J. Planar Chromatogr. 2, 65-70 (1989). For qualitative analysis monodansyl cadaverine (MDC) was employed without further purification. Column-chromatographic purification is recommended for the quantification of short chain carboxylic acids. For in situ derivatization the carboxylic acid sample solutions were applied to the HPTLC plates as bands with a maximum length of 10 mm. These were then „overlayed“ with MDC solution containing N,N’-dicyclohexylcarbodiimide to activate the acids. Short-chain carboxylic acids were separated on normal silicagel phases with toluene - ethyl acetate - ammonia mixtures as mobile phase. Stepwise and gradient developments allow the baseline separation. Long-chain carboxylic acids are better separated on RP-18 phases with acetonitrile-tetrahydrofuran mixtures and methanol as mobile phase.

J. Planar Chromatogr. 4, 360-364 (1991). Description of a multidimensional approach to the coupling of HPTLC with capillary GC for the separation of the components of Matricaria chamomila. Multiple development on silica gel plates using solvents of different polarity and selectivity enables the separation of the components into various chromatographic zones, differing in the polarity of their constituents.

Chinese J. Pharm. Anal. (Yaowu Fenxi Zazhi) 16, 154-157 (1996). TLC on silica with a) petrol ether - hexane - ethyl acetate - ethanol 2:8:5:2, b) petrol ether (60 - 90 °) - hexane - ethyl acetate - ethanol - NH3 2:4:10:10:1. Detection by spraying with potassium iodobismuthate reagent. Quantification by HPLC after elution.

II. Calibration methods concerning quantitative hydrocarbon-group type analysis. J. Chromatogr. Sci. 36, 487-494 (1998). Use of TLC-FID for the hydrocarbon group type analysis of fossil fuels using internal normalization method. Investigation of repeatability, linear intervals and sample load ranges for quantitation towards different products covering a broad range of boiling points and chemical fractionalities in the field of fossil fuels. Comparison of the results with those obtained using external standard calibration. Validation of the method with TLC-UV scanning.

Chinese J. Pharm. Anal. (Yaowu Fenxi Zazhi) 22 (1), 47-50 (2002). TLC on silica gel with 1) toluene - ethyl acetate - formic acid 5:4:1, 2) petroleum ether (30-60°C) - ethyl acetate 50:1. Detection 1) by spraying with NH3 - AgNO3 reagent, 2) under UV 254 nm. Identification by finger print technique.

J. Chinese Trad. Patent Med. (Zhongchengyao) 10, 858-860 (2004). TLC on silica gel with 1) chloroform - methanol - water 13:7:2, 2) isopropanol - ethyl acetate - water 17:9:9, n-butanol - formic acid - water 15:3:2. Detection 1) by spraying with 10 % H2SO4 in ethanol and heating at 110 ºC, 2) by spraying with 0.3 % ninhydrin in n-butanol, 3) by spraying with 10 % vanillin solution. Identification by fingerprint techniques. Quantitative determination of ginsenoside by HPLC.

J. of Chromatogr. Sci. 49, 560-567 (2011). Evaluation of the fingerprinting efficiency of a novel two-dimensional analytical system composed of RP-TLC and RP-LC-MS. The efficiency of the system was compared with that of the one-dimensional system RP-TLC with MS detection. The test samples were phenolic acid extracts from Salvia lavandulifolia. Both systems can be applied to the fingerprint analysis of herbal extracts, but the two-dimensional system based on RP-TLC and RP-LC-MS can provide more abundant information.

Lipids 17, 515-518 (1982). TLC of acidic lipids on silica after column chromatography with chloroform - methanol - 0.25 % KCl 60:35:8. Detection with bromothymol blue. Zones scraped off. Elution of the indicator with chloroform - methanol 8:2 and of cholesterol glucuronide and ganglioside with chloroform - methanol 5:5.