DRI MODEL 2015 series 2
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DRI MODEL 2015 series 2
The DRI Model 2015 series 2 Multi-Wavelength Thermal/Optical Carbon Analyzer enhances the widely-used DRI Model 2001 and DRI Model 2015 systems for quantifying organic carbon (OC), elemental carbon (EC, also termed Black Carbon [BC]), and temperature-separated carbon fractions on aerosol filter deposits. Most importantly, DRI Model 2015 series 2 features CE mark and improved technical features for reliable laboratory operation.
In multiple temperature fractions, DRI Model 2015 series 2 quantifies organic carbon (OC) and elemental carbon (EC, closely related to Black Carbon [BC]). It monitors both the optical transmittance and optical reflectance of the sample simultaneously at 7 wavelengths. These optical signals correct the thermal analysis for the effects of pyrolysis and allow for apportionment in terms of ‘Brown’ carbon, an indicator of biomass combustion. The DRI2015 series 2 represents a very major advance over the widely-used earlier models DRI-2001 and DRI 2015, particularly due to featuring CE mark.
The DRI instrument was designed by Professors J.C. Chow and J.G. Watson at the Desert Research Institute of the University of Nevada, Reno, USA. Manufacturing and commercialization of this highly sophisticated instrument were licensed to Magee Scientific Corporation, from California, the USA, and its partner company Aerosol d.o.o. from Ljubljana, Slovenia. The DRI2015 provides the most advanced and complete analysis of carbonaceous aerosol particles collected from the atmosphere or directly from sources.
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PRODUCT INFO
The DRI Model 2015 Series 2 Multiwavelength Thermal/Optical Carbon Analyzer enhances the widely-used DRI Model 2001 and DRI Model 2015 systems for quantifying organic carbon (OC), elemental carbon (EC, also termed Black Carbon [BC]), and temperature-separated carbon fractions on aerosol filter deposits (Chow et al., 1993). The Model 2015 Series 2 retains the consistency of OC and EC data with measurements performed on previous models; while reducing costs of supplies and maintenance compared with the Model 2001. Additionally, it also features CE mark.
DRI Model 2015 series 2 replaces the 633 nm optical monitoring that accounts for OC charring with reflected (R) and transmitted (T) intensities at wavelengths of 405, 445, 532, 635, 780, 808, and 980 nm. The additional optical information can be used to estimate multiwavelength light absorption of the sampled particles, infer the concentration of brown carbon (BrC) in each sample, and further complement the use of carbon fractions in source apportionment studies (Chen et al., 2015; Chow et al., 2015). Model 2015 Series 2 software includes temperature programs for commonly-used protocols such as IMPROVE_A (Chow et al., 2007; 2011), EUSAAR_2 (Cavalli et al., 2010), and NIOSH (Birch and Cary, 1996; Chow et al., 2001), and it can be programmed to emulate any other protocol. The simultaneous measurement of both R and T at all wavelengths throughout each analysis allows for reproducing any other thermal/optical method and holds potential for better characterizing additional properties of the carbonaceous aerosol.
CE MARKED
APPLICATIONS
- Air quality and climate change research
- Particulate Matter (PM) speciation trends networks
- PM source apportionment
- Carbonaceous material analysis
MAIN FEATURES AND IMPROVEMENTS
- New chassis with improved sample and oxygen oven design
- Efficient sample oven cooling system
- New flow manifold design
- New methane heater isolation
- State of the art NDIR sensor for more precise measurements
- Improved electronics design and additional safety features
- Updated Software (improved database manipulation)
- DRI Model 2015 series 2 measures reflected (R) and transmitted (T) intensities at wavelengths of 405, 445, 532, 635, 780, 808, and 980 nm. The additional optical information can be used to quantify the brown carbon (BrC) concentration in each sample.
OPERATING PRINCIPLE
Thermal/optical carbon analysis is based on the progressive decomposition of OC and EC fractions at increasing temperatures and inert or oxidizing atmospheres. A small punch from a sample collected on a quartz-fiber filter is heated in programmed temperature steps. Organic compounds are released in a non-oxidizing helium atmosphere at temperatures up to 580 °C. In comparison, ‘elemental’ carbon is combusted in an oxidizing atmosphere consisting of helium with oxygen at temperatures up to 840 °C. The carbon released from the sample is converted to carbon dioxide (CO2) by a heated manganese dioxide catalyst oven, and an NDIR detector quantifies the CO2. Seven modulated diode lasers operating at wavelengths from 405 to 980 nm measure the reflectance from and transmittance through the sample on the filter.
