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Petrochem DHA

Detailed hydrocarbon analysis (DHA) is performed on long non-polar columns. Elution occurs in order of lowest boiling point to highest. Figure 1 shows a chromatogram of a gasoline sample using a 100 m Petrocol® DH column. The long column length and 60 °C isothermal oven temperature allow the separation of many components in this complex sample. Compounds identified range from propane (peak 1) to 1-methylnaphthalene (peak 96). Retention index libraries exist for this column, adding to its usefulness.

Petrochem DHA

Figure 1. Detailed Hydrocarbon Analysis (DHA)




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