This document describes the GC analysis of PAHs using an Agilent J&W FactorFour VF-17ms column with EZ-Guard. The EZ-Guard is a protective device used to trap non-volatile components from the sample matrix to restore column performance. The document also demonstrates the selectivity of the VF-17ms column in analyzing these important pollutants.
Polycyclic aromatic hydrocarbons (PAHs) are pollutants formed during incomplete combustion and pyrolysis. Legislation requires monitoring these substances in various matrices, which can introduce non-volatiles that diminish column performance.
The Agilent J&W FactorFour VF-17ms column is widely used for PAH analysis due to its high selectivity towards certain isomers. This document demonstrates the use of an EZ-Guard integrated with the column to trap non-volatile components, thereby extending column lifetime and maintaining resolution.
| Column Dimensions | 30 m x 0.25 mm ID, df=0.25 pm |
|---|---|
| Guard Part Number | CP9025 |
| Carrier Gas | He |
| Injector Temperature | 275 °C |
| Detector Type | FID |
The EZ-Guard traps non-volatile components from complex sample matrices to prevent them from adhering to the analytical column, thus restoring performance without losing resolution.
The EZ-Guard traps non-volatile components on its integrated guard, which prevents them from adhering to the analytical column and diminishing separation or detector response.
To restore performance, a meter of the EZ-Guard can be cut off, which allows the column to function again without losing resolution.
The column used is 30 m long, has an inner diameter of 0.25 mm, and a film thickness of 0.25 µm.