J. Planar Chromatogr. 26, 165-171 (2013). OPLC of essential and non essential amino acids in proteins like hen egg yolk protein, bovine serum albumin (BSA), and Type I Collagen from bovine achilles tendon on silica gel with n-butanol - glacial acetic acid - water 40:3:12 and 50 bar external pressure, 300 µL rapid eluent flush, 100 µL/min eluent flow rate, 3200 µL development volume and 1950 s developing time. Detection by spraying first with 4-hydroxybenzaldehyde (1 % in acetone) and secondly, with ninhydrin (0.25 % in acetone), followed by heating at 110 °C for 10 min. Qualitative determination by absorbance measurement at 460 nm.

J. Planar Chromatogr. 31, 7-12 (2018). HPTLC of L-histidine (1), L-glycine (2), L-alanine (3) an L-phenylalanine (4) in Steatoda grossa spider web on silica gel with 2-butanol – acetone – glacial acetic acid – water 7:7:2:4. Detection by spraying with 0.5 % solution of ninhydrin in methanol, followed by heating at 100–110 °C for 10 min. Quantitative determination by absorbance measurement at 500 nm. The hRF values for (1) to (4) were 11, 35, 48 and 72, respectively. Linearity was between 0.2 and 1.0 μg/zone for (1) and (2), 0.1 and 0.5 μg/zone for (3) and 0.3 and 1.5 μg/zone for (4). LOD and LOQ were 185 and 556 ng/zone for (1), 154 and 461 ng/zone for (2), 100 and 302 ng/zone for (3) and 152 and 456 ng/zone for (4).

J. Liquid Chromatogr. 9, 1919-1931 (1986). TLC of 21 amino acids on different sorbents impregnated with paraffin oil with water as eluent. Comparison of retention behaviour of different supports - determination of lipophilicity of amino acids by RP TLC using silica gel, alumina, cellulose, Kieselguhr and their mixtures.

(L-lysine, L-histidine, L-arginine, glycine, L-threonine, L-tryptophan, L-methionine, L-valine, L-phenylalanine, L-isoleucine and L-leucine.

Quantitative determination of TLC-separated enantiomers. GIT Suppl. Chromatographie 3, 27-32 (1987). By means of nine examples (D-Phe, tert.-leu, 5, 5-dimethyl-thiazolidine-4-carboxylic acid, O-Bzl-Ser, L-4-iodophenylalanine, L-he, L-tyr, L-methyldopa, D-leu-L-leu) is demonstrated, that the quantitative determination of TLC-separated antipodes is a useful method for daily routine process in any laboratory. The resolution of the enantiomers is excellent, the respective antipodes could be evaluated at trace levels, the limit of determination is found to be at or above 0.1 %. In comparison to the "classical methods" GC and HPLC, TLC offers separation in parallel runs.

(Chinese). Chinese J. Adv.in Biochem.& Biophys. 2, 37-40 (1987) (Shengwu Huaxue Yu Shengwu Wuli Jinzhan). TLC of 6 amino acids on polyamide with a) benzene - acetic acid 9:1, b) 1.3% aqueous formic acid, c) ethyl acetate - methanol - acetic acid 20:1:1. Detection by dansylation. Quantification by fluorometry.

Anal. Letters 21, 1075-1084 (1988). TLC on silica impregnated with metal salts with a) chloroform - butyl acetate 10:5 and b) chloroform - ethyl acetate 25:2. Detection by exposing to iodine vapor. Determination of the partition coefficients and the correlation with Rf values.

Inhibition of penicillopepsin by pepstativ-derived peptides containing different statine side-chain derivatives. J. of Medicinal Chemistry 32, 1571-1576 (1989). TLC of histidine analogues on silica with 5% and 10% methanol in dichloromethane and chloroform - methanol - acetic acid 85:15:3. Visualization under UV and by spraying with ninhydrin and 5% phosphomolybdic acid in ethanol.