J. Agric. Food Chem. 33, 1049-1055 (1985). Two-dimensional TLC of benfuracarb and 19 metabolites on silica with, e.g. benzene - ethyl acetate 19:1 and benzene - methanol 19:1; benzene - methanol 19:1 and dichloromethane - acetonitrile - ether 2:1:1. Detection by UV and quantification by radiochromatography.

Chinese J. Chem. Reag. (Huaxue Shiji) 10, 163-166 (1988). A review with 29 references concerning in situ fluorimetric methods for the determination of pesticides by TLC. Direct detection of some aromatic pesticides using their natural fluorescence induced by treatment with heat, acids, bases, or inorganic salts. Indirect detection of nonfluorescent pesticides by spraying fluorescence reagents, or by derivatization reactions with labeling reagents such as dansyl chloride.

Chromatogr. Sci. 55, 663-715 (1991). A review with 180 references on chromatographic methods for the detection and identification of pesticide residues in food and feed. TLC methods are emphasized.

J. Planar Chromatogr. 7, 415-418 (1994). TLC on silica with acetone - hexane 1:4 or mixtures of butanol, acetic acid, water (upper layer). Detection by spraying first with diazotized PNA (p-nitroaniline, 0.05% solution in 1:4 hydrochloric acid) and then with sodium hydroxide solution; carbaryl was sprayed with diazotized I-acid (6-amino-1-naphthol-3-sulfonic acid), and then with sodium hydroxide. Quantification after elution, by spectrophotometry at 610 and 540 nm. This method is rapid, sensitive, highly reproducible, and free from interferences from various other pesticides.

Part 3: Solid phase extraction and affecting factors. Acta hydrochim. hydrobiolog. 22, 216-223 (1994). The German standard, DIN 38407, part 11, is based on sample preparation with solid phase extraction, AMD for separation of pesticides and densitometric detection. Factors influencing the solid phase extraction, like the ratio amount of sorbent and sample volume, the flow rate, the company or batch dependence, respectively, or the concentration of the eluate, are discussed.

J. Chromatogr. A 819, 35-44, (1998). Presentation of an on-line system consisting of a microbore HPLC syringe pump and a modified TLC autosampler controlled by new software for a personal computer running under MS Windows, which enables to spray the effluent from the HPLC column in fractions onto the plate in a freely definable manner to carry out both complete profiling analysis or typical target compound analysis. Demonstration of typical application to pesticide residue analysis in foodstuffs or environmental samples.

JAOAC Int. 84, 1219-1231 (2001). Compilation of the role of planar chromatography (PC) in medicinal and aromatic plant (MAP) research and development, and demonstration of the importance of the technique, after extraction, in the analysis of MAP (identification and quantitative determination of the separated compound/s), in the purification and isolation process, and in different types of screening procedure. Special attention is paid to analytical, micropreparative and preparative forced-flow techniques, for example OPLC and rotation planar chromatography (RPC). Purification and isolation procedures are shown in flowcharts. Some applications, relating to different classes of substance, are presented to demonstrate the versatility of various planar chromatographic techniques.

J. Planar Chromatogr. 18, 349-357 (2005). HPTLC of pesticides (prochloraz, chloroxuron, chlorotoluron, metoxuron, chlorbromuron, cyanazine, flamprop-M-isopropyl, prometryn, permethrin, bitertanol, hexazinone, chlorsulfuron, methabenzthiazuron, phenmedipham, metiocarb, dichlofluanid, propachlor, procymidone, terbuthylazine, propyzamide, tri-allate, bifenthrin) on silica gel, RP-18 W, RP-18, and cyano phases in a horizontal chamber. In adsorbent-gradient TLC silica gel plates were used in the first direction with tetrahydrofuran - n-heptane 1:4. After drying, the plates were cut in narrow strips and connected with RP-18 W or cyano plates, the pesticides were transferred to the before mentioned plates with methanol and developed in the second dimension with water - methanol or water - dioxane. Detection under UV light at 254 or 366 nm. Quantitative determination by densitometry at 254 nm.