HT-2 Toxin in verschimmelten pflanzlichen Nahrungsmitteln. (Quantitative determination of trichothecenes HT-2 toxin in moldy cereal grains and vegetable food.) Z. Lebensm. Unters. Forsch. 175, 169-172 (1982). Two-dimensional TLC of HT-2 toxin, T-2 toxin, acetyl-T-2 toxin on silica with 1) chloroform - methanol 85:15, 2) benzene - acetone 7:3. Detection by spraying with 25 % H2SO4 and heating for 10 minutes at 110 °C. Quantification by in situ fluorometry (excitation 365 nm; emission > 390 nm).

Part II. Proc. of the Sixth Int. Congress of Food Science and Technology, Dublin. Vol.3, 53-54 (1983). TLC of aflatoxins on silica with benzene - ethyl acetate - ethanol 30:19:1 and of ochratoxin and zearalenone on silica with toluene - ethyl acetate - 90 % formic acid 30:15:5. Detection for aflatoxins by spraying with 50 % sulfuric acid in ethanol, and for ochratoxin and zearalenone by spraying with 20 % aluminum chloride in ethanol.

J. Agric. Food Chem. 32, 411-413 (1984). TLC of penitrem A, verruculogen, fumitremorgin A, fumitremorgin B, fumitremorgin C on silica with a) toluene - ethyl acetate - formic acid 5:4:1, b) chloroform - acetone 93:7. Detection by spraying with 50 % sulfuric acid in ethanol and heating and by UV 366 nm, and with 1 % p - dimethylamino-benzaldehyde in ethanol. Detection limit 50 ng (about 10 ppb).

(Determination and differentation of the essential ingredients in hops with TLC, HPTLC and IR.) MERCK Spectrum 1, 54-56 (1988). TLC of humulon, lupulon, xanthohumol and chlorophyll on silica with cyclohexane - ethyl acetate - propionic acid 60:38:2. Detection under UV at 365 nm.

Chinese J. Pharm. Ind. (Yiyao Gongye Zazhi) 23, 507, 506 (1993). TLC of clindamycin and lincomycin on silica with chloroform - methanol 3:1. Comparison of the method with other procedures.

J. AOAC Int. 92, 1068-1075 (2009). TLC and HPTLC of six antibiotics (amikacin, gentamicin, kanamycin, neomycin, netilmicin, and tobramycin) in pharmaceutical preparations on silica gel with methanol - 25 % ammonia - chloroform 3:2:1. Detection by derivatization with 0.2 % ethanolic ninhydrin reagent. Quantitative determination by absorbance measurement at 500 nm. The limit of detection and quantification was 250 and 500 ng/zone for amikacin, 500 and 1000 ng/zone for kanamycin, 480 and 800 ng/zone for neomycin, 380 and 630 ng/zone for netilmycin, 480 and 800 ng/zone for tobramycin and 1000 and 1650 ng/zone for gentamicin. Precision was good with %RSD of 0.3-0.6 %.

J. AOAC Int. 94, 735-742 (2011). HPTLC and TLC of ofloxacin on silica gel with ethanol - conc. ammonia 4:1 in a horizontal chamber. Quantitative determination by fluorescence measurement at 313 nm. Simulated samples at a residue level of 1 mg/m² were prepared by spreading the calculated amount of ofloxacin solution on 1, 5, and 10 dm² stainless steel surfaces. The hRf of ofloxacin was 56. The mean recovery (n = 6) was 88.6-95.3 % with a CV of 3.8-4.9 %. The LOD was 0.6 ng/zone and the LOQ was 2 ng/zone, but it was shown that these can be lowered by immersion of the developed plate into a solution of liquid paraffin - n-hexane 1:2 to approximately 0.3 and 0.9 ng/zone. The repeatability (system precision) was 4.2 % for 2 ng, and 3.7 % for 20 ng. The recovery was between 88.6-95.3 %.

J. Liq. Chromatogr. Relat. Technol. 37, 2915-2918 (2014). HPTLC of danofloxacin on silica gel with methanol – acetone – 1M citric acid – triethylamine 28:20:2:5. Quantitative determination by absorbance measurement at 280 nm. The hRF value for danofloxacin was 30. Linearity was in the range of 1250-3750 ng/zone. The intermediate/interday/intra-day precisions were below 1 % (n=3). The LOD and LOQ were 1.3 and 3.8 ng/zone, respectively. Recovery was in the range of 97.3-95.6 %.