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Application of the Dimethyl Sulfate Test for Determining Small Amounts of Petroleum or Asphalt Products in Tars

Charles S. Reeve, Richard H. Lewis
1913 Journal of Industrial & Engineering Chemistry  
INTRODUCTORY The recent production of mixtures of t a r with various asphalt and petroleum products for use in the road and paving industry has necessitated a satisfactory method for determining the proportions of each type of material present in such mixtures. The authors have based their research on the well-known dimethyl sulfate test proposed by Valenta? and later investigated and reported upon by Graefes and Harrison and Perkin.4 A. Sommers modified the test in order to render i t
more » ... render i t applicable for the estimation of asphalt in tar-asphalt mixtures, and Chapin6 now uses it in a modified form for the detection of adulterants in coal t a r creosote sheep dips. -4 brief review of the literature upon the test to date will, therefore, prove of value, before submitting our data.
doi:10.1021/ie50052a009 fatcat:346sedupszguzhhdocrn65iqfu