This application note describes a fast DHA method. By using a 40 m x 0.1 mm x 0.2 µm CP-Sil PONA CB column, the analysis time is reduced, depending on the sample type, to 20 to 40 minutes.
The document details a rapid Detailed Hydrocarbon Analysis (DHA) method that reduces analysis time to 20-40 minutes, compared to standard methods which exceed two hours. This speed is achieved by utilizing a specific CP-Sil PONA CB column configuration with the Varian 450-GC system.
The note provides comprehensive instrumentation settings, including injector and detector temperatures, carrier gas flow, and oven temperature programming. It presents chromatographic results for naphtha samples, identifying over 130 individual hydrocarbon components and grouping them into PIONA categories (Paraffins, Isoparaffins, Olefins, Naphthenes, Aromatics). Additionally, the document includes calculated physical properties such as Motor Octane Number (MON), Research Octane Number (RON), density, and boiling point distribution.
| Column Length | 40 m |
|---|---|
| Column Inner Diameter | 0.1 mm |
| Column Film Thickness | 0.2 um |
| Injector Temperature | 250 °C |
| Detector Temperature | 300 °C |
| Carrier Gas Pressure | 95 psi |
| Injection Volume | 1 uL |
A 40 m x 0.1 mm x 0.2 um CP-Sil PONA CB column.
Galaxie Software from Varian, which has the DHA software fully integrated.