Acta Agronomica 32, 313-330 (1983). For detecting the endogenous, free formaldehyde, maize plants were taken together with the roots, washed and placed into an aq. solution of 0.4 % dimedone. TLC of formaldehyde-dimedone, glycerine-aldehyde-dimedone on silica with benzene - methanol 99.5:0.5. Detection by UV 254 nm.

Jap. J. Hosp. Med. 13, 195-198 (1987) (Byoin Yakugaku). TLC on 3-amino propyltriethoxy silane-treated silica with benzene - methanol 25:1. Quantification by fluorescence - and visible spectrophotometry. Detection limit, 0.4 ng.

J. Planar Chromatogr. 5, 376-382 (1992). Description of methods for the efficient separation of the 2,4-dinitrophenylhydrazones of eight saturated aldehydes and five saturated ketones by thin-layer and overpressured layer chromatography in normal and reverse phase systems. The migration distances, retardation factors, and selectivity factors measured by overpressured layer chromatography were in most cases greater in overpressured layer chromatography than those measured by thin-layer chromatography. In reverse phase systems there was a stronger linear relationship between RM value and carbon number than in normal phase systems.

J. Agric. Food Chem. 51, 3824-3828 (2003). TLC of antifungal compounds, e.g. quinones (naphthoquinones, anthraquinones, benzoquinones) and commercial fungicide standards: Detection by bioautography: spraying with either of 3 spore suspensions (of Colletotrichum species), inoculation in a moisture chamber and incubation in a growth chamber at 24°C.

J. Planar Chromatogr. 28, 426-435 (2015). HPTLC of methyl 4-hydroxybenzoate, ethyl 4-hydroxybenzoate, propyl 4-hydroxybenzoate and butyl 4-hydroxybenzoate on silica gel with petroleum ether - acetic acid 20:3. Quantitative determination by absorbance measurement at 254 nm. The influence of experimental settings on densitometric evaluation using the TLC Scanner 4 was investigated to assess the impact on signal intensities, peak shape/resolution and quantitative results. Peak positions can shift for up to 0.5 mm for fast scan speeds. For improved quantitative results the scan slit length should be set to 75 % of the band length, the scan speed to 5 or 10 mm/s and data resolution to 25 or 50 μm/step. The resolution mode of the optical system provided higher signal intensities compared to the light mode. Peak broadening was observed for higher scan speeds, whereby the signal height decreased significantly, if compared to the peak area evaluations. The effects of the instrumental settings on the signal intensity were less pronounced for the evaluations via peak area. Hence, peak area evaluations were more robust with regard to the changed settings.

Proceedings of Sino/West German Symposium on Chromatography, Science Press, Beijing China, 602-617 (1983). TLC of 2,4-DNPH derivatives of 12 aldehydes and ketones on silica with a) tetrachloromethane - hexane - ethyl acetate 10:2:1, b) hexane - ethyl acetate - ethanol 87:12:1 and two-dimensional TLC of 2,4-DNPH derivatives on silica with different solvent systems.

Acta Alimentaria 17, 283-289 (1988). TLC of 2,4-DNPH-one derivatives of aliphatic monocarbonyls on silica or aluminium oxide with benzene - hexane 1:1 and chloroform - cyclohexane - ethyl acetate 10:2:1. TLC of 2,4-DNPH-one derivatives of aromatic monocarbonyls on silica with petrol ether (60-80°C) - benzene - ethyl acetate 2:1:1, TLC of 2,4-DNPH-one derivatives of other carbonyls on silica with toluene - ethyl acetate 3:1 or 1:1. Visualization by spraying with 5% ethanolic solution of KOH.

Chinese J. Hosp. Pharm. (Zhongguo Yiyuan Yaoxue Zazhi) 12, 202-203 (1992). TLC of hydroquinone diacetate on silica with toluene - ether 4:1. Quantification by densitometry at 375 nm.