IV., Amobility of the acidic compounds bromoxynil and pentachlorophenol. Biochemie und Physiologie der Pflanzen 182, 323-332 (1987). Radiochemicals and plant methanol extracts incubated for 2 h were examined by TLC on silica with chloroform - ether - acetic acid 40:9:1 (for bromoxynil) and chloroform - cyclohexane - acetic acid 9:9:2 (for pentachlorophenol). Radioscanning.

J. Planar Chromatogr. 11, 90-93 (1998). Determination of the relationships between Rf values and mobile phase composition for eleven moderately polar pesticides in systems of the type silica + nonpolar or weakly polar diluent (heptane or chloroform) - polar modifier (ethyl acetate, tetrahydrofuran, dioxane, or acetone). TLC of atrazine, chlorfenvinphos, methoxychlor, carbaryl, alachlor, bromopropylate, captan, dinoseb, diuron, fenchlorphos, fenitrothion on silica gel with e.g. ethyl acetate - heptane. Detection under UV at 254 nm or 365 nm or by exposure to iodine vapor. Useful information for isolation of the pesticides tested.

J. Planar Chromatogr. 27, 398-402 (2014). HPTLC of (1) permethrin and (2) fenpropathrin in water samples on silica gel with petroleum ether (60-90 °C) - ethyl acetate - dichloromethane 192:5:3. Detection by spraying with 10 mL of phosphomolybdic acid solution (7%, w/v, in ethanol), followed by heating at 170 °C for 10 min. The hRF values of (1) and (2) were 52 and 34, respectively. Linearity was in the range of 8.7-30.6 ng/mL for (1) and 5.4-19.1 ng/mL for (2). The intermediate precision was below 2 % (n=5) . The LOD and LOQ were 0.44 and 1.47 ng/mL for (1) and 0.56 and 1.88 ng/mL for (2), respectively. Average recoveries for (1) and (2) were 92.5 and 95.6 %, respectively.

J. Chromatogr. 463, 139-145 (1989). Description of a new quantification method, laser pyrolysis, for TLC without the need of visualization process in detecting any organic compound. Use of 2 amino acids, 2 pesticides as test samples. Complete analysis time less than 20 min. Comparison of sensitivity and linearity with densitometry. This technique combines the advantage of the separation power of TLC and GC detection methods. Detection limits, 100 ng for phenylalanine with FID and 20 ng for methoxychlor with ECD.

A new high performance thin layer chromatography (HPTLC) method for the analysis of liver and crop samples in suspected poisoning cases. J. Liq. Chrom. & Rel. Technol. 22, 1547-1559 (1999). HPTLC of imidacloprid and primary metabolite 6-chloronicotinic acid on silica gel with chloroform - acetone - methanol 23:1:1 for imidacloprid determination and a mixture of acidified chloroform - dichloroethene - methanol 13:1:10 for imidacloprid and chloronicotinic acid determination with chamber saturation. Densitometry at 275 nm. Detection limit between 0.25 and 0.5 µg/g. New repeatable, reproducible and sensitive quantitative TLC procedure.

J. Planar Chromatogr. 29, 391-393 (2016). HPTLC of endosulfan from visceral tissue on silica gel with (1) hexane – acetone 4:1, (2) hexane – acetone 9:1, (3) acetone – benzene 4:1, (4) cyclohexane – chloroform 3:2 and (5) benzene – methanol 2:3. Detection by spraying with 5 % sodium hydroxide and then 2 % pyridine. The plate laid for 5 min and then was sprayed with p-aminoazobenzene reagent (0.25 % p-aminoazobenzene in ethanol, 25 %). The hRf values of endosulfan in the selected systems were 97 for (1) and (4), 78 for (2), 91 for (3) and 95 for (5).

Bull. Chinese Trad. Med (Zhongyao Tongbao) 13, 482-484 (1988). TLC of BHC and DDT on silica with hexane and hexane - chloroform 9:1. Quantification by densitometry at 254 nm. Detection limit 0.01 ˜ 0.1 µg.

J. Planar Chromatogr. 13, 314-316 (2000). TLC of DDT, methoxychlor, methylparathion, parathion, lindane, chlordane, diazinon, malathion, endosulfan and phorate on silica gel with n-heptane - acetone 4:1. Detection under UV 254 and 366 nm. Optimum conditions for simultaneous separation and identification of organochlorine and organophosphorus insecticides. Fast, simple, inexpensive, precise method.