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Analysis: Gasoline
Detailed Hydrocarbon Analysis (DHA) D6730
• Column: 100m x 0.25mm x 0.50um Rtx-DHA 100
• Tuning column: 5m x 0.25mm x 1.0um Rtx-5
• Tuning column is for adjusting selectivity for
aromatics
Biggest Challenges for Customers
Running ASTM D6730
• Have good peak shape for alcohols
• Have sufficient theoretical plates to separate the
complex samples
• Coupling of “tuning” capillary
• Analysis time too long, wish for faster methods
• Reproducibility of column-column quality
parameters
Why do the Refiners Run DHA
Analysis?
• At the end a certain gasoline
must have a certain octane
number..
• It is very important for the
refiner to monitor the blending
process carefully to avoid too
much yield.
Different octane numbers are
available
• Accurate DHA analysis can
save a lot of money ..