Determination of Saturate Impurities in Aromatics

Abstract

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Determination of Trace Hydrocarbon Impurities in Petroleum Benzene and Toluene by Gas Chromatography

“…A comparison of the chromatographic results with those obtained using the physical property method (7) and differential infrared methods is given in Table II. These data show that the chromatographic methods are more sensitive.…”

“…Sensitive and accurate analytical methods are needed for specification and process control testing. In 1958, Wood, Martin, and Lipkin (7) published a physical property method for the determination of saturated hydrocarbon impurities in aromatics for levels of sensitivity below those attainable by the ASTM method (1). Differential infrared methods used for the determination of trace aromatic hydrocarbon impurities in aromatics can be made sensitive.…”

Applications of Carbowax 400 in Gas Chromatography for Extreme Aromatic Selectivity

“…Determinations of paraffinic impurities in high purity aromatics by the ASTM Kattwinkel reagent test are systematically low by 0.6% volume due to absorption of paraffins in acid and for this reason concentrations below 0.6% volume cannot be detected (10). From this fact and from the precision, accuracy, and sensitivity data presented above, the gas chromatographic method is concluded to be superior to the ASTM Kattwinkel reagent test for determining hydrocarbon impurities in high purity benzene and toluene.…”

“…The gas chromatographic method for the determination of hydrocarbon impurities in high-purity petroleum benzene and toluene is superior to the Kattwinkel reagent test (3), which is used currently. A refractive index method representing an improvement in sensitivity over the ASTM method has been described by Wood, Martin, and Lipkin (10). Fabrizio et al (7) recently published a gas chromatographic method for determining trace M., Zollinger, H., Helv.…”