Integrated, multiple-stage chromatographic method for the separation and identification of polycyclic aromatic hydrocarbons in complex coal liquids von Lucke, Richard B, Later, Douglas W, Wright, Cherylyn W, Chess, Edward K, Weimer, Walter C

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Closed-system, solid-phase extraction cleanup method for removal of normal paraffin hydrocarbon from samples prior to purge-and-trap volatile analysis von Lucke, Richard B, Campbell, James A, Ross, Gerald A, Goheen, Steven C, Hoppe, Eric W

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Preparation of coal liquids for chemical analysis and biological assay von Wright, C.W., Weimer, W.C., Later, D.W., Lucke, R.B.

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Initiation-promotion studies with fractionated coal liquids von Chess, E.K., Mahlum, D.D., Lucke, R.B., Weimer, U.C., Milson, B.W., Wright, C.

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