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Erickson, Mitchell D.; And Others – Environmental Science and Technology, 1978
The procedure and sampler described permits detection of less than 50pg of one polychlorinated naphthalene (PCN) isomer. The method uses gas chromatography-mass spectrometry. The PCNs are collected on a glass fiber filter and two polyurethane foam plugs and extracted with toluene at 25 degrees Celsius. (BB)
Descriptors: Air Pollution, Chemical Analysis, Chromatography, Instrumentation
Peer reviewed Peer reviewed
Palmieri, Margo D. – Journal of Chemical Education, 1988
Identifies the properties and characteristics of supercritical fluids. Discusses the methodology for supercritical fluid chromatography including flow rate, plate height, column efficiency, viscosity, and other factors. Reviews instruments, column types, and elution conditions. Lists supercritical fluid data for 22 compounds, mostly organic. (MVL)
Descriptors: Chemical Analysis, Chemistry, Chromatography, College Science
Peer reviewed Peer reviewed
Palmieri, Margo D. – Journal of Chemical Education, 1989
Discussed are selected application and future trends in supercritical fluid chromatography (SFC). The greatest application for SFC involves those analytes that are difficult to separate using GC or LC methods. Optimum conditions for SFC are examined. Provided are several example chromatograms. (MVL)
Descriptors: Chemical Analysis, Chemical Nomenclature, Chemistry, Chromatography