Polycarbonate Membrane Filters
Polycarbonate Membrane Filters are ideal for microscopy.
- Smooth surface for superior particle capture
- Thin, transparent, and non-staining
- Ideal for light and electron microscopy
- Exceptional background for sample observations
- Superior chemical resistance, thermal stability, and strength
- Exceptionally low tare weight
- Biologically inert
- Maximum operating temperature is 140°C (284°F)
Gelatin Filters
Ideal for maintaining the viability of collected microorganisms, the Gelatin Filters provide unequalled bacteria retention levels for quantitative analysis. The high moisture content helps to maintain microorganism viability for sampling periods up to 30 minutes. The filters dissolve easily when placed on agar, allowing for a gentle transition from sample medium to growth medium. For maximum culturability and superior collection of inhalable-size bioaerosols, combine 25 mm gelatin filters with the SKC Button Sampler.
- Absolute retention rate:
- 99.9995% for Bacillus subtilis var. niger spores ‡
- 99.94% for T3 phages (coliphages) ‡
- 99.9% for T1 phages (coliphages) ‡
- High moisture content
- Maintain microbe viability for short sampling periods
- Completely water soluble
- Dissolve easily when placed on agar
- Prerequisite for virus sampling
- Pre-sterilised by gamma irradiation
- Ideal for monitoring in pharmaceutical plants
- Can be used to monitor in areas where disinfectants or antibiotics are present
‡ At inlet velocities of 0.25 m/s, 0.3 m/s (80 %RH), and 0.3 m/s (50 %RH) respectively
Quartz Depth Filters
Quartz depth filters are used for sampling for elemental/organic carbon, Diesel Particulate Matter (DPM) and trace-level contaminants.
- Heat treated to reduce trace organics
- Binder free for maximum purity
- Low metal background
- Will withstand temperatures up to 1000°C (1832°F)
Filter Type
- Type R-100 Filters meet specific requirements set forth by NIOSH - 99.97% retention efficiency for 0.3 µm diocrylphthalate (DOP) particles up to a 200 mg filter loading.
- Tissuquartz™ Filters have a typical retention efficiency of 99.90% for 0.3 µm DOP particles at 32 L/min per 100 cm2 filter media.
Cellulose Depth Filters
- Ideal for gravimetric sampling, collection of organic/inorganic precipitates, and AA (Atomic absoprtion) and HPLC (High-Performance Liquid Chromatography) methods requiring an ashless filter
- 100% pure, ashless type 40 quantitative cellulose fibre
- Autoclavable
Diameter (mm) | Support Pad included † | Notes | Pack Size | Part Number |
37 | No | Cellulose, ashless, equivalent to Whatman Type 40 | 500 | 225-18A |
† Filter supports available
Silver Membrane Filters
SKC silver membrane filters are made of 99.97% pure metallic silver in a controlled environment. The many desirable properties of silver membranes make them suitable for a wide range of applications.
The orientation of a silver membrane filter is important. Each side of the silver membrane filter is different. One side appears shinier than the other. Use the shinier side for scanning electron microscopy (SEM) and the duller of the two sides for all other filtration applications and analytical work, including X-ray diffraction. A smooth surface provides for superior collection of particulates with a typical aerosol retention of 99.99% (0.3 µm DOP at 3 L/min through 10 cm2)
- Chemically inert and resistant to high temperatures, up to 500°C (1022°F)
- Sample aggressive contaminants
- Autoclave repeatedly without loss of performance
- Uniform porosity and thickness
- Ideal for x-ray diffraction and other analyses
- NIOSH methods for x-ray diffraction analysis of crystalline silica, lead sulphide, boron carbide, and chrysolite asbestos
- Organic materials by a variety of analytical methods
- Smooth surface for high surface capture of particles and easy observation
- Environmentally friendly — recyclable
- Can be cleaned and reused
Silver Membrane Filter Applications
- Collection and analysis of coke oven emissions
- Collection and analysis of polyaromatic hydrocarbons
- Analysis of airborne silica
- Collection and analysis of airborne asbestos fibres by X-ray diffraction
- Collection and analysis of carbon and carbon black
- Collection and analysis of fly ash directly from smoke stacks
- Analysis of biological specimens by scanning electron microscopy, especially when being collected from suspension
- Dimensional preservation of specimens during freeze-drying
- Filtration of alcoholic beverages
- High temperature processing of viscous materials
- Performing mild chemical digestion directly at filter surface
- High temperature stack sampling
- High temperature sterilisation procedures
- Filtration involving organic solvents