Fluorescent Indicator Adsorption Method for Hydrocarbon Type Analysis

Routine Compound Class Separation and Analysis of Heavy Petroleum Fractions by Adsorpton Chromatography

“…°A paraffinic light straightrun gas oil (440-720°F.). 6 A naphthenic light straightrun gas oil (430-670°F.). ' Polyfunctional sulfides were not separately determined in this series of tests.…”

“…Adsorption chromatographic separation, followed by further characterization of the resulting fractions by other analytical methods, permits a highly detailed analysis of most petroleum samples and has been frequently used for nonroutine analyses of petroleum-e.g., (2,8). A number of papers have described more or less routine procedures for the separation of high boiling samples into several compound class fractions by adsorption chromatography-e.g., (1,6,9), and many petroleum laboratories have similar unpublished methods; none of these procedures appears quantitative, however, or even applicable to a wide range of sample types-e.g. see (18) for a discussion of the problems involved.…”

Combination Acid Treatment-Adsorption Method for Determination of Saturates in Heavy Petroleum Oils

“…Knight and Groennings (4) modified the fluorescent indicator adsorption method (1) to accommodate gas oil and lube oil samples. Snyder (8) applied the linear elution adsorption technique to the separation of paraffins plus olefins from aromatics in gas oil.…”

Routine Separation and Determination of Total Saturated Hydrocarbons in Heavy Petroleum Samples by Adsorption Chromatography.

“…Other methods for the determination of saturates in such samples include FIA (9) and acid solubility (l). The publication of yet another such procedure for the separation and determination of total sample saturates therefore requires some justification.…”