A Gas-Density Detector for Gas Chromatography.

Binary Diffusivities of Nitrogen-Methane and Nitrogen-Methyl Chloride Systems

“…The effluent gas from the diffusion cell was continuously analyzed by a gas density balance (Model which was used mainly by other investigators for quantitative work in gas chromatography (Martin and James, 1956;Guillemin et al, 1966Guillemin et al, , 1967Walsh, 1967). However, the linear relationship between the output voltage and the concentration difference of the reference and purge gases makes the gas density balance well suited for the measurement of gaseous diffusivity (Nerheim, 1963; Schefflan, 1971). Possible error for the determination of concentration is ±1.6%.…”

Bracket Method for Molecular Weight Determination of Pyrolysis Products Using Gas Chromatography with a Gas Density Detector.

“…Detection of Traces of Polynuclear Aromatics in Hydrocarbons by Gas Chromatography Sir: Traces of polynuclear aromatic hydrocarbons in petroleum products are usually determined by ultraviolet spectrometry (S) or gas chromatography (4). Isolation of the polynuclear aromatics and elimination of interferences is time-consuming.…”

Gas Chromatography

“…Several other articles cover detection techniques (296,350,494)• Among the mass sensing detectors, the "Brunei" device is novel and is based on the continuous adsorption and weighing of the eluted solutes (54). Gas density detectors were discussed (136) and Nerheim acquired three patents on his designs (412)(413)(414) in addition to describing the operating principle in a unique way (410). This unit is now commercially available from Gow-Mac Instrument Co. and was the subject of a systematic study to determine its usefulness and limitations (240).…”