Chem. (FENXI HUAXUE) 12, 455-458 (1984). (Chinese). (Studies on micellar solution as mobile phase in liquid chromatography. I. Use in thin-layer chromatographic separation of drugs). TLC of 33 drugs including sulfanilamides, vitamin B, antipyretics and adrenalines on polyamide with micellar aqueous solutions (SDS). Detection by various staining reagents and by UV.

GIT Fachz. Lab. 12, 1221-1223 (1986). Neue wasserbenetzbare HPTLC RP-18 Fertigplatten. New HPTLC RP-18 pre-coated plates wettable by water.) Description of a new HPTLC precoated plate based on silica gel with a reduced degree of modification with octadecyl groups. This plate material is fully wettable with methanol - water mixtures between 0:100 and 100:0. Running times for 50 mm are between 14 and 40 minutes, whereby the maximum running times occur with the 50:50 mixture. Separations of nicotinic acid - isonicotinic acid, of analgesics and of alkaloids.

J. Chromatogr. 391, 343-345 (1987). TLC of N-carbamyl-D, L-tryptophan on silica containing a chiral stationary phase, 2S, 4R, 2'RS-4-hydroxy-1- (2-hydroxydodecyl) proline, and copper(II) with water - methanol system at reduced temperature. Detection by spraying with Ehrlich's reagent and heating at 105 °C for 5 min Sensitivity, 100 mg/mL.

J. Planar Chromatogr. 2, 383-386 (1989). TLC separation of dyes and plant pigments on different modified silica stationary phases (cyclic diols, cyanopropyl, carboxylic ester) with toluene, isooctane - methanol - diethylether 7:1:2 as mobile phase and three methods of development - traditional vertical tank, experimental horizontal sandwich apparatus and an experimental over-pressure device. - The variation of the stationary phase can be used to gain selectivity advantages in chromatographic separations.

Chem. Anal. (N.Y.) 108, 15-47 (1990). A review with 8 references on the use of surface-modified reversed phase sorbents for HPTLC. Discussion of the surface reactions. Application in the separation of cholesterol and its bile acid metabolites and a mixture of steroids.

J. Planar Chromatogr. 3, 280-282 (1990). TLC of Re, Mo, V, W on Polichrom A (a copolymer of mixed 1,4- and 1,5-di(methacryloyloxymethyl)naphthalene and styrene with starch, dextrin of a polyvinyl alcohol containing 10-14% acetate groups as binder), with 0.5 hydrochloric acid - ethanol 9:1 as mobile phase. Detection by spraying first with a saturated solution of tin chloride in conc. HCl and second with a saturated aqueous solution of ammonium rhodanide.

J. Planar Chromatogr. 6, 34-37 (1993). Use of chitin and derivatives prepared by treatment of chitin with transition metals for the separation of optical isomers of amino acids: good separation on chitin-Cu with binary or ternary mixtures of organic solvents. The dependence of hRf values on the composition of the mobile phases has been demonstrated.

J. Chromatogr. 685, 360-364 (1994). TLC of amino acid racemates on the title plates with 1) 2-propanol - water 7:3, 2) phenol - water 4:1, 3) butanol - acetic acid - water 3:1:1. Detection by spraying with 0.1% ethanolic ninhydrin solution and heating for 5 minutes at 90 °C. Discussion of the enantiomeric separation mechanism.