J .Chromatogr. Sci., 29, 423-427 (1991). HPTLC of sulfonamide on silica developed three times with mixtures of methanol, containing 2% NH3 (25%) and dichloromethane 3:7, 14:85 and 5:95. Detection by fluorescence quenching, or by spraying with a fluorescamine solution, and scanning by fluorescence at 366/>400 nm. Detection limit 0.32 ng. Limit of quantification, 4 µg/kg for milk and meat samples.

Arzneim. Forsch/Drug Res. 48, 294-299 (1998). TLC of epoxyethanesulfonamides, ethynesulfonamide and reference compounds (N-phenylacylsulfonyl derivative, N-phenacyl derivatives, morpholine, N-methylpiperazine) on alumina with two solvent systems: methanol - water 4:1 during 10 min, followed by hexane - ethyl acetate 4:1 during 30 min. Visualization under UV 254 nm and with different reagents including 2,2-dihydroxy-1-H-indene-1,3(2H)-dione or ninhydrin, Dragendorff and potassium permanganate reagent. Semi quantitation via color variation acc. to concentration.

(Analysis of sulfonamides in tissues of slaughtered animals. Comparison of results from a microbiological test and from HPTLC-analysis after derivatization with fluorescamine.) Z. Lebensm. Unters. Forsch. 175, 392-398 (1982). Two-dimensional HPTLC of 11 sulfonamides on silica with 1) ethyl acetate - methanol - 25 % NH3 30:15:10 2) chloroform - CCl4 - methanol 90:10:5. Detection by spraying with fluorescamine solution.

J.A.O.A.C. 71, 855-856 (1988). TLC of indican and allantoin on cellulose with n-butanol - methanol - water 2:2:1. Spraying with p-dimethyl-aminocinnamaldehyde (23.5 mg/mL ethanol - HCl 1:3). Inspection under UV. Detection limits 125 ng for allantoin and 13 µg for indican.

J. Planar Chromatogr. 7, 202-210 (1994). TLC of twenty nine congeneric alkanolamines, mainly derivatives of ethanolamine and diethanolamine, on RP-18 with methanol - water 9:1 or acetonitrile - water 9:1. Comparison of the capacity factors with data, taken from the literature obtained by paper chromatography on cellulose, using three different mobile phase systems.

Biochemical Systematics and Ecology 28, 1019-1021, (2000). TLC of amide on silica gel with hexane - acetone 2:1. Detection with phosphomolybdic acid reagent.

E-Journal of Chemistry 6(1), 295-302 (2009). HPTLC of rofecoxib and tizanidine on silica gel (plates pre-washed with methanol and dried at 110 °C) with toluene - ethyl acetate - methanol - triethyl amine 60:30:5:1 with chamber saturation for 15 min. The hRf value of tizanidine was 49 and of rofecoxib 68. Rosiglitazone was used as internal standard. Densitometric evaluation at 235 nm. The method was linear in the range of 3.75-11.35 µg/band for rofecoxib and 0.30-0.70 µg/band for tizanidine. The recovery was 99.6-101.0 %.

J. AOAC Int. 93, 820-824 (2010). HPTLC of mexiletine hydrochloride on RP-18 with tetrahydrofuran - citrate buffer (pH 4.45) 3:7 and on amino phase with chloroform - tetrahydrofuran - hexane - ethylamine 30:20:50:1. Quantitative determination by absorbance measurement at 217 nm. Linearity was between 0.5 and 8.0 µg/spot. The accuracy was 99.6 % for the amino phase and 99.5 % for the RP-18 phase. The %RSD of intra-day and inter-day precision was 1.2 and 2.7 %, respectively; for both layers LOD and LOQ were 100 and 300 ng/zone, respectively.