Analysis of Diesel using an Agilent J&W FactorFour VF-5ht UltiMetal Column

Significance of the Topic

Gas chromatography analysis of diesel fuel is crucial for quality control and compositional profiling in petrochemical industries. The use of robust, inert columns ensures reliable separation of hydrocarbons under demanding conditions.

Study Objectives and Overview

This application note evaluates the performance of a VF-5ht UltiMetal column for diesel analysis. The aim is to demonstrate high temperature stability and inertness for resolving linear and branched hydrocarbons from C9 to C26, including biomarkers.

Methodology and Instrumentation

• Sample preparation: Diesel diluted to 0.1 percent in pentane
• Chromatographic conditions: Oven program from 50 to 400 degrees Celsius at five degrees per minute
• Injection: Split mode at 325 degrees Celsius with a split ratio of one to one hundred, injection volume two microliters
• Carrier gas: Hydrogen at sixty five kilopascals
• Detection: Flame ionization detector at 340 degrees Celsius

Used Instrumentation

• Gas chromatograph configured for high temperature operation
• Agilent J&W FactorFour VF-5ht UltiMetal column, thirty meters by zero point two five millimeter internal diameter, film thickness zero point one micrometer, with a two meter retention gap

Main Results and Discussion

The VF-5ht UltiMetal column achieved baseline separation of n-alkanes from C9 through C26 alongside isoprenoid markers pristane and phytane. Peak shapes were sharp and symmetrical, indicating minimal interaction with the column surface. The column’s inert metal tubing and low bleed phase contributed to stable retention times and reproducible quantitation.

Benefits and Practical Applications

• Exceptional thermal stability up to four hundred degrees Celsius
• High inertness for trace hydrocarbon analysis
• Durable metal construction resists breakage and pressure fluctuations
• Applicable to fuel quality testing, environmental monitoring, and research laboratories

Future Trends and Potential Applications

Advancements may include coupling with two dimensional gas chromatography and mass spectrometry for detailed compositional analysis. The robust column material suits emerging biofuel testing, high throughput screening, and integration in portable GC systems.

Conclusion

The VF-5ht UltiMetal column delivers reliable high temperature performance and inertness for comprehensive diesel hydrocarbon profiling. Its mechanical strength and low bleed characteristics support demanding analytical workflows in petrochemical and environmental labs.

Reference

Oostdijk J Application Note SI-01131 Agilent Technologies October 2010