A specialist in monitoring instrumentation for air quality and greenhouse gases, Enviro Technology Services (ETS) is now offering the Model 4 Semi-Continuous OC-EC (Organic Carbon and Elemental Carbon) carbon analyser from Sunset Laboratory. The unit apparently incorporates the latest advances in electronic and optical technology, along with an optimized oven and detector designed for sensitive and reliable field operation. It’s also rack mountable.
Features include an easy access panel for filter service and calibration, safety mechanisms and inline pressure regulators for superior flow control. The computer controlled flow system aids enhanced sensitivity and fast analysis times and improved user access for simplified maintenance and service.
It’s small, rugged design makes it ideal for field operation in air quality monitoring shelters, says ETS.
The Sunset Laboratory Model 4 OC-EC Field Analyser is said to be ideal for:
– Ambient air quality and environmental exposure measurements
– Indoor air exposure assessment monitoring
– Long-term environmental research such as studying the effects of regulatory changes
– NIOSH (and equivalent) exposure assessments in the workplace
– In addition to the Model 4 Field Analyser the Model 5 Lab OC-EC Aerosol Analyser is also now available via ET.
The Model 5 uses a proven thermal-optical method to analyse for organic and elemental carbon aerosols collected on quartz filters.
Features include a temperature controlled diode laser, an integrated 16-bit data system/CPU board, redesigned power control hardware, automated flow controls, and software making this the most reliable OC-EC analyser on the market.
The samples are thermally desorbed from the filter medium under an inert helium atmosphere followed by an oxidizing atmosphere using carefully controlled heating ramps.
A flame ionization detector (FID) is used to monitor the analysis. Proven low dead volume carrier gas control system and proprietary quartz oven design provide high sensitivity with ultra-low carbon background and no oxygen contamination.
This instrument has been used to analyse a wide variety of sample types, including: ambient urban and rural areas, national parklands, forest fire plumes and oil fires from the Gulf War.
