This document describes the GC analysis of base/neutral compounds using an Agilent J&W FactorFour VF-17ms column with EZ-Guard. The EZ-Guard is an integrated guard column that optimizes system uptime and extends column lifetime. The document also provides specific experimental methods and results discussion.
This document details the use of the EZ-Guard integrated guard column to extend the lifetime of GC columns when analyzing complex matrix samples, such as those found in EPA 8270 methods. The EZ-Guard is designed to be leak-tight and inert, preventing coupling issues and active sites that can degrade peak shape.
The note provides specific experimental parameters for analyzing a mixture of base and neutral compounds, including column dimensions, carrier gas, temperature programming, and detector settings. Results demonstrate excellent peak shapes for various components, confirming the effectiveness of the EZ-Guard in maintaining column performance.
| Column | FactorFour VF-17ms, 30 m x 0.25 mm, df=0.25 um |
|---|---|
| Guard Column | 10 m EZ-Guard (part number CP9025) |
| Sample Size | 1 uL |
| Split Ratio | 1:75 |
| Sample Concentration | 20 yg/mL methylene chloride |
| Carrier Gas | H2 |
| Pressure | 80 kPa |
| Oven Temperature Program | 50 °C to 300 °C (10 °C/min) |
| Injector Temperature | 275°C |
| Detector Temperature | 325°C |
| Detector Type | FID |
The EZ-Guard is an integrated guard column that is leak-tight and has no active sites, which helps maintain peak shapes and high responses while extending column lifetime.
The document mentions EPA 8270 as a multicomponent environmental method for analyzing basic and neutral components.
The EZ-Guard used in this analysis has the part number CP9025.