The first question many ask is, what makes a glass microfiber filter the right choice for high-volume applications?
The EPM2000 glass microfiber filters are specifically designed for ambient air monitoring, especially for total suspended particulate matter (TSP)[^1]. Their high purity ensures compliance with regulations while maintaining sample integrity.
When selecting the right filter, many people feel lost. There are numerous options available, and it can be overwhelming. However, let me tell you about the EPM2000 filters. They are a trusted choice for many professionals in environmental monitoring.
What are the key features of the EPM2000 filters?
The EPM2000 filters are designed with specific technical specifications that make them ideal for various applications.
These filters measure 8" x 10" (203.2 x 254 mm) and are 450 µm thick. They offer a nominal basis weight of 85 g/m², allowing for an air flow rate of 5.6 s/100 ml/in². With a maximum operating temperature of 550°C[^2], they are suitable for many demanding environments.
The materials used in these filters are also noteworthy. The borosilicate glass construction is binder-free. This ensures that no additional materials interfere with sample collection. The purity of these filters allows for reliable collection of total suspended particulate matter.
Technical Specifications
| Feature | Specification |
|---|---|
| Dimensions | 8" x 10" (203.2 x 254 mm) |
| Nominal Thickness | 450 µm |
| Nominal Basis Weight | 85 g/m² |
| Air Flow Rate | 5.6 s/100 ml/in² |
| Maximum Operating Temperature | 550°C |
| Material | Borosilicate glass |
| Packaging | 100 filters per box |
The EPM2000 filters are compliant with the requirements outlined in 40 CFR Part 50, Appendix B[^3]. This means they meet the standards for measuring TSP in ambient air quality. Many environmental monitoring professionals, including those in the food and beverage industry, pharmaceutical, and cosmestic sectors, utilize these filters in their work.
How do EPM2000 filters ensure compliance?
To ensure compliance, it's essential to follow EPA protocols during sampling. EPM2000 filters come pre-numbered, allowing for easy tracking and identification of samples.
After moisture equilibration, filters should be weighed before and after use to determine net weight gain[^4]. This process is crucial to avoid errors due to loss of fibers or particles. Proper storage of exposed filters is also important to protect collected particulate matter.
Handling these filters requires care. They must be stored correctly, folded to protect the collected materials[^5]. This attention to detail helps maintain the integrity of your samples throughout the testing process.
Why are EPM2000 filters preferred by professionals?
Many professionals in environmental monitoring prefer EPM2000 filters for several reasons.
- High Purity: The binder-free construction contributes to their high purity[^6], making them ideal for critical applications.
- Compatibility: EPM2000 filters work well with all Tisch Environmental high-volume TSP samplers and various other models.
- Exceptional Chemical Resistance: The borosilicate glass allows these filters to withstand harsh chemicals, ensuring reliability in different environments.
These features contribute to a higher success rate in experiments and monitoring processes[^7].
Conclusion
In summary, EPM2000 filters are an excellent choice for high-volume air sampling. They offer compliance, high purity, and reliable performance. If you're looking for a dependable filter, EPM2000 is definitely worth considering.
[^1]: "Review of Filters for Air Sampling and Chemical Analysis in ...", https://pmc.ncbi.nlm.nih.gov/articles/PMC10174218/. Product documentation identifies EPM2000 glass microfiber filters as filters for ambient-air particulate sampling, including total suspended particulate matter applications. Evidence role: general_support; source type: other. Supports: EPM2000 glass microfiber filters are specifically designed for ambient air monitoring, especially for TSP.. Scope note: This would support the product's stated intended use but would not independently verify field performance.
[^2]: "Filtration Characteristics of Glass Fiber Filter at Elevated ...", https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=91015XO6.TXT. A product specification sheet for EPM2000 filters lists the maximum operating temperature and related physical specifications for the filter medium. Evidence role: general_support; source type: other. Supports: EPM2000 filters have a maximum operating temperature of 550°C.. Scope note: A product specification supports the stated rating but does not demonstrate performance under all sampling conditions at that temperature.
[^3]: "Appendix B to Part 50, Title 40", https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-50/appendix-Appendix%20B%20to%20Part%2050. 40 CFR Part 50, Appendix B describes the EPA reference method for measuring suspended particulate matter in ambient air using a high-volume sampler and specified filter-handling procedures. Evidence role: case_reference; source type: government. Supports: EPM2000 filters are compliant with the requirements outlined in 40 CFR Part 50, Appendix B.. Scope note: The regulation establishes method requirements; a separate product certificate or datasheet is needed to prove that a particular EPM2000 filter batch complies.
[^4]: "Appendix B to Part 50, Title 40", https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-50/appendix-Appendix%20B%20to%20Part%2050. EPA's high-volume reference method specifies conditioning filters under controlled humidity and temperature and weighing them before and after sampling to determine the mass of collected particulate matter. Evidence role: mechanism; source type: government. Supports: Filters should be moisture-equilibrated and weighed before and after use to determine net weight gain.. Scope note: The source supports the general TSP gravimetric procedure rather than any unique feature of EPM2000 filters.
[^5]: "Appendix B to Part 50, Title 40", https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-50/appendix-Appendix%20B%20to%20Part%2050. EPA particulate-sampling procedures describe handling exposed filters to prevent loss or contamination of collected material during transport and storage. Evidence role: mechanism; source type: government. Supports: Exposed filters must be handled or folded in a way that protects collected particulate matter.. Scope note: The source may describe protective handling generally; it may not prescribe the exact folding practice for every filter type or sampler configuration.
[^6]: "Impact of Extractables/Leachables from Filter Materials on ...", https://pubmed.ncbi.nlm.nih.gov/36002610/. Technical literature on glass fiber filters notes that binder-free media reduce the introduction of organic binders or additives that could contribute extractables or interfere with gravimetric or chemical analyses. Evidence role: mechanism; source type: paper. Supports: Binder-free construction contributes to the high purity of glass microfiber filters.. Scope note: This supports the rationale for binder-free media generally, not a measured purity value for EPM2000 filters.
[^7]: "[PDF] Quality Assurance Guidance 2.12 - Monitoring PM2.5 In Ambient Air ...", https://www.epa.gov/sites/default/files/2021-03/documents/p100oi8x.pdf. Air-monitoring quality-assurance guidance emphasizes that appropriate filter media, contamination control, sampler compatibility, and documented handling procedures are important for producing valid particulate-matter measurements. Evidence role: expert_consensus; source type: government. Supports: Filter purity, sampler compatibility, chemical resistance, and proper handling can improve reliability in monitoring processes.. Scope note: Such guidance supports the general relationship between proper materials/procedures and data quality, but it does not quantify a higher success rate for EPM2000 filters specifically.
