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Sample preparation / Filtration / SKC Filter Selection Guide

Air Monitoring Cassette Blanks

Air Monitoring Cassette Blanks
Diameter (mm) Type Material/Properties Qty. Cat. No.
 
 
25 2-piece Styrene, clear 50 225-2-25LF
100 225-2258
25 3-piece Styrene, clear 50 225-3-25LF
100 225-2259
25 Middle ring Styrene, clear, 1/2 inch height 50 225-304
For use with SKC Omega brand cassettes only
37 2-piece Styrene, clear 10 225-2LF
50 225-2050LF
250 225-2250
37 3-piece Styrene, clear 10 225-3LF
50 225-3050LF
250 225-3250
37 2-piece Styrene, opaque brown 50 225-4
37 3-piece Styrene, opaque brown 50 225-8451
25 Middle ring Styrene, clear, 1/2 inch height 50 225-300R
For use with SKC Omega brand cassettes only
Solvent-resistant* Air Monitoring Cassette Blanks
Compatible with most solvents*
Diameter (mm) Type Material/Properties Qty. Cat. No.
 
 
25 2-piece, goblet style Polypropylene, opaque white 50 225-8481
25 3-piece, goblet style Polypropylene, opaque white 50 225-8585
37 2-piece Polypropylene, opaque white 50 225-8483
37 3-piece Polypropylene, opaque white 10 225-45
37 3-piece Polypropylene, opaque white 50 225-45A
Conductive Air Monitoring Cassette Blanks
For reducing sample loss due to electrostatic effects; required for asbestos sampling
Diameter (mm) Type Material/Properties Qty. Cat. No.
25 3-piece, 2-inch middle cowl Polypropylene, conductive black 50 225-3-23
25 2-piece Polypropylene, conductive black 50 225-2257
25 3-piece 1/2-inch middle ring Polypropylene, conductive black, with ½-inch spacer ring (rather than 2-inch cowl) 50 225-329
37 3-piece Polypropylene, conductive black 50 225-309
37 2-piece Polypropylene, conductive black 50 225-308
47 2-piece Polypropylene, conductive black 16 225-8496
47 3-piece Polypropylene, conductive black 16 225-8497

SKC Filter Selection Guide

Material Abbr. Common Pore Sizes Main Properties Air Sampling Applications
Mixed Cellulose Ester MCE or MEC 0.45 µm
0.8 µm 
1.2 µm 
5.0 µm 		 Hydrophilic
Readily soluble for atomic absorption analysis
Readily rendered transparent for transmitted light microscopy
Dissolve and clear easily		 Metal dust analysis
Asbestos and man-made fibers
Polyvinyl Chloride
(Pure Homopolymer)
GLA-5000		 PVC or PH-PVC 0.5 µm
0.8 µm 
5.0 µm 		 Hydrophobic
Non-oxidizing surface
Silica-free
Low ash
Low tare weight for gravimetric analysis		 Gravimetric analysis
Hexavalent chromium
Polytetrafluoroethylene PTFE 0.5 µm
1.0 µm 
2.0 µm 
5.0 µm 		 Hydrophobic
Inert to solvents, acids, and bases
Autoclavable		 Alkaline dusts
Polynuclear aromatics
Pesticides
Isocyanates
Polycarbonate PC 0.3 µm
0.4 µm 
0.8 µm 		 Hydrophobic
Microscopically smooth surface
Straight-through pores
Extremely thin (10 to 20 µm) and transparent
Autoclavable		 Scanning electron microscopy
Asbestos fibers
Silver AG 0.45 µm
0.8 µm 		 Wide solvent compatibility
Higher temperature tolerance
Autoclavable
Uniform porosity and thickness		 Bromine
Asbestos by TEM
Silica by x-ray diffraction
Glass Fiber GF or FG Liquid Nominal Rating 1.0 µm Partially hydrophobic
Higher temperature tolerance
Autoclavable
High particulate retention		 Pesticides
Ethylene glycol 
Coarse gravimetric
Isocyanates
Quartz QZ Liquid Nominal Rating 1.2 µm Same as fiber glass
Autoclavable
Low level metals content
High temperature 300 C		 Gases
Aerosols
PM10
Diesel particulates
Cellulose CEL Nominal Autoclavable
Uniform strength
Ashless (Type 40)		 AA
HPLC

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