DRI Model 2015
DRI Model 2015
The DRI-2015 was designed by the research team led 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 was licensed to Magee Scientific Corporation of California and its partner company Aerosol. The DRI-2015 provides the most advanced and complete analysis of carbonaceous aerosol particles collected from the atmosphere or directly from sources.
The DRI-2015 has been very extensively inter-compared against the DRI-2001 and other analyzers, to demonstrate complete consistency with previous measurements.
The DRI-2015 uses 7 lasers operating at wavelengths of 405, 445, 532, 635, 780, 808, and 980 nm to measure the intensity of light both reflected from the sample (R); and transmitted through the sample (T). This allows for analysis using both the ‘TOR’ and ‘TOT’ protocols simultaneously. The multi-wavelength analysis provides a determination of the “Brown Carbon” (BrC) component of the sample, and provides detailed data for source apportionment studies.
The DRI-2015 software provides full instrument control, data acquisition and display. It includes temperature programs for commonly-used protocols such as IMPROVE_A, EUSAAR, and NIOSH, 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 the system to reproduce any other thermal/optical method for characterizing additional properties of the carbonaceous aerosol.
- Air quality and climate change research
- Particulate Matter (PM) speciation trends networks
- PM source apportionment
- Carbonaceous material analysis
FEATURES AND IMPROVEMENTS
- Compatible with the IMPROVE_A carbon analysis protocol, used in the U.S. urban Chemical Speciation Network (CSN), the non-urban Interagency Monitoring of PROtected Visual Environments (IMPROVE) Network, and long-term networks in other countries.
- High-intensity light sources and perpendicular orientation of R and T measurements to maximize optical sensitivity.
- Nondispersive infrared (NDIR) CO2 detection eliminates the need for hydrogen gas and a methanator as required for a flame ionization detector (FID).
- Reduced helium gas consumption.
- Mass flow controllers interfaced to the computer system provide precise control of all reagent gases.
- LabVIEW-based software provides enhanced user interface and instrument control.
- Completely re-designed engineering provides improved access for maintenance and service.
- 0.05 to 750 μg carbon/cm2
Minimum Detection Limit (MDL)
- OC : 0.18±0.06 μg C/ cm2
- EC : 0.04±0.06 μg C/ cm2
- TC : 0.22±0.06 μg C/ cm2
- 405, 445, 532, 635, 780, 808, and 980 nm
- Ultra-high purity (UHP) helium (hydrocarbon free, >99.999% purity)
- 10% oxygen in UHP helium
- 5% methane in UHP helium
- Compressed air
Data Acquisition Interval
- 1 second
Environmental Operating Conditions
- Indoor laboratory environment:
- Temperature: 10 to 35 °C
- Relative Humidity: 0 to 90%, noncondensing
- Sample oven: programmable from 60 to 900 °C with maximum heating rate 250 °C/minute
- Oxidation oven: 900 °C
- Temperature accuracy: ±5 °C or 1%
- 100 to 240 VAC, 50/60 Hz, 1500 W maximum
Dimensions (H × W × D)
- 44 × 92 × 41 cm (17 × 36 × 16 inch)
- 50 kg
|Separation of Brown Carbon from Black Carbon for IMPROVE and CSN PM2.5 Samples||J. C. Chow et al.||JAWMA (in press, 2018)||2018|
|Optical Calibration and Equivalence of a Multi-Wavelength Thermal/Optical Carbon Analyzer||J. C. Chow et al.||AAQR 15, 1145-1159, (2015)||2015|
|Multi-wavelength optical measurement to enhance thermal/optical analysis for carbonaceous aerosol||L.-W.A. Chen et al.||AMT 8, 451-461, (2015)||2015|
*Copies available upon request