J. Chromatogr. 503, 293-357 (1990). Review with about 50 references on the analysis of chemical warfare agents, organophosphorus compounds, vesicant compounds, irritants, etc. by TLC.

Anal. Chem. 67, 315R-348R (1995). A review with 565 references on the analysis of coal, crude oil, shale oil, heavy oil, lubricants, natural gas, refined products and source rocks, including TLC applications in the area.

J. Chromatogr. A 1462, 134-145 (2016). Development of simple method for the separation of different colored pigment formulations used in the printing materials on food packaging to control the quality and safety of the package. HPTLC on silica gel by automated multiple development with a 9-step gradient based on ethyl acetate, methanol and water, and ending with toluene. Good resolution of differently soluble constituents of the pigment formulation like additives and coating materials. The results obtained by multi-detection allowed a first assignment of the differently detectable bands to particular chemical substance classes, enabled the comparison of different commercially available pigment batches and revealed substantial variations in the composition of the batches. Characterization of single unknown pigment constituents by HPTLC-MS and HPTLC combined with ATR-FTIR. The new HPTLC method for routine quality control for incoming pigment batches and monitoring of internal pigment production processes secures a consistent pigment composition, resulting in consistent ink quality. Hyphenation of HPTLC with the Aliivibrio fischeri bioassay revealed information on the toxicological potential of different pigment compounds which helps guarantee consumer safety, especially in regard to readily permeable pigment components.

J. Planar Chromatogr. 9, 363-367 (1996). Semipreparative TLC of coal liquefaction extracts on silica with pyridine (for 42 mm) and acetonitrile (for 77 mm) as mobile phases. Separation into (1) material immobile in both solvents; (2) material mobile in the first solvent but not in the second; and (3) material mobile in both solvents.

J. Chromatogr. A 1218 (19), 2793-2811 (2011). A review on the forensic examination of writing ink on documents. The focus in ink analysis is on screening questioned samples and on verifying their compounds in relation to control ink samples. Description of a project designed to develop improved standardization procedures to ensure the best possible reproducibility between analyses run on different HPTLC plates. HPTLC of ink samples (punched from written documents and extracted with tetrahydrofuran – water 4:1) on silica gel with n-butanol – ethanol – water 10:2:3 without chamber saturation. Detection by densitometric measurement of absorption intensities of each point of the elution track directly at 31 wavelengths between 200 and 700 nm.

J. Planar Chromatogr. 9, 146-148 (1996). HPTLC of methyl-, ethyl-, propyl-, and butylparaben on RP-18 with acetone - water without prior chamber saturation; detection under UV 254 nm. Quantification by densitometry at 254 nm (absorbance).

J. Chromatogr. Sci. 46 (4), 298-303 (2008). HPTLC of three surfactants, cetyltrimethylammonium bromide (CTAB), dodecyltrimethylammonium bromide (DTAB), and polyoxyethylene (20) sorbitan monolaurate (Tween 20), on silica gel with 5 % aqueous thiourea - acetone - methanol 3:1:1. Evaluation of the effect of the carbon chain length of alcohols (methanol, ethanol, n-propanol, and n-butanol) on the mobility of these surfactants. The comparative study was performed with sulfur- (thiourea) and oxygen- (urea) containing compounds in the eluent. Investigation of the interference on the resolution of the mixture of CTAB, DTAB, and Tween 20, due to presence of metal cations as impurities.

Analyst 112, 433-436 (1987). Description of a technique for the identification of compounds separated by HPTLC using fast atom bombardment mass spectrometry (FAB-MS) without any extraction procedure between the two analysis steps. Discussion of the advantages of smaller samples, shorter analysis time and less opportunities for contamination to occur than with conventional extraction methods. Identification of surfactants in mixed systems. Detection of amine antioxidants in gas oils at levels below 20 ng/µL.