Magee Scientific DRI Model 2015 Series 2 OC/EC Analyzer

Advanced Multi-Wavelength Thermal/Optical Carbon Analysis for Laboratory Precision

The DRI Model 2015 Series 2 defines the state-of-the-art in laboratory analysis of carbonaceous aerosols. Designed to quantify Organic Carbon (OC), Elemental Carbon (EC), and Total Carbon (TC) collected on quartz-fiber filters, this instrument employs a sophisticated thermal/optical method to ensure complete speciation. By utilizing a 7-wavelength optical system (405–980 nm) for both reflectance and transmittance, the Series 2 provides unparalleled depth of data—enabling the characterization of "Brown Carbon" (BrC) and correcting for pyrolysis charring with superior accuracy compared to single-wavelength legacy systems.

Engineered for high-throughput laboratories and national reference networks, this analyzer delivers protocol flexibility (IMPROVE_A, EUSAAR_2, NIOSH) while reducing operational costs through enhanced component durability and automated sample handling options.

Key Benefits

• Comprehensive Optical Characterization: Unlike standard analyzers that rely on a single laser, the Series 2 integrates seven modulated diode lasers spanning the UV to near-IR spectrum. This allows for precise determination of optical properties at specific wavelengths, critical for identifying biomass burning markers and brown carbon.

• Protocol Versatility & Compliance: The system comes pre-programmed with standard regulatory protocols—including IMPROVE_A, NIOSH 5040, and EUSAAR_2—and offers fully customizable temperature ramping profiles. This flexibility ensures compliance with varying regional standards (EPA, CEN) and research requirements.

• High-Throughput Automation: The optional 50-sample Autoloader transforms the workflow, allowing for 24+ hours of unattended operation. With an integrated cooling system and over-pressurized chamber, it protects sample integrity from contamination and volatile loss during the queue.

• Enhanced Reliability & Lower Opex: Re-engineered with a robust oxidation oven and improved electronics, the Series 2 reduces consumable usage and maintenance downtime compared to the legacy DRI Model 2001, offering a lower total cost of ownership for busy laboratories.

Technical Overview

The DRI Model 2015 Series 2 operates on the principle of thermal-optical analysis (TOA). A punch from a quartz filter is subjected to a stepped temperature ramp in an inert helium atmosphere (to volatilize Organic Carbon) followed by an oxidizing helium/oxygen atmosphere (to combust Elemental Carbon).

Advanced Optical Correction:

A critical challenge in OC/EC analysis is the charring of organic compounds during the inert heating phase, which mimics Elemental Carbon. The Series 2 continuously monitors the filter via Reflectance (TOR) and Transmittance (TOT) across all 7 wavelengths. This dual-optical monitoring allows the software to accurately define the "split point" where charring ends and native EC oxidation begins, correcting the final mass calculation for pyrolytic conversion.

System Integration:

• Detector: Non-Dispersive Infrared (NDIR) for CO₂ quantification.

• Sensitivity: Optional High Sensitivity (HS) module triples the sample area size, significantly lowering detection limits for pristine background samples.

• Coupling: Can be interfaced with a Photo-TOF-MS for molecular-level chemical speciation of the evolved gases.

Typical Use Cases

• National Air Quality Networks: Routine analysis of PM2.5 and PM10 filters to report compliance with air quality directives.

• Source Apportionment Studies: Differentiating between vehicle exhaust (fossil fuel) and wood smoke (biomass) using the optical properties of Brown Carbon.

• Occupational Health: Monitoring diesel particulate matter (DPM) exposure in mines, tunnels, and industrial facilities.

• Climate Research: Investigating the radiative forcing potential of aerosols by analyzing their light-absorbing properties at multiple wavelengths.

Why Choose This Analyzer?

The DRI Model 2015 Series 2 is the choice for researchers and regulators who refuse to compromise on data granularity. While basic analyzers provide a simple OC/EC split, the Series 2 reveals the optical fingerprint of the carbon. This capability is essential for modern atmospheric science, where understanding the difference between "warming" brown carbon and "black" carbon is key to climate policy. Backed by the scientific heritage of the Desert Research Institute (DRI) method, it offers a future-proof platform for carbonaceous aerosol research.

Brand & Specifications

• Measured Components:

  Organic Carbon (OC), Elemental Carbon (EC), Total Carbon (TC), Brown Carbon (BrC), Temperature-separated carbon fractions (OC1-OC4, EC1-EC3), Pyrolyzed Carbon (OP).

• Applications:

  Ambient air quality monitoring networks (PM2.5/PM10 speciation), Source apportionment (fossil vs. biomass), Climate change research, Occupational exposure monitoring (DPM).

• Certifications:

  Compliant with CEN/TR 16243 and EN 16909 (methodology); Supports IMPROVE_A, NIOSH 5040, EUSAAR_2 protocols; ACTRIS inter-laboratory comparison validated.

• Measurement Principle:

  Multi-wavelength Thermal/Optical Carbon Analysis (TOR/TOT) using 7 wavelengths (405, 445, 532, 635, 780, 808, 980 nm); NDIR detection of evolved CO₂.