Key facts
- Brand
- Varian
- Model
- 450-GC
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-06-12
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Varian 450-GC Fast Detailed Hydrocarbon Analysis Application Note SI-1285
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.
Varian 450-GC specifications
| 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 |
Source: Varian 450-GC Fast Detailed Hydrocarbon Analysis Application Note SI-1285
All Varian 450-GC documents by type
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
Which column is used for this fast method?
A 40 m x 0.1 mm x 0.2 um CP-Sil PONA CB column.
From: Varian 450-GC Fast Detailed Hydrocarbon Analysis Application Note SI-1285
What software is used for GC control and DHA calculations?
Galaxie Software from Varian, which has the DHA software fully integrated.
From: Varian 450-GC Fast Detailed Hydrocarbon Analysis Application Note SI-1285
What are the minimum S/N ratio requirements for Class 1 chemicals in Procedure A?
The minimum requirement is a Signal-to-noise (S/N) ratio > 3.
From: Varian 450-GC Gas Chromatograph Application Note for Residual Solvent Determination
What is the minimum required signal-to-noise ratio for Class 1 chemicals in Procedure A?
The minimum required signal-to-noise ratio for Class 1 chemicals in Procedure A is greater than 3.
From: Varian 450-GC Gas Chromatograph Application Note for Residual Solvent Determination