J. AOAC Int. 91, 1203-1209 (2008). HPTLC of atrazine, clofentezine, chlorfenvinphos, hexaflumuron, terbuthylazine, lenacyl, neburon, bitertanol, and metamitron on silica gel with ethyl acetate - n-heptane 1:4, 3:7, 2:3, or 7:3 in a horizontal chamber. Detection by scanning in the range of 200 to 600 nm with a TLC-DAD scanner.

Anal. Chem. 55, 2120-2126 (1983). TLC of long-chain alkylbenzemes on silica impregnated with 15 % AgNO3 with hexane. Location by visualization a standard band by spraying with 2',7'-dichlorofluorescein in methanol. Subsequent analysis of the eluate by GC. Comparison of TLC/GC technique with GC/MS.

Anal. Chem. 67, 525R-582R (1995). A review with a number of references on the analysis of water, including the applications of planar chromatography in the field.

J. Agric. Food Chem. 50, 5626-5633 (2002). TLC of isoxaflutole, [14C]-isoxaflutole and diketonitril-isoxaflutole on silica gel with ethyl acetate - methanol - acetic acid 92:5:4:3.

(Separation, detection and determination of nitrotoluidines.) Forum Staedte-Hygiene 36, 1985. Two-dimensional TLC of nitrotoluidines on silica with 1) toluene - methanol 9:1 and 2) dibutyl ether - hexane - acetic acid - methanol 78:16:4:3. Detection by azo-coupling with 1 % N-(1-naphthyl)-ethylene-diammoniumdichloride or by UV 254 nm. Detection limit 100 -300 ng.

J. Chromatogr. Sci. 33, 670-685 (1995). Presentation of an assessment of the methods for handling environmental samples prior to CE for both aqueous and solid matrices. Discussion of TLC as a clean up technique, as well as a separation/detection tool, stressing on its versatility in environmental analysis.

CBS 88, 12-13 (2002). TLC of waste water samples or spinach extract on silica gel. Selective detection of bioactive compounds by dipping in suspension of luminescent microorganisms (Vibrio fischeri). Visual detection of substance zones by reduced luminescence.

J. Liq. Chromatogr. Relat. Technol. 31, 1925-1942 (2008). HPTLC of benzo[a]pyrene, benzo[b]fluoroanthene, benzo[k]fluoroanthene, benzo[ghi]perylene, fluoroanthene, 2-methylanthracene, and indeno[1,2,3-cd]pyrene on silica gel impregnated with caffeinesolution (by dipping in a solution of 2 g caffeine in 120 mL acetonitrile for 20 min, followed by drying for 15 min at 120 °C) with isopropyl acetate - acetonitrile 7:3 in a twin trough chamber at -20 °C. For fluorescence enhancement the plates were dipped in a solution of paraffin - n-hexane 1:1 and dried for 1 min in cold air. Quantitative determination by fluorescence measurement at 366/>400 nm. The method can be applied for control of the limit levels of the six polycyclic aromatoc hydrocarbons in water. The limits of quantitation were 0.08-0.44 ng/band depending on the substance. Linearity showed coefficients of correlation = 0.9920. The recoveries by stir bar sorptive extraction (n = 3) were between 87-100 % depending on the substance. The whole procedure was optimized to reach a sample throughput of 30 water samples, inclusive sample preparation by stir-bar sorptive extraction (SBSE), per 8-hour day.