J. Planar Chromatogr. 5, 465-467 (1992). TLC of 8 azaarenes on cellulose with DMF - water mixtures 65:35, 50:50, 35:65, 20:80, 10:90. After drying visualization under UV 254 nm and exposure to trifluoroacetic acid vapor followed by visualization under UV.

Merck KGaA (Ed.): Chromatographie - Chronologie einer Analysentechnik - Praxis, Status, Trends, GIT Verlag mbH, Darmstadt, 96-100, ISBN 3-928865-21-8 (1996). Correlation between instrumental thin-layer chromatography and GLP (Good Laboratory Practice). Each step in TLC, e.g. sample application, development, evaluation, pre- or post chromatographic derivatization, is fully automated. The advantages and possibilities of each automated step are discussed. Instrumental TLC shows good reproducibility and high flexibility. Documentation regarding GLP is demonstrated by reports. Automated validation of instruments is shown.

Indian Drugs 41 (8), 482-487 (2004). HPTLC on silica gel with toluene - acetone - ammonia 50:50:1. Quantitative determination by absorbance measurement at 315 nm. The method was validated in terms of linearity (300-1000 ng/spot), precision, accuracy, and specificity. For the content uniformity test the tizanidine hydrochloride content of 10 individual tablet units of two market formulations was determined after extracting with methanol. Both formulations compiled with the USP specification. The proposed content uniformity allows the parallel analysis of ten tablets on a single plate and provides a faster and cost-effective quality control tool for routine analysis. A simple, sensitive HPTLC content uniformity test was developed and validated for the analysis of tizanidine hydrochloride in its commercial single component tablet formulations (2 mg/tablet).

IPC 56th 2004, Abstract No. GP-8. Simultaneous HPTLC determination of ranitidine and domperidone on silica gel with methanol - 1, 4-dioxan 2:3. Quantitative determination by densitometric scanning at 282 nm. Rf values were 0.33 for ranitidine and 0.78 for domperidone. Linearity range was 0.5 – 2.5 mg/mL for both of the drugs. The recovery was in the range of 100.25 – 100.78 %. The method is suitable for the analysis of both drugs in combined dosage form.

J. Planar Chromatogr. 19, 252-254 (2006). TLC of 22 amino acids on silica gel with n-propanol - water 7:3. Detection by spraying with 0.25 % 2,3-dichloro-1,4-naphthoquinone in ethanol, followed by drying in the air at room temperature and heating in an oven at 110 °C for 10 min. After cooling spraying with 0.4 % isatin in ethanol. Visual detection of spot colors (varying from yellow, to orange, pink, purple, and gray). Detection limits were determined visually and ranged from 0.01 µg (cystine and arginine) to 0.30 µg (isoleucine, phenylalanine, methionine, aspartic acid, and glycine).

Indian Drugs 44(10), 751 (2007). TLC and HPTLC of methanolic extracts of Eclipta alba, Launaea nudicaulis and Tridax procumbens, on silica gel with toluene - ethyl acetate - methanol 14:5:1. Evaluation under 254 and 366 nm. Detection by spraying with anisaldehyde sulfuric acid followed by evaluation at 525 nm.

Anal. Chem. 79, 486-493 (2007). TLC of methylene blue and methyl red on monolithic phase with ethyl acetate - ethanol -water 6:4:3 and 3:2:1 with chamber saturation for 30 min. After development the plates were dried and scanned with MALDI. TLC separation of fluorescamine labeled proteins (insulin, cytochrome c, lysozyme, and myoglobin) with 40 or 55 % aqueous acetonitrile and 0.1 % trifluoro acetic acid with chamber saturation for 30 min. Detection under UV 366 nm. Preparation of the monolithic layer: The polymerization mixture consisted of butyl methacrylate, ethylene dimethacrylate, 1-decanol, cyclohexanol, and 2,2-dimethoxy-2-phenyl-acetophenone.

J. Planar Chromatogr. 23, 201-207 (2010). TLC and HPTLC of 17 5,5-disubstituted hydantoins on silica gel with ethyl acetate - toluene (with 30-60 % ethyl acetate) and acetonitrile - toluene (with 30-50 % acetonitrile) and on RP18 with methanol - water (with 56-80 % methanol) and acetonitrile - water (with 30-60 % acetonitrile) at room temperature without chamber saturation. Detection under UV 254 nm. The effect of the structures of the derivatives on their retention in both normal and reversed-phase modes was investigated by use of QSRR and molecular descriptors. Cross-validation indicated the best models are reliable QSRR models.