DPM Cassettes
Diesel Particulate Matter (DPM) Cassette For Elemental Carbon Analysis by NIOSH 5040
Sampling equipment that meets the requirements of NIOSH 5040 or MSHA specifications for sampling Diesel Particulate Matter (DPM)
The DPM Cassette
Other cassettes may meet NIOSH Method 5040 specifications for the collection of diesel particulate, but only the SKC DPM Cassette separates diesel particulate matter (DPM) from other respirable dust (such as coal dust) based on particle size. The precision-jeweled impactor and impaction substrate, loaded into a streamlined, single-use cassette, screens out and retains respirable particles > 1.0 µm aerodynamic diameter. Particles less than 1.0 µm are collected on a heat-treated low carbon quartz filter. Samples are analyzed for organic and elemental carbon content using a highly sensitive Evolved Gas Analysis (EGA) technique with thermal-optical analyzer as specified in NIOSH Method 5040.
- Collect submicron particles
- Integral precision-jeweled impactor screens out particles > 1.0 µm such as coal dust
- Heat-treated quartz filter collects submicron particles.
- Meets NIOSH Method 5040 specifications
- Provides optimum DPM collection efficiency
- Evaluated at 1.7 L/min in metal/non-metal mines and 2.0 L/min in coal mines; flow rates are used by MSHA
- Sample integrity assured
- Heat-treated quartz filters assure low carbon background
- Designed for single use
- Tamper-evident sealed
- Streamlined cassette design
Specifications
| The DPM Advantage | Collection of submicron diesel particles without interference of coal-source elemental carbon. Precision-jeweled impactor screens out interfering coal dust. |
| Low carbon background filters | assure accurate results. |
| Single-use cassettes | are tamper-evident sealed to ensure sample integrity. |
| Uses a standard personal constant flow pump. | Flow rates of 1.7 L/min and 2.0 L/min provide optimum collection. Use a standard constant flow sample pump such as the SKC AirChek® 2000 or Universal PCXR. |
| Meets specifications of NIOSH Method 5040 | for the analysis of elemental carbon (EC) to determine total carbon (organic and elemental) in a sample. Total carbon represents more than 80% of diesel particulate emissions. Compared to gravimetric methods, NIOSH 5040 is more sensitive and specific for EC. |
| The DPM Sampling Train | The SKC DPM Cassette is used with a sample pump capable of a flow rate of 1.7 or 2.0 L/min such as the AirChek 2000 or Universal XR Series. A respirable cyclone may be added to the train in sampling situations where carbonate or other larger particles are present that could clog the cassette impactor. SKC offers the GS-1 Single-inlet Cyclone for use with DPM Cassettes. |
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