Creative Gas Detection Solutions

environmental Gas Chromatograph Lab Application Data – 1-3 Butadiene in Ambient Air

The eGC® measures trace ppbv levels of 1-3 butadiene in ambient air in chemical process manufacturing environments. The eGC® is ideal for fenceline or remote monitoring applications where the specific measurement of 1-3 butadiene in atmospheres containing interfering chemicals is essential.



The eGC® automatically samples the air, performs a gas chromatographic analysis and sends a report on a ten-minute cycle. The system generates a continuous record of 1-3 butadiene emissions that is logged on the eGC® and also uploaded to a user-accessible web server via an on-board cellular modem. The eGC® is unique in its ability to operate in uncontrolled hot and cold environments. An accessory wind speed and direction sensor makes the eGC® a highly effective area monitor, giving a near real-time picture of the site emissions. Using an array of eGC® units for vector triangulation of emissions provides a way to quickly locate emission sources. The near real-time reporting of the eGC® provides valuable temporal information that is very complementary to sample canister or passive tube collection methods.



  • Fully autonomous operation
  • No shelter or wiring construction required
  • Automatic calibration
  • Laboratory level data quality assurance
  • Analysis data fused with local weather conditions and GIS position
  • Intuitive graphical data website
  • E-mail and text alarm alerts
  • Limited maintenance



The eGC® uses a selective sorbent trap and thermal desorption to inject a sample of ambient air into the gas chromatograph. The GC column separates 1-3 butadiene from other chemicals in the sample. These chemicals elute sequentially into a solid-state hydrocarbon detector that measures the 1-3 butadiene present and generates the analytical result. Upon completion of the analysis time, the GC system is automatically backflushed and prepared for the next analysis.




1-3 Butadiene Application
Measurement Range: 1.0 to 200ppb
Analysis Time: 10 Minutes
Column: 0.53mm x 10m
Column Temperature: +55°C
Amibent Temperature: -10°C to +45°C
Power Input: 12 VDC @ 5A (max)
110-240 VAC
eGC® Precision: ±5%
Calibration Std. Accuracy: ±10%



10.0ppb Calibration Standard




Calibration Range 1.0ppb to 200ppb





eGC® 110-240 VAC: P/N X1003021
eGC® 12VDC: P/N X1003001
Solar Power Kit: P/N X1003511
Weather Kit: P/N X3342000



Contact ENMET’s application team for additional information.


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