-bounds regression analysis. The traditional correlation coefficient and the cross-validation correlation coefficient of leave-one-out were given, respectively. The results demonstrated that the model was highly reliable and had good predictive ability from the statistical point of view. From the parameters of the model, it is known that the dominant influence factors on the retention index were the two-dimensional molecular structure characteristics and the space factors such as the chiral characteristics, the flexibility and the puckered degree of the molecules of the chiral organic acids. The results also indicated that the introduced chiral connectivity indices had good rationality and validity for the characterization of the retention indices for the chiral organic acids, thus, provided an effective method for predicting the retention indices of chiral organic acids.

J. Chromatogr. 448, 345-354 (1988). Reversed-phase TLC of a variety of racemic compounds on octadecyl-bonded silica with mobile phases containing highly concentrated solutions of ß-cyclodextrin. Detection under UV 254 nm. Densitometry at the wavelength of maximum absorbance for each compound.