J. Liquid Chromatogr. 5, 1531-1540 (1982). TLC of D-penicillamine on cation exchange plates (Fixion 50x8) with citrate buffer pH 4.4. Detection with ninhydrin.

J.A.O.A.C. 66, 85-91(1983). TLC of patulin, citrinin, aflatoxins B1, B2, G1, G2 on silica and on silica impregnated with 10 % oxalic acid in methanol for citrinin with 24 different developing solvents. Detection with MBTH (0.5g 3-methyl-2-benzothiazolinone hydrazone in 100 ml water and heating at 130 °C for 15 minutes; UV 366 nm. For patulin: 90 % formic acid and UV 366 nm; for aflatoxins: UV 366 nm; for citrinin: AlCl3 solution and by UV 254 and 366 nm. Detection limits: 120-130 mg/kg patulin; 30-40 mg/kg citrinin; 2-2.8 mg/kg B1/G1; 2 mg/kg B2/G2.

(An efficient method for the determination of aflatoxin M1 in milk and milk powder in the lower ppt region.) Lebensm. Hyg. 74, 140-146 (1983).TLC of aflatoxin M1 on silica with 1a) ether, 1b) toluene - ethyl acetate - formic acid 6:3:1, after drying, marking and cutting, development in opposite direction with chloroform - acetone - 2-propanol 87:10:3. Detection by UV 364 nm. In situ fluorometry. Detection limit 3-5 ng per kg.

J. Agric. Food Chem. 32, 997-998 (1984). Development of a TLC bioautographic method for the semiquantitative determination of salinomycin sodium using silica sheets with hexane - ether - methanol - acetic acid 70:30:4:0.5. Bacillus stearothermophilus as assay organism and an assay medium containing triphenyltetrazolium chloride as indicator.

Magyar Kemiai Folyoirat, 97, 493-509 (1991). TLC of 3-formylcephalosporins on silica with hexane – ethyl acetate 1:1, 3:7, or 2:3. Detection under UV 366 nm or by spraying with ammonium molibdate reagent.

strain S24. Arzneim.-Forsch./Drug Res. 56, 171-179 (2007). TLC of SJA-95 and mycosamine on silica gel with butanol - acetic acid - water - tetrahydrofuran 6:2:2:1 and butanol - acetic acid - water - dioxane 6:2:2:1. Detection under UV 254 nm and under white light after spraying with ninhydrin reagent.

J. Liq. Chromatogr. Relat. Technol. 33, 894-902 (2010). Five amphoteric piperazynyl fluoroquinolones and flumequine were analyzed in an RP system on C8 plates with acetonitrile/aqueous acidic mobile phases containing various concentrations of potassium perchlorate. Perchlorate as a so-called chaotropic ion caused the increase in the retention of basic fluoroquinolones. TLC of sarafloxacin, difloxacin, norfloxacin, enrofloxacin, ciprofloxacin, and flumequine on RP-8 with acetonitrile - water containing constant concentration of citric acid but various concentrations of potassium perchorate. After air-drying, fluoroquinolone zones were detected at 366 nm and 254 nm and flumequine only at 254 nm. The retention increased with the increasing concentrations of perchlorate ion in the mobile phase and achieved a plateau for the mobile phases containing 10-20 mM of chaotropic perchlorate.

J. Planar Chromatogr. 26, 409-416 (2013). TLC bioautography of tylosin (1), spiramycin (2), and erythromycin (3) residues in the meat of Egyptian buffaloes on silica gel with methanol - ethyl acetate - acetone 5:3:2. The hRf values of (1) to (3) were 80, 41 and 20, respectively. Linearity was between 15-120 ng/zone for (1), 50-200 ng/zone for (2) and 1-20 ng/zone for (3). LOD for (1) to (3) were 12, 45 and 2 ng/g, respectively. Recovery (by standard addition) was found to be 84.2-92.2 %. Precision as %RSD was below 7.6 %. Bioautography was performed after development according to the method by J. Michard et al. (Method protocol for the detection of tylosin, spiramycin and virginiamycin in animal feedingstuffs by thin layer chromatography. SIMBAG-FEED Report 4.6. RIKILT, 2005). TLC plates were dried at 60 °C for 30 min in a petri dish and then covered to a thickness of 1.5 mm with agar medium containing the bacterial suspension. After incubation over night at 35 °C about 5 mL of 2,3,5-triphenyltetrazolium chloride solution (0.1 g in 100 mL water) was poured on the medium and re-incubated for some minutes. The inhibition zones were measured and their hRf values were compared with those of antibiotic standards. Detection was considered positive if the hRf value of the sample’s inhibition zone is ±5 % of the standard.