Automatic chromatographic determination

Durand, J.P., Y. Boscher and N. Petroff (1987), Automatic gas chromatographic determination of gasoline components. Application to octane number determination . Journal of chromatography, No. 395, p. 229. 

The combined acetone extracts were extracted six times with one-fourth volume of ethylene dichloride and the ethylene dichloride extract was evaporated under vacuum to leave the steroid residue. This steroid residue was taken up in a minimum of methylene chloride and applied to the top of a column packed with 30 grams of silica which had been previously triturated with 21 ml of ethylene glycol. Then various developing mixtures, saturated with ethylene glycol, were passed over the column. Cuts were made as each steroid was eluted as determined by the lowering of the absorption of light at 240 mp on the automatic chromatographic fraction cutter. 

Gonzales, M., Gallego, M., and Valcarcel, M., Liquid chromatographic determination of natural and synthetic colorants in lyophilized foods using an automatic sohd-phase extraction system, J. Agric. Food Chem., 51, 2121, 2003. 

Ballesteros E, Gallego M, Valcarcel M. 1990. Gas chromatographic determination of phenol compounds with automatic continuous extraction and derivatization. J Chromatogr 518 59-67. 

Moore, S., and Stein, W. H. (1963). Chromatographic Determination of Amino Acids by Use of Automatic Recording Equipment. Methods Enzymol 6 819. 

Lindegard B, Bjork H, Jonsson JA, Mathiasson L, and Olsson A-M. Automatic column liquid chromatographic determination of a basic drug in blood plasma using the supported liquid membrane technique for sample pretreatment. Anal. Chem. 1994 66 4490-4497. 

Melcher RG and Bouyoucos SA. Membrane interface for automatic extraction and liquid chromatographic determination of trace organics in aqueous streams. Process Control Qual. 1990 1 63-74. 

Hollweg, J., H.-J. Schumacher, and F. Seehofer AutomatisiertegaschromatographischeSunultanbestim-mung von Nicotin und Wasser un Tabakrauchkondensat [Automatic simultaneous gas chromatographic determination of nicotine and water in tobacco smoke condensate] Beitr. Tabakforsch. Int. 11 (1981) 39-43. 1829. 

Moore S. and Stein W. H (1963) Chromatographic determination of amino acids by the use of automatic recording equipment. Meth Enzymol 6, 819-831... 

Methods for the Automatic Gas Chromatographic Determination of Blood Alcohol Concentrations Blutalkohol 12(3) 204-210 (1975) CA 86 151085h Review... 

Table 18.5 Characteristics and figures of merit for automated solid-phase extraction of riboflavin and determination by HPLC-DAD. The procedure proposed by Oliveira et al. (2010) is based on automatic SPE using a renewable column of commercially available molecularly imprinted polymers selective to riboflavin. The solid-phase extraction procedure was coupled online to the reversed phase chromatographic determination, resorting to a monolithic silica C18 column.

Esteban, R.E. Martinez-Castro, L and Sanz, J. Evaluation and optimization of the automatic thermal desorption method in the gas chromatographic determination of plant volatile compounds. Journal of Chromatography 1993, 657, 155-164. 

E Bahesteros, M Gahego, M Valcarcel. Gas chromatographic determination of cholesterol and tocopherols in edible oils and fats with automatic removal of interfering triglycerides. J Chromatogr A 719 221-227, 1996. 

Christensen JM, Rasmussen K, Koppen B. 1988. Automatic headspace gas chromatographic method for the simultaneous determination of trichloroethylene and metabolites in blood and urine. J Chromatogr 442 317-323. 

SEC became the most widely used method for molar mass and molar mass distribution determination due to its broad applicability, easy sample preparation, and the large amount of information resulting from the full distribution curve. The commercially available SEC systems work automatically with small sample amounts and even at elevated temperatures. In addition, chromatographic systems coupled with spectroscopic methods giving chemical information on the separated fractions gain more and more importance for analysis of complex polymer systems and mixtures. 

Naulet et al. [223] compared three chromatographic techniques lEC on an automatic amino acid analyzer, HPLC (with phenylisothiocyanate derivatization) and GC for the determination of the free amino acid content in 64 orange juices from different countries. The consistency of the different methods was estimated by considering the mean standard deviation for the set of amino acids observed. The best consistency was observed between lEC and HPLC. 

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