J. Planar Chromatogr. 33, 99-100 (2020). Review of the papers presented during the Eastern Analytical Symposium (EAS) meeting, held November 17-19, 2019 in Princeton, NJ, USA and organized by The International HPTLC Association. The five papers outlined 1) the use of HPTLC to analyze a complex sample via solvent combinations and the future development of an autorobotic system, 2) analysis of complex samples covering wide ranges of polarity (biofuels, petroleum, lipidomic analysis), 3) HPTLC use in combination with different techniques for environmental analysis, 4) progress in getting official organizations to include HPTLC methods for botanicals in their publications, 5) HPTLC in quality control of botanical supplements, 6) non-botanical applications dietary supplements analysis, 7) HPTLC identification and quantification of cannabinoids in cannabis samples, 8) challenges of validation and transfer of HPTLC methods across multiple laboratories, 9) HPTLC screening for undeclared ingredients and 10) ongoing programs of The International HPTLC Association.

J. Liq. Chromatogr. Relat. Technol. 41, 1052-1065 (2019). Review of the following topics for the period of November 1, 2016 to November 1, 2018: sample preparation for TLC pesticide analysis; lipophilicity and retention studies for the study of biological activity; new reagents for pesticide detection; HPTLC-effect directed analysis on the surface of the layer; TLC-Raman spectrometry for the analysis of thiabendazole, triazophos, and phosmet residues; TLC analysis of radiolabeled pesticides; methods for the separation, detection, and qualitative and quantitative determination of pesticide residues; determination of pesticides in commercial products and the use of TLC for pesticide degradation studies. The review highlighted the isolation, characterization, and determination of less hazardous and less toxic biopesticides from plants, bacteria, fungi, and soil as the most active application area of pesticide TLC today.

J. Liq. Chromatogr. Relat. Technol. 42, 122-127 (2019). Review of the application of TLC and HPTLC for the analysis of Licorice, the dried root and rhizome of Glycyrrhiza uralensis Fisch., Glycyrrhiza inflate Bat., or Glycyrrhiza glabra L. The authors described methods using HPLC combined with HPLC fingerprint for rapid identification of species as well as methodologies for the analysis of glabridin on silica gel and RP-18.

J. Liq. Chromatogr. Relat. Technol. 42, 238-248 (2019). Review of recent applications of TLC in medicinal chemistry, including the determination of lipophilicity of biologically active compounds and its influence as activity descriptors of absorption, distribution, metabolism, elimination and toxicity. Practical applications of TLC as a fast screening technique in different stages of monitoring processes were also described, including systems recently used for stability studies of selected drugs.

Phytochem. Anal. 19, 2-16 (2008). Recent developments in the phytochemical analysis of Panax ginseng are described, including different approaches such as the determination of the total saponin content and target compound and group-specific analysis using HPTLC-MS. In metabolite profiling, the paper describes the use of nuclear magnetic resonance spectroscopy and high-resolution mass spectrometry.

CBS Publishers & Distributors, New Delhi, India, (1996), 459 pages, ISBN 81-239-0439-8.1. The book consists of an introductory section of 74 pages about general TLC techniques with 30 figures and 54 literature references; the practical part with 197 protocols of the analysis of pharmaceutical formulations give analytical parameters such as sample and standard preparation, chromatographic conditions, densitometric parameters, etc. See detailed review on page 51 CBS 76.

Chromatographic Science Series, Vol. 98, CRC Press, Boca Raton, New York, 2007. XVI + 420 pp.; ISBN 978-0-8493-4369-8. The problem of analysis of enantiomers became acute with the realization that the enantiomers of a drug may have quite different biological activity. TLC for chiral separations is simpler and less expensive than HPLC and enables simultaneous analysis of several samples in a short time. Densitometry and videoscanning enable quantitative analysis with satisfactory accuracy, and - in certain cases - chiral plates can be regenerated. In 15 chapters 24 authors cover all important aspects of the separation and analysis of enantiomers by planar chromatography. In the first and second chapter an overview and general information on chirality is presented; the use of precoated plates, of noncommercial plates, of cellulose- and silica gel-based adsorbents is discussed in the chapters 3 to 5. Chapter 6 summarizes the use of mobile phases containing chiral selectors. Information on the molecular mechanisms and the separation of stable or transient diastereoisomers can be found in chapter 7 and 8, whereas the next chapter is devoted to especially difficult separations using 2D TLC. The next five chapters review applications of TLC in the analysis of enantiomers of important compounds. Extensive literature is cited by the authors.

A multidisciplinary approach. CRC Press Boca Raton, New York, London, Tokyo, (1996), ISBN 0-8493-2660-5. 12 chapters about TLC in bacteriology, plant sciences, parasitology, entomology, skin secretions in vertebrates, clinical chemistry, environmental analysis, food analysis, forensic toxicology, pharmaceutical analysis, veterinary toxicology. 275 pages, 31 tables, 33 figures.