Talanta 39, 1361-1367 (1992). Use of the reaction between thiocarbamate herbicides and 2.6-dichlorobenzoquinone-N-chloroimine or 2,6-dibromo-benzoquinone-N-chloroimine for the detection of these herbicides on TLC plate with high sensitivity. Discussion of the reaction mechanism. Also IR, NMR and MS.

J. Liq. Chromatogr. 23, 273-280 (2000). Description of two methods, one on the basis of relative error in yi (YWLS) and another on the basis of 1/xi as a weighting factor (XWLS), for the calculation of calibration functions and comparison with conventional ordinary (OLS) and simple weighted least square method (WLS). Instead of the coefficient of correlation, six coefficients of quality are used to characterize the quality of the calibration functions. - TLC of atrazine, propazine and simazine on silica gel using toluene - acetone 17:3. Detection under UV 254 nm; quantitation by densitometry in reflectance mode at 225 nm.

J. Planar Chromatogr. 18, 85-88 (2005). 11 HPTLC of fenoxaprop-p-ethyl and degradation products on silica gel (prewashed with methanol - chloroform 1:1 and activated at 110 °C for 30 min) in a twin-trough chamber with toluene - dichloromethane 7:3. Visualization on irradiation with an UV lamp at 236 nm. Quantitative determination by absorbance measurement at 236 nm.

Determination of cymoxanil residues in vegetable.) TLC of cymoxanil residues on silica with hexane - acetone 2:1. Detection by spraying with o-tolidine reagent. Sensibility: 0.05 mg/kg, recovery: 65-80 %.

J. Planar Chromatogr. 10, 124-127 (1997). Development of a new color reaction based on the formation of black lead sulfide by treatment of mancozeb with alkaline plumbite solution. TLC of mancozeb on silica gel cellulose, calcium sulfate, titanium oxide, soil, etc. Detection limit 0.45 µg/spot. Fungicides other than dithiocarbamates do not interfere.

J. Liq. Chromatogr. Relat. Technol. 33, 980-995 (2010). HPTLC of bronopol and Kathon CG on silica gel (pre-washed with methanol) with methanol - dichloromethane - n-hexane 2:12:7. For detection, luminescent Vibrio fischeri bacteria were cultivated. Plates were dried for 30-40 min at 120 °C on a plate heater and then immersed for 1 s in the bacteria suspension using an immersion device and a glass dip tank. Excess bacteria suspension was removed. Images were taken using the BioLuminizer with an exposure time of 55 s. The effective and reasonably fast quantitative method is in routine use at several laboratories.

J.A.O.A.C. 69, 646-651 (1986). TLC purification of N-methyl- and N-ethyl-1,3-propanediamine -bis-2-nitro-4-trifluoromethylphenyl derivatives on silica with toluene - ethyl acetate 85:15. Detection by UV 254 nm.

J. Agric. Food Chem. 39, 977-980 (1991). TLC of koninginin B and dihydrokoninginin B on silica with toluene - ethyl acetate - formic acid 5:4:1, visualization with UV 254/366 nm or by spraying with anisaldehyde and heating.