Patent ID: 6451615
Filing Date: 2002-09-17
Classification: G01N,Y10T

Abstract:
Colored indicator for measuring by liquid phase colum chromatography the amounts of hydrocarbon compounds selected from saturated, olefinic and aromatic hydrocarbons' families present in a mixture, said mixture including oxygenated compounds, said indicator comprising various colorants that are able to be eluted selectively with each of said families and expressing different colors for each of them and that are provided in quantities sufficient to detect boundaries of colored zones on a chromatography column,comprising colorants that are able to be selectively eluted with the families of aromatic hydrocarbons, said colorants being free of organic compounds having an affinity with oxygenated compounds having at least 6 carbon atoms, wherein the colored indicator is made from a colored indicator for use in the analysis method according to the ASTM D1319 standard, from which the colorants that are able to be eluted with the family of aromatic hydrocarbons and having an affinity with oxygenated compounds containing at least 6 carbon atoms have been eliminated.