J. Planar Chromatogr. 17, 75-78 (2004). HPTLC of montelukast sodium (1-[[[(1R)-1-[3-[(1E)-2-(7-chloro-2-quinolinyl)ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyk)phenyl]-propyl]thio]methyl] cyclopropane acetic acid monosodium salt) and nimesulide (N-(4-nitro-2-phenoxyphenyl)methane sulfonamide or 4-nitro-2-phenoxymethanesulfonanilide) as internal standard on pre-washed silica gel with toluene - ethyl acetate - glacial acetic acid 60:34:1 in a twin-trough chamber. Quantitative determination at 344 nm.

with and without red heartwood. J. Planar Chromatogr. 17, 350-354 (2004). TLC of (+)-catechin and (-)-epicatechin on silica gel with diisopropyl ether - formic acid 9:1. Detection by spraying with vanillin-sulfuric acid reagent and heating at 120 °C for 5 min. Quantitative determination by absorbance measurement at 513 nm.

J. Planar Chromatogr. 17, 328-334 (2004). HPTLC of eighteen pesticides (propaquizafob, quizalofop-P, triadimefon, triadimenol, dimethomorf, quinoxyfen, cyromazine, oxyfluorfen, fluoroglycofen, acetochlor, metazachlor, imazapyr, furalaxyl, triclopyr, buprofezin, pyriproxyfen, fenoxycarb, piperonyl butoxide) on cyano phase. The greatest spread of separated compounds was obtained by combining nonaqueous normal-phase mobile phases (tetrahydrofuran or ethyl acetate in n-heptane 1:4 in the first direction and aqueous reversed phases mobile phases (methanol - water 7:3 or acetonitrile - water 1:1) in the second dimension. Detection under UV light at 254 or 366 nm. Videoscanning and densitometry at 254 nm.

Chinese J. Trad. Pat. Med. (Zhongchengyao) 26 (9), 716-719 (2004). TLC on silica gel with 1) ethyl acetate - chloroform - formic acid 3:2:1; 2) chloroform - methanol 7:2; 3) petroleum ether (60-90 ºC) - ethyl acetate 7:3. Detection 1) under UV 365 nm; 2) by spraying with 10 % H2SO4 in ethanol and heating at 105 ºC for 5 min; 3) by spraying with vanillin - H2SO4 solution. Identification by fingerprint technique. Quantification of icarrin by HPLC.

Chinese J. Hosp. Pharm. (Zhongguo Yiyuan yaoxue Zazhi) 25 (1), 90-92 (2005). TLC on silica gel with chloroform - ethyl acetate - formic acid 2:2:1. Detection under UV light. Identification by fingerprint technique. Quantification by densitometry at 325 nm. Validation of the method by investigation of linearity (0.52 µg - 4.68 µg, r = 0.9992); precision (RSD = 2.20 %, n = 5); reproducibility of five time assay towards the same sample (RSD = 3.10 %); standard addition recovery (99.0 %, RSD = 0.26 %, n = 5). The results for three real life samples are given.

J. Planar Chromatogr. 17, 305-308 (2004). TLC of manganese(II), chromium(III), nickel(II), cobalt(II), iron(III), and zinc(II) on cellulose with acetonitrile - hydrochloric acid - water 73:15:12 as optimum ternary mobile phase. Detection by spraying with 0.1 g quercetin in 100 mL 2-propanol and 10 g dimethylglyoxime in 100 mL ethanol and exposition to ammonia vapor. Recording of the colored spots under white light by means of a highly sensitive CCD color video camera.

J. Chromatogr. A 1026 (1-2), 301-304 (2004) A new and simplified method for extraction of ergosterol (ergosta-5,7,22-trien-3beta-ol) from fungi in soil and litter was developed using pre-soaking extraction and paraffin oil for recovery. Recoveries of ergosterol were in the range of 94-100 % depending on the solvent to oil ratio. Extraction efficiencies equal to heat-assisted extraction treatments were obtained with pre-soaking extraction. Ergosterol was detected by TLC. Detection by fluorescence measurement, quantification limit was 8 ng. Using visual evaluation of images of TLC plates photographed in UV-light the quantification limit was 16 ng.

J. Planar Chromatogr. 18, 419-422 (2005). TLC of fenitrothion on silica gel in a horizontal chamber with ethyl acetate - n-heptane 1:4. Quantitative determination by scanning with a diode-array spectrophotometer from 191 to 612 nm.