This document presents a detailed hydrocarbon analysis of petroleum naphthas using the ASTM D 5134 method. The method utilizes Varian's GC instrumentation and CP-Sil PONA CB™ column to determine hydrocarbon components eluting after n-nonane. This method is important for quality control, controlling refinery processes, and evaluating raw materials.
The document details a method for determining hydrocarbon components in petroleum naphthas, specifically covering components eluting after n-nonane as a single group. The procedure utilizes a high-resolution GC capillary column (CP-Sil PONA CB) and requires an olefin content lower than 2% to prevent co-elutions.
The analysis employs the Varian 450-GC Gas Chromatograph equipped with specific instrumentation including a split/splitless injector, FID detector, and CP-8400 Autosampler. Data is processed using Galaxie software integrated with DHA (Detailed Hydrocarbon Analysis) software to calculate weight percent profiles, volume percent profiles, and physical properties such as TBP, RON, and density.
The olefin content (v/v) must be lower than 2% to avoid serious co-elutions.
The method covers the determination of hydrocarbon components according to ASTM D 5134.
Galaxie Software from Varian is used for GC control, while DHA software calculates detailed hydrocarbon analysis.