The eGC® benzene application is configured to operate in a refinery environment typically associated with petroleum storage tanks, wastewater treatment plants and petroleum transfer stations.
The eGC® is a highly specific monitor capable of measuring trace (i.e., sub-ppbv) levels of benzene in ambient air in complex refinery environments. This data sheet describes the performance of many non-target chemicals at varying concentration levels that can be potentially interferants to most gas chromatographic methods.
The eGC® achieves this chemical specificity by collecting ambient air samples using a thermally desorbed concentrator and not using direct injection of the sample.
Using a sample collection concentrator offers several analysis advantages which are listed below.
- Sample enrichment avoids the noise and drift associated with the need to operate the detector at the high gain often required for ppb analysis.
- The collection adsorption media can be configured to act as a sample filter to collect chemicals that have specific properties.
- The desorption process can be configured to only allow the release of a specific range of chemicals limiting the analysis complexity and reducing the analysis cycle time.
The eGC® uses the combination of a selective sorbent trap, a selective chromatographic column and a long-life, C-H bond sensitive solid -state detector to provide the consistent separation and measurement of benzene from other similar hydrocarbons.
Typical non-target hydrocarbon performance on the eGC® analytical column.