Acta Chrom. 11, 62-74 (2001). TLC of basic isolates of Chelidonium majus L. (homochelidonine, allocryptopine, chelidonine, protopine, chelerythrine, san-guinarine and berberine) on silica gel with different mobile phases: toluene – ethyl acetate – methanol 17:2:1, toluene – ethyl acetate 4:1, toluene – ethyl acetate – methanol 11:8:1 and toluene – methanol 19:1; and on aluminum oxide 60 type E (basic) with toluene – ethyl acetate 9:1, 4:1, and 3:2; and toluene – methanol 19:1 in horizontal chamber. Evaluation under UV light at 254 and 366 nm, or by spraying with Dragendorff’s reagent. The HPLC-UV method was developed in parallel.

J. Planar Chromatogr. 19, 398-400 (2006). HPTLC of curcumin, piperine, and thymol on silica gel, pre-washed with methanol, without chamber saturation with toluene - ethyl acetate - methanol 18:2:1. Quantitative determination by absorbance measurement at 420 nm for curcumin, 333 nm for piperine, and 277 nm for thymol. Limit of detection for curcumin was 25 ng, for piperine 5 ng, and for thymol 50 ng. Rapid identification of the three compounds is also possible by spraying the plate with anisaldehyde in sulfuric acid reagent.

Simultaneous separation of mixtures of zinc, nickel, mercury and cadmium or manganese cations. Acta Chrom. 12, 177-188 (2002). The effect of surfactant concentrations below and above the critical micellar concentration on the retention behaviour of metal ions was examined. The effect of organic and inorganic additives on the mobility and separation efficiency of the metal ions was also assessed. TLC of mixtures of Zn2+, Ni2+, Hg2+, and Cd2+ or Mn2+ on silica gel with 50 mM aqueous micellar solution of N,N-cetyltrimethyl-ammonium bromide (CTAB). Detection of Ni2+ with a 1 % solution of alcoholic dimethylglyoxime, of Zn2+,Cd2+, and Hg2+ with a 0.5 % solution of dithizone in CCl4, and of Mn2+ with a 1:1 mixture of 2 M sodium hydroxide and 30 % H2O2. The proposed method was used for separation and identification of cations from drag-out nickel-plating solution and a sludge sample containing their hydroxides, as well as for semi-quantitative Ni2+-determination.

J. Liq. Chromatogr. & Relat. Technol. 30, 405-418 (2007). TLC of cholic acid, glycocholic acid, glycolithocholic acid, deoxycholic acid, chenodeoxycholic acid, glycodeoxycholic acid, and lithocholic acid on silica gel impregnated with 1 %, 2.5 %, and 5 % aqueous solutions of copper(II) sulfate, manganese sulfate, nickel sulfate, and iron(II) sulfate, using mixtures of n-hexane - ethyl acetate - acetic acid 22:20:5; 25:20:2; and 22:22:5. The use of the mobile phase 25:20:2 on silica gel impregnated with a 5 % solution of copper(II) sulfate allowed separation of all neighbouring pairs of investigated bile acids, compared to non impregnated plates. Detection of bile acids by spraying with 10 % aqueous sulfuric acid reagent, followed by heating at 120 °C for 10 min.

Pharmazie 61, 70-73 (2006). TLC of olean-12-en-3beta,11a,16beta-triol-3-O-palmitate, ursa-12-en-3beta,11beta,16beta-triol-3-O-palmitate, olean-12-en3beta,16beta-diol-3-O-palmitate, beta-amyrin, alpha-amyrin, methylursolate, taraxasterol, taraxast-20(30)-ene-3beta,16beta-diol-3-O-palmitate, pseudotaraxasterol, lup-3beta-O-palmitate on silica gel. Detection UV light or by spraying with 98 % sulfuric acid - ethanol 1:19 followed by heating at 110 °C.

J. Liq. Chromatogr. & Relat. Technol. 29, 2437-2449 (2006). TLC of thifensulfuron methyl, triasulfuron, chlorsulfuron, rimsulfuron, amidosulfuron, and tribenuron methyl on silica gel with benzene - methanol 9:1 in a chamber saturated for 30 min, and on RP phase with acetonitrile - methanol - 0.1% phosphoric acid 7:7:6. Detection by iodine vapor or by spraying with a solution of potassium dichromate (5 g) in sulfuric acid (40 %; 100 g), followed by heating to 150 °C.

J. Liq. Chromatogr. Relat. Technol. 28, 2361-2382 (2005). TLC of (-)-delta9-tetrahydrocannabinol, cannabinol, cannabidiol, cannabigerol, (-)-delta9-(trans)-tetrahydrocannabinolic acid A, cannabidioloc acid, and cannabigerolic acid as reference compounds on RP-18 with methanol - 5 % acetic acid 19:1; and on silica gel with chloroform - methanol 19:1. Evaluation under UV 254 nm. Detection by spraying with modified anisaldehyde - sulfuric acid reagent. For selective detection of cannabinoids, plates were sprayed with 0.5 % fast blue B salt in water, followed by spraying with 0.1 M sodium hydroxide solution.

Mitt. Mechanismus der Dilactam-Bildung. / Indole cleavage with mebhydroline by sodium periodate – Part 2. Mechanism of the dilactam formation (German). Pharmazie 61, 391-399 (2006). TLC of 5-benzyl-2,3,4,5-tetrahydro-2-dimethyl-1H-pyrido[4,3-b]indol-2-ium-bromid, 2,5-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indol and 15 other compounds on alumina with chloroform - ethanol- ammonia 13:6:1; and benzene - ethyl acetate 3:2. Also TLC on silica gel with chloroform - acetone - ethanol - ammonia 90:10:10:1, diisopropyl ether, and chloroform - ethyl acetate 7:3. Detection under UV light at 254 and 366 nm, Dragendorff reagent (and spraying with 10% sulfuric acid), and Ehrlich reagent.