Elemental analysis by gas chromatography

Determination of oxygen in organic substances by reaction-frontal gas chromatography

“…After a plateau of the H20 front has been established, the remainder of the gas in the dilution chamber is exhausted to the atmosphere [13c, 14b, 15b]. The effluent from the column enters the measuring cell of a katharometer [6], and the recorder [8] provides the corresponding adsorption frontal chromatogram (Figure 3). The heights of the adsorption fronts are proportional to the concentrations of the components within the dilution chamber (6), which is the basis for the calculation of the results.…”

“…The effluent from the column enters the measuring cell of a katharometer [6], and the recorder [8] provides the corresponding adsorption frontal chromatogram (Figure 3). The heights of the adsorption fronts are proportional to the concentrations of the components within the dilution chamber (6), which is the basis for the calculation of the results. After the adsorption frontal development has been completed and the dilution chamber emptied, further sample is pyrolyzed in the pyrolytic section [13a, 14b, 15a] while the chromatographic column [5] is flushed with helium which gradually elutes the adsorbed components out of the column.…”

“…After the adsorption frontal development has been completed and the dilution chamber emptied, further sample is pyrolyzed in the pyrolytic section [13a, 14b, 15a] while the chromatographic column [5] is flushed with helium which gradually elutes the adsorbed components out of the column. The effluent again enters the measuring cell of the katharometer [6] and the recorder [8] provides the corresponding desorption frontal chromatogram (Figure 3). The chromatographic column was made of a 130 cm long, 0.3 cm i.d.…”

Determination of hydrogen in metals by a combination of the so-called carrier gas method and the technique of frontal chromatography

“…In this paper, we present the determination of the content of diffusable hydrogen in metallic materials by employing frontal chromatographic development, used by us successfully in the elemental determination of carbon, hydrogen, and nitrogen in organic substances (8,9). In this method, the dilution of the sample is a prerequisite, and the dilution system is a basic component of the gas chromatograph.…”