J. Chromatogr. A 1459, 145-151 (2016). Presentation of a novel method for coupling TLC with ion mobility spectrometry (IMS) using laser desorption technique (LD). Sampling of the compounds (explosives like trinitrotoluene, 1,3,5-trinitro-1,3,5-triazacyclohexane, pentaerythritol tetranitrate, 2,4-dinitrotoluene and 3,4-dinitrotoluene; amino acids like alanine, proline and isoleucine, nicotine and diphenylamine mixtures) on the layer surface within less than 80 s after TLC separation by using the LD-IMS technique without the need of any further manipulation or preparation. The TLC plate was moved in desired directions by the motorized micro-positioning stage towards the right position of the fixed laser. TLC-LD-IMS offers an additional separation dimension, allowing separation of overlapping TLC analytes, and reveals possibility for fast and effective analysis of the mixtures due to the scan rate for LD being adjustable.

J. Chromatogr. A 1509, 147-152 (2017). Presentation of proper sigmoidal dose-response curves which can be linearized by the logit function resulting in logit-log plots in semi-log plots, from a planar yeast estrogen screen (pYES) as known for the evaluation of enzyme-linked immunosorbent assays and radioimmunoassays in microtiter plates. It was assumed to obtain sigmoidal shaped dose-response curves from the measured sign plots because pYES represents the transfer of the receptor assay YES to HPTLC. As no typical sigmoidal curves were obtained when peak areas were plotted against the applied amount on a logarithmic scale, peak heights were examined in the present study, which revealed proper dose-response curves when plotted against the log amount. The presence of sigmoidal dose-response curves from HPTLC-pYES made it possible to transform the signals into logits and, therefore, to create logit-log plots with linear correlations. The working range was up to 500 pg/zone for both 17β-estradiol (1) and 17α-ethinylestradiol (2). The mean recovery by applying logit-log plots for (1) and (2) from spiked water samples (2-20 ng/L) were 90 % and 108 %, respectively, with %RSD≤24 %. Determination of the half maximal effect dose (ED50) of the estrogen active compounds, which was represented by the intersection of the linear graph with the abscissa and also determination of the estrogenic potential in terms of estradiol equivalent factors by using the ED50 values, resulting in 0.64 for (2).

Anal. Chim. Acta 159, 359-363 (1984). TLC of pyrene on silica with ether - 3-methylpentane 4:3. Detection by site-selection spectroscopy with excitation at 363.8 nm.

Anal. Chem. 59, 415-418 (1987). Description of a simple and convenient procedure for characterizing thin-layer chromatographically separated fractions. It is based upon the transfer of. material from the TLC plate to a KCl pellet, followed by examination by diffuse reflectance Fourier transform IR spectrometry. Example is the TLC separation of polypropylene additives (Irganox 1330, Irganox 1010, Topanol OC and erucamide on silica using toluene - ethyl acetate 98.5:1.5 as eluent.

Direct TLC/MS using new sintered TLC plate) (Japanese). Jap. Mass Spectoscopy 34, 181-187 (1986) (Shitsuryo Bunseki). Description of a TLC/MS system for separation and measurement of mass spectra of nonvolatile and thermally unstable mixtures. Use of a TLC glass plate having many linear grooves engraved on the rear which guide a cutter to cleave into strip to be set on a usual holder for mass spectrometer.

Bull. Chinese Med. 12, 742-744 (1987) (Zhongyao Tonbao). TLC on silica with petrol ether - ethyl acetate 8:2. Detection by UV. Quantification by UV spectrometry at 301 nm and 310 nm, resp. after elution with ethanol.

Anal. Chem., 61, 615-618 (1989). Use of diffuse reflectance FTIR for in situ quantitative analysis of photochemical labile compounds separated by reversed-phase HPTLC. Small TLC plates were placed directly into the spectrometer’s reflectance accessory. Results were achieved in less than 2 min. Precision of overall technique was 3% in R.S.D.; detection limit, 400 ng for a diazonaphtoquinone ester.

J. Chromatogr. 479, 459-463 (1989). TLC of moclobemide and its decomposition products on silica with chloroform - methanol - water 13:6:1 or ethyl acetate - ethanol - 28% NH3 8:2:1. Detection under UV 254 nm. Photodegradation of moclobemide on silica. Identification of the products by spectrometry after scraping, extracting with methanol, separating by HPLC and collecting the eluents.