Chromatographia 21, 687-692 (1986). Comparison of results from commercial precoated TLC plates and home-made bonded phases for TLC examined by 29 Si and 13 C. NMR of solid samples reveal differences in the degree of silylation obtained with different silanes and under different reaction conditions. NMR spectra can also be used to explain the cause of the wettability problems encountered with certain types of precoated TLC plates. Chemically bonded phases, 29 Si and 13C NMR.

Chem. J. of Chinese Univ. 34 (6), 1347-1352 (2013). TLC is widely applied as an analytical technique due to its distinguishing features like its intuitiveness, high performance, inexpensiveness, etc., however, gives insufficient qualitative information of the separated ingredients. On the contrary, FTIR is a strong technique in functional identification and qualitative analysis towards pure compounds rather than mixtures. TLC-FTIR combines the merits of both techniques and realizes in situ detection of the interested analytes. In the search for a stationary phase suitable for TLC-FTIR the processing procedure for barium fluoride particles was improved. The particle size was minimized to enhance separation performance and to attenuate the spectrum baseline elevation caused by the effect of light scattering. Preparation of barium fluoride particles by reaction of 100 mL of a 0.6 mol/L barium chloride solution and 150 mL of a 0.95 mol/L sodium fluoride solution. The resulting sediment was filtered, washed, and burned in a Muffle furnace at 600 °C for 3 hours, which produced particles with a size of approx. 100 nm. The TLC plates were coated by precipitation/evaporation method: 5 g barium fluoride powder and 50 mL distilled water were mixed to a suspension, which was poured into a vessel containing the basal gold-plated glass sheet placed horizontally. After complete evaporation of the liquid a barium fluoride TLC plate was obtained with a smooth, even and mechanically strong surface. Demonstration by TLC of rhodamine B and malachite green on the new barium fluoride plate with methanol – acetone 3:10 with chamber saturation for 30 min. In situ identification of the separated zones by microscopic reflection FTIR. The results indicated that TLC-FTIR based on barium fluoride plates has wide application prospect.

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.