J. Planar Chromatogr. 20, 217-219 (2007). TLC of dichlorvos and diptrex on silica gel with hexane - acetone 4:1. Detection by spraying with a reagent prepared from strong alkali, for example 10 % sodium hydroxide, and 0.5% aqueous sodium sulfide solution. The sensitivity is approx. 20 µg for both dichlorvos and diptrex.

J. Pharm. Biomed Anal. 46(2), 391-394 (2008). HPTLC of conessine silica gel aluminum plates with toluene - ethyl acetate - diethyl amine 13:5:2 in a twin trough chamber saturated with mobile phase at 25 °C. Detection by spraying with modified Dragendorff's reagent. Quantification by densitometry in absorbance mode at 520 nm. Linearity was between 1 and 10 µg/zone (r2 = 0.9998).

Whole Plant Powder by HPTLC. Chromatographia 65 (11-12), 767-769 (2007). HPTLC of rutin in the whole plant powder of Amaranthus spinosus Linn. on silica gel with ethyl acetate - formic acid - methanol - distilled water 100:9:11:17. Quantification by densitometry at 363 nm. Linearity was between 10 and 60 µg/mL for rutin. The concentration of rutin in the whole plant powder was found to be 0.15 %.

J. Planar Chromatogr. 21, 205-208 (2008). TLC of phenol and its methyl derivatives on RP-2, RP-8, RP-18, cyano phase, and DIOL phase with methanol - water, ethanol - water, n-propanol - water, acetonitrile - water, and acetone - water in different volume proportions (100:0, 95:5, 90:10, 85:15, 80:20, 75:25, 70:30, and 65:35), 0.1 M acetic acid and 0.1 M sodium acetate in 30 % methanol (pH 5.0), 0.1 M potassium dihydrogen phosphate in 30 % methanol (pH 7.0), and 1 M ammonia in 30 % methanol (pH 11.3) in a saturated chamber. Best results were achieved on RP-2 with 0.1 M acetic acid and 0.1 M sodium acetate in 30 % methanol, 0.1 M potassium dihydrogen phosphate in 30 % methanol, and 1 M ammonia in 30 % methanol. Detection by spraying with 2 % methanolic iron(III) chloride solution or with a solution of titanium tetrachloride in concentrated hydrochloric acid (20 %) followed by heating at 120 °C for 30 s or 2 min.

J. Chromatogr. A 1188 (2), 295-300 (2008). Determination of food dyes (tartrazine, azorubine and sunset yellow) in different products by HPTLC combined with image processing of scanned chromatograms, on 3-aminopropyl modified silica gel with isopropanol - diethyl ether - ammonia 2:2:1. Quantification by using digital processing of images with special-purpose software. The limit of detection was between 5 and 9 ng/spot and the limit of quantification was between 10 and 18 ng/spot. Recovery was between 96.4 and 102.7 %.

Phytochem. Anal. 19, 244-250 (2007). HPTLC of taraxerol in Clitoria ternatea on silica gel with hexane - ethyl acetate 4:1. Detection by spraying with anisaldehyde reagent. Quantitative determination by absorbance measurement at 420 nm. The hRf value of taraxerol was 53 and selectivity regarding the matrix was given. Linearity was between 100 and 1200 ng of taraxerol. Recovery values were between 99.6 and 99.7 %. The limit of detection and quantification for taraxerol was 31 and 105 ng/spot, respectively.

J. Planar Chromatogr. 21, 143-149 (2008). RPTLC method for parallel estimation of the lipophilicity of chemically diverse neutral compounds or weak acids and bases. TLC of 28 drugs on RP-18 prewashed with methanol and heated at 160 °C for 1 h, with mixtures of water with methanol, ethanol, 1-propanol, acetone, acetonitrile, and 1,4-dioxane in a saturated chamber. Acetone - water 9:11 and 3:2 were best suited. Densitometric evaluation at 200 and 254 nm.

J. Liq. Chromatogr. Relat. Technol. 30, 2717-2727 (2007). Identification of lipid classes, e. g. fatty acid methyl esters, and polar lipids (presumably phospholipids), free fatty acids, sterols, triacylglycerols, fatty acid esters, by TLC on silica gel with n-hexane - acetone 25:4. Detection by spraying with 50 % ethanolic sulfuric acid and heating at 200 °C. The mushrooms contained a characteristic group of three isomeric hexadecenoic fatty acids (double bond in positions 6-, 9-, and 11-) which are resolved and determined separately for the first time.