Abstract
Abstract A method for determining the possible presence of carcinogenic polycyclic aromatic hydrocarbons in petroleum waxes is based o n the maximum absorbance within four wavelength ranges of an extract prepared by chromatography. The procedure involves chromatography on silica gel and partition of the adsorbate between cyclohexane and nitromethane, followed, if necessary, by a second chromatography on silica gel impregnated with nitromethane.
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