Abstract
Using total evaporation of crude oil fractions in the direct inlet the molecular weight distribution and the overall range of cycle numbers presented (“Zyklenanalyse”) via computer averaged integrating field ionisation mass spectrometry (FI-CAI) have been investigated. The correlation of the results with the data obtained from the standard EI-MS inverted matrix method revealed the maximal single deviation of 3.3%. The crude oil probes (0.1mg) contained saturated hydrocarbons in the range of 17 to 36 C-atoms. Limits, usability and the specific information of this method are discussed.
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