In this paper the gas chromatograph for the tropospheric measurements of the trace gases active in the greenhouse effect and the ozone layer destruction are described. For the measurements of the CO, CH4 and CO2 an automatic gas chromatograph
was constructed. For the CFCs monitoring the gas chromatographic system realizing the enrichment procedure of the air sample is presented. The construction and the operation of the photoemission electron capture type detector is described.
Enantiomeric (D/L) ratios of eight amino acids in three homogeneous powdered fossil Pleistocene mollusk samples have been compared. Eleven laboratories have contributed results to this effort. Three gas chromatographic methods and one ion-exchange
They used aerial photos, made by TM satellite, before the harvesting of wheat and maize. Then they took samples which were examined by various chromatographic investigations. Beside the hydrocarbon sites they showed different characters. Some
La pollution au benzène a été mesurée grâce à un chromatographe mobile dans la ville de Darmstadt. Certaines valeurs du benzène sont très fortes mais il n'y a pas de corrélation significative entre les fluctuations du trafic automobile et le degré