UOP 990 PDF

Organic Analysis of Distillate by Comprehensive Two-Dimensional Gas Chromatography with Flame Ionization Detection

UOP 990 – Organic Analysis of Distillate by Comprehensive Two-Dimensional Gas Chromatography with Flame Ionization Detection

This method is for organic analysis of distillate or petroleum fractions boiling in the range of 36 – 435°C using comprehensive two-dimensional gas chromatography (GCxGC) coupled with a flame ionization detector (FID). Results, expressed in mass-% can be reported in three different formats: 1) molecular types indexed to n-alkanes; 2) molecular type homologous series by carbon number and 3) user specified resolved compounds or molecular type groups.Individual compounds and molecular type groups are identified by their location, as plotted on a chromatographic two-dimensional image.Olefins, unless specifically identified, are lumped with other molecular types, typically cycloparaffins.Heteroatomic species, when resolved, can be determined; otherwise they are lumped with other aromatic hydrocarbons.The lower limit of detection for a single molecular component is typically below 0.004 mass-% with the specified equipment..