J. Chin. Trad. Med. (Zhongguo Zhongyao Zazhi) 21, 161-164 (1996). A review with 33 references stressing at introduction of TLC procedures. Discussion of the sample preparation and some factors affecting the determination.

Anal. Biochem. 308 (1), 106-111 (2002). TLC of cyclic AMP (cAMP) on silica gel with water - ethanol - NH4HCO3 3:7:0.2 M. This procedure separated [32P]cAMP from other radioactive metabolites of [32P]ATP in up to 19 samples on one sheet (20×10 cm) over 40–60 min at room temperature (21 °C). This simple and rapid isolation method provides a novel and convenient technique for the assay of adenylyl cyclase.

Anal. Bioanal. Chem. 391, 2111-2118 (2008). Review of developments in planar electrochromatography in open (PEC) and closed (PPEC) systems regarding the progress in chamber construction for planar electrochromatography, separating system performance, equilibration of the PPEC process, separation time and selectivity, and the general advantages, disadvantages and prospects of this separation mode. PPEC of 4-cholesten-3-one, 4-androsten-17alpha-ol-3-one acetate, 17R-acetoxyprogesterone, androstenedione, 4-pregen-11R-ol-3,20-dione, benzanilide, o-nitroaniline, hydrocortisone alcohol, and benzamide on RP-18 with 55 % aqueous acetonitrile containing 5 mM acetate buffer (pH 4.7) at 9 kV and under a pressure of 63 atm.

J. Chromatogr. A 1217 (43), 6600-6609 (2010). A review on hyphenations of planar chromatography and its most important subcategory HPTLC. Examples from the field of natural product search, food, and lipid analysis point out the hyphenation with effect-directed analysis and mass spectrometry and illustrate the efficiency gain. Depending on the task at hand, hyphenations can readily be selected, for example with MS, bioassays etc. as required to reach the relevant information about the sample. At the same time, information is obtained for many samples in parallel. The flexibility and the unrivalled features through the planar format valuably assist separation scientists.

Planta Med. 75, 711-718 (2009). For many decades, planar chromatography has been used for the analysis of plants, in particular today in its most advanced form of HPTLC. The technique is e. g. used for the identification of medicinal plants and dietary supplements, and for the detection of adulteration and quantitative determination of marker substances. Reliable qualitative and quantitative results can be achieved based on suitable instrumentation and adequate methodological concepts. The manageability of the entire planar chromatographic process has improved. Integration of biological detection systems as well as hyphenation to mass spectroscopy has widened the applicability of planar chromatography as an important analytical technique. The introduction is followed by explanation of HPTLC, use of HPTLC in plant analysis, limitations, applications (identification, detection of adulteration and quantitation), and instrumentation (chromatogram development, documentation, detection and evaluation).

J. Ethnopharmacol. 138, 755-771 (2012). HPTLC studies of Harpagophytum procumbens such as the quantification of harpagoside were reviewed. HPTLC of harpagoside in the roots of Harpagophytum procumbens on silica gel with dichloromethane – methanol – acetic acid 79:20:1. Detection by dipping into anisaldehyde – methanol – acetic acid – sulphuric acid 1:170:20:10, followed by heating at 120 °C for 5 min. Quantitative determination by absorbance measurement at 285 nm. HPTLC provides comparable results with HPLC but is less time consuming.

Food Control 47, 381-391 (2015). Review (2009-2013) of the TLC methods for detecting mycotoxins in search of the efficacy of essential oils and their components against fungi and mycotoxin secretion.

Food Control. 68, 310-329 (2016). Review of the methodologies to determine the occurrence of aflatoxin M1 (AFM1) and the fate of AFM1 during processing of milk and dairy products, such as yoghurt and cheeses, since 1996 until today. The review describes the application of TLC and HPTLC in raw and pasteurized milk, feta cheese, yoghurt, white cheese, ice cream and butter.