Gas-Liquid and Thin-Layer Chromatography

Mahel ova et al. [10] determined BHC isomers in soil by gas-liquid and thin layer chromatography after extraction with light petroleum. An air-dried, ground sample (18mesh) (20g) was deactivated by addition of 25% of water and set aside for 24h. Siloxid (active silica) was added to form a powdery mixture, which was extracted with 250ml of light petroleum... 

Grant DL, Sherwood CR, McCully KA. 1969. Gas-liquid and thin-layer chromatography of phorate. disulfoton and five of their oxidation products. J Chromatogr 44 67-74. 

Sawicki, E., T. W. Stanley, S. McPherson, and M. Morgan. Use of gas-liquid and thin-layer chromatography in characterising air pollutants by fluorometry. Talanta 13 619-629, 1966. 

No doubt as a result of the continuing widespread use of alkaloid-containing drugs, new and sensitive analytical methods for their identification have been developed. For example, amphetamines and phenethylamines in blood and urine have been determined by gas chromatography as their corresponding acetamide derivatives5 or directly by combination of fluorometry, gas-liquid and thin-layer chromatographies.6 The latter technique may also be used independently for this purpose.7,8... 

Using gas-liquid and thin layer chromatography techniques, the only intermediate product detected and identified during the oxidation of parathion with CI2 or CIO2 was paraoxon. Paraoxon accumulates in the system from the parathion-Cl2 or parathion-C102 reactions, but not in a stoichiometric amount. The amounts of CI2 and CIO2 required to oxidize completely 1.012 mg/liter paraoxon were determined graphically to be equal to 38.95 mg/liter and 44.50 mg/liter, respectively, within a contact time of 60 minutes. 

Child, P., Kuksis, A., and Myher, J. J. Resolution of Saturated and Unsaturated 53-Cholanoic Acids by Gas-Liquid and Thin-Layer Chromatography... 

Due to the small beam diameter ( 1 mm to 1 /xm) of the laser excitation source, only small samples are required (<1 /xg). This allows the technique to be easily coupled to gas, liquid, and thin-layer chromatography separation techniques. Moreover, this allows for high spatial resolution of samples. 

Zweig, G. and J. Sherma (eds.), CRC Handbook of Chromatography Polymers , CRC Press, Boca Raton, FL, vol. 1, 1982. One part describes the techniques applicable to polymeric materials, and the second part gives data tables for gas, pyrolysis gas, liquid and thin layer chromatography. 

Work on the determination of chlorinated insecticides has been almost exclusively in the area of gas chromatography using different types of detection systems, although a limited amount of work has been carried out using liquid chromatography and thin-layer chromatography. 

Ibrahim, F.B., Gilbert, J.M., Evans, R.T., and Cavagnol, J.C. Decomposition of disyston (0,0-diethyl 5-[2-(ethylthio)ethyl] phosphorodithioate) on fertilizers by infrared, gas-liquid chromatography, and thin-layer chromatography. J. Agric. Food Chem., 17(2) 300-305, 1969. 

The principle methods used for the determination of triazine-type herbicides are gas chromatography (Table 4.6) and high-performance liquid chromatography (Table 4.7). Other methods that have been used include isota-choelectrophoresis [369], ELISA [370-375], spectrophotometry [376,377] and thin-layer chromatography [378] (Table 4.8). 

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