Phillips Petroleum Company

Phillips Phillips Petroleum

William H Dennis

Richard Sanford

Robert W Dahlgren

A gas chromatograph in which a first portion of sample peaks are eluted in forward flow mode and a second portion of sample peaks are eluted in reverse flow mode without loss of resolution.

Gas chromatography

At least one air pollutant is concentrated at the source from which the sample of air is obtained. The thus concentrated at least one air pollutant is provided through conduits to a central analyzer for analysis. Concentration of the air pollutant results in reducing transport losses and also the sensitivity of the detector utilized to detect the at least one air pollutant can be greatly increased.

Air pollution detection

A quantitative analysis of the concentration of an eluted component, the dielectric constant of an eluted component and/or the refractive index of the eluted component is obtained using a chromatographic analyzer in combination with both a refractive index detector and a dielectric constant detector without the need to calibrate either the refractive index detector or the dielectric constant detector for each component in a sample. The dielectric constant detector and the refractive index detector are utilized to analyze a sample provided from a chromatographic analyzer. The concentration of the eluted component is a function of the magnitude of the output from each of the detectors. In like manner, the dielectric constant of the eluted component and the refractive index of the eluted component is a function of the output from the two detectors. The magnitude of the output from the two detectors is combined to give the concentration of an eluted component, the dielectric constant of the eluted component and the refractive index of the eluted component without the necessity of calibrating the detectors for each component in a sample.

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Bartlesville, OK, United States of America

William H Dennis