GLASS MICROFIBER FILTERSPrecision Filtration Solutions for Environmental & Industrial Applications
Description
The glass microfiber filter is meticulously designed to achieve outstanding particle capture efficiency and reliability in critical monitoring and research scenarios. Two configurations are provided to meet different operation requirements:
1️⃣ Standard Binder-Free Glass Microfiber Filter Papers
- Ultra-High Purity: >99.95% SiO₂composition ensures minimal analyte interference (metal leaching <0.01μg/cm²).
- Temperature Resistance: Operates stably up to 550℃ (short-term) / 450℃ (continuous), ideal for high-temperature emission monitoring.
- Low Ash Content: <0.005% residual ash after combustion, perfect for trace metal analysis (e.g., EPA Method 5).
2️⃣ Binder-Incorporated Glass Microfiber Filter Papers
- Enhanced Mechanical Strength: Polymeric binder improves handling durability without compromising pore structure.
- Hydrophobic Coating Option: Contact angle >140°, prevents liquid breakthrough in humid or corrosive environments.
- Consistent Flow Rate: Maintains 98% initial flow rate after 500+ hours of continuous use (ISO 4783 certified)
Technical specifications
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Glass microfiber filter papers with binder
Suitable for water quality and wastewater analysis, with fine particle retention capacity and high mechanical strength.
- Filter has sub-micron retention capability to capture very small particles
- Inorganic binder for added strength
- Withstands temperatures up to 500°C
- Can be used as prefilter paper for denser samples
- Commonly used for wastewater analysis
Submicron filter paper applications
This filter is used for:
- water pollution applications
- removing protein from difficult-to-filter beers
- determination of chlorophyll and phytoplankton residues
- determination of filterable substances and the residue on ignition (dry weight)
- analysis of aggressive media (e.g. acidic gases)
- scintillation measurements
- determination of the elemental iron content in the presence of iron oxides
- Grade GF 8: inorganic binder
This glass fiber filter is used in the filtration of coarse particles. Frequently used in:
• environmental analysis
• determination of PCB, DDE , DDT, furans and dioxins in the air
• pollution measurements in industrial, urban and populated areas, cement factories, iron and steel industry
• dust measurements in the workplace
• determination of the dust fraction in technical gases
• testing the effectiveness of dust collecting
- Air pollution filter papers for analyzing the retention of PCBs, DDE, DDT, furans and dioxins
- Measure pollution in industrial, urban and densely populated areas
- Measure dust in the workplace
- Measure dust levels in industrial gases
- Test the effectiveness of dust extraction
- Retention of coarse particles of approx. 3 μm
- Reinforced with inorganic binders
- Withstands temperatures up to 500°C
- Medium filtration speed
- Can be used as prefilter paper for denser samples
This filter with extreme mechanical stability and temperature resistance up to 180°C is used as a weighing aid for infrared weighing and as a roll filter in automatic air filtration units.
This filter is used as a membrane prefilter in applications such as:
• determination of crop protection agent residues by GC or HPLC
• cold sludge determination of beer
• soot separation before gas analyzers
• as roll filters in automatic air filtration units
Standard binder-free glass microfiber filter papers
This grade filter paper offers fine particle retention and high flow rate, as well as good loading capacity.
- Used for high-efficiency general purpose laboratory filtration, including water pollution monitoring of effluents, for filtration of water,
algae and bacteria cultures, food stuff analyses, protein filtration, and radioimmunoassay of weak ß emitters.
- Recommended for gravimetric determination of airborne particulates, stack sampling, and absorption methods of air pollution monitoring.
- Grade GF/A card-mounted filters are used in static sample and personal air sampler applications. These aerosol sampling
and particulate monitoring filters provide high flow rates and minimal sample interference.
- Three times thicker than GF/A with higher wet strength and significantly increased loading capacity.
- Combines fine particle retention with good flow rate. Particularly useful where liquid clarification or solids quantification is required for heavily-loaded, fine particulate
suspensions.
- Can be used as a finely retentive membrane prefilter. Used in LSC techniques where high loading capacity is required.
- Combines fine particle retention with good flow rate.
- The standard filter in many parts of the world for the collection of suspended solids in potable water and natural and industrial wastes.
- Fast and efficient clarification of aqueous liquids containing low to medium levels of fine particulates.
- Widely used for cell harvesting, liquid scintillation counting, and binding assays where more loading capacity is required.
Considerably faster in flow rate and overall filtration speed than cellulose filter papers of similar particle retention. The filter is thick and consequently exhibits a high loading capacity. Designed as a membrane prefilter and available in sizes to fit most holders.
- GF/D will provide good protection for finely retentive membranes.
- Can be used in combination with GF/B to provide very efficient graded prefilter protection for membranes.
This high-efficiency filter will retain fine particles down to 0.7 μm. Unlike membrane filters with a comparable retention value, it has a very rapid flow rate and an extremely high loading capacity.
Because of the tight specification of 0.6 μm—0.8 μm particle retention and pure borosilicate glass structure, GF/F is the material upon which the EPA Method TCLP 1311 for Toxicity Characteristic Leaching Procedure was developed.
Recommended for nucleic acid binding and purification. Very effective in filtering finely precipitated proteins, GF/F can be used in conjunction with GF/D as a prefilter for the successful clarification of extremely difficult biochemical solutions and fluids, and nucleic acids.
The fine particle retention of this popular grade is superior for its high retention efficiency at high flow rates and its high loading capacity. This is a smooth surface, high retention borosilicate glass microfiber filter, which has been pre-fired and withstands temperatures over 550°C. Grade 934-AH™ is used for a wide range of laboratory applications.
- Used for determining total suspended solids in water, removal of turbidity, and filtration of bacterial cultures.
- Recommended for water pollution monitoring, cell harvesting, liquid scintillation counting, and air pollution monitoring.
Ready-to-use (RTU) formats are available for Total Suspended Solid (TSS), Total Dissolved Solids (TDS) and Volatile Suspended Solids (VSS).
EPM 2000
EPM 2000 has been selected by the U.S. Environmental Protection Agency (EPA) for use in high volume air sampling equipment that collects atmospheric particulates and aerosols. It is manufactured from 100% pure borosilicate glass of special purity, and pre-fired to enable the detailed chemical analysis of trace pollutants with the minimum of interference or background
Technical specifications
Ordering information
