J. Planar Chromatogr. 4, 63-68 (1991). TLC on silica with dichloromethane – methanol – water 60:35:5 for CTC and 59:35:6 for DMCTC; silica gel layer was previously sprayed with 10% ECTA solution adjusted to pH 8.0. The less important anhydro derivatives of CTC and DMCTC were better separated on silanized silica with methanol – acetonitrile – 0.5 m oxalic acid (pH 2.0) 1:1:6. Quantification by densitometry at 280 nm. Correlation with LC method r >0.9999; RSD for TLC for the assay of the main components <2%.

Chinese J. Pharm. Anal. (Yaowu Fenxi Zazhi) 14, 5 (1994). TLC on silica with chloroform - methanol - NH3 1:1:1. Detection by spraying with 0.5% ninhydrin. Identification by comparison with standards.

Chinese J. Chromatogr. (Sepu) 14, 211-214 (1996). Optimization method for TLC solvent systems with 6 penicillins as model samples. Demonstration with the optimized solvent system composed of chloroform - acetone - ethanol - formic acid 64:9:16:11, and 58:23:9:10.

J. AOAC Int. 81, 386-393 (1998). TLC of ceftazidime (I), cefuroxime sodium (II), and cefotaxime sodium (III) and degradation products on silica gel with methanol - 1 N acetic acid 1:3 for I and methanol - conc. ammonia 200:3; for II and III). Visualization under UV 254 nm. Quantitation by densitometry at 258, 272, and 262 nm. Precision = 0.8, 0.7, and 0.8% for I, II, and III, respectively. New simple, rapid, and selective procedure for quality control and routine analysis.

Proc. Intern. Symp. on Planar Separations, Planar Chromatography 2001, pp. 173-179. Bioautography of cefazolin on silica gel TLC and HPTLC plates (without development) by dipping the plates into bacteria suspension or on the plate. Visualization of the antimicrobial activity by use of MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide). The method was considered as suitable for determination of the viability (capable of living) of given test bacteria on the TLC plate.

J. Planar Chromatogr. 18, 415-418 (2005). TLC of macrolide antibiotics (roxithromycin, midecamycin, erythromycin, azithromycin, and erythromycin ethylsuccinate) on cellulose with aqueous ammonium sulfate solutions concentrated from 0.5 to 4.0 M. Detection by exposure to iodine vapor.

J. Liq. Chromatogr. Relat. Technol. 31, 1903-1912 (2008). TLC of cefacetril on silica gel with methanol - acetonitrile in a sandwich chamber. The developed TLC plates were dried, then immersed briefly in the microorganism solution, and incubated for 20 h at 37 °C. After incubation the plates were sprayed with 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide solution and left at room temperature for 30 min. White inhibition zones were observed against a purple background (Chrom Biodip Antibiotic Test kit). The described procedure is suitable for screening and semiquantitative determination of antibiotic residues in milk.

J. Planar Chromatogr. 24, 524-528 (2011). TLC of cefixime on silica gel with toluene - ethyl acetate - formic acid - water 5:29:11:5 with chamber saturation for 30 min at 25 +/- 2 °C. The hRf value was 54. Quantitative determination by densitometry in absorbance mode at 293 nm. Linearity was between 500 and 1500 ng. The repeatability (%RSD) was below 2 %. The limit of detection and the limit of quantification was 9 and 42 ng/zone, respectively. The recovery was between 98.9-100.3 %.