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| Cellulose
Support Pads |
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Cellulose Support Pad, 25mm Disk
Cellulose Support Pad 37mm Disk |
Details |
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25mm |
37mm |
| Product # |
FSP25 |
FSP37 |
| U/M |
100/Pack |
100/Pack |
| Stock Status |
Normally Ships within 24 hours |
Normally Ships within 24 hours |
| Price: |
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| Porours
Plastic Support Pads |
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Porous Plastic Support Pad, 25mm
Disk
Porous Plastic Support Pad, 37mm Disk |
Details |
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25mm |
37mm |
| Product # |
PFSP25 |
PFSP37 |
| U/M |
100/Pack |
100/Pack |
| Stock Status |
Normally Ships within 24 hours |
Normally Ships within 24 hours |
| Price: |
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| Glass
Fiber Filters |
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Glass Fiber Filters, 25mm
Glass Fiber Filters, 37mm
Glass Fiber Filters, 8" x 10" sheets
- Superior grade glass fiber filters
for a variety of air sampling methods
- For testing dissolved and suspended
solids in wastewater and gravimetric analysis
of air pollutants.
- High flow rates, wet strength,
and high dirt (solids) holding capacities.
- Type A/E meets the requirements
for suspended solids testing, as described in
Standard Methods for the Examination of Water
and Wastewater, current edition.
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Details |
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25mm |
37mm |
8" x
10" sheets |
| Product # |
FGF25 |
FGF37 |
FGF8X10 |
| U/M |
500/pack |
500/pack |
100/pack |
| Stock Status |
Normally Ships within
24 hours |
| Price: |
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| Mixed
Cellulose Ester (MCE) Filter Membrane Disks, 0.45µ pore
size |
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Mixed Cellulose Ester (MCE) Filter
Membrane Disks, 0.45µ
pore size, 25mm diameter
Mixed Cellulose Ester (MCE) Filter
Membrane Disks, 0.45µ
pore size, 37mm diameter
Mixed Cellulose Ester (MCE) Filter
Membrane Disks, 0.45µ
pore size, 37mm diameter gridded with black grid lines
Mixed Cellulose Ester (MCE) Filter
Membrane Disks, 0.45µ
pore size, 47mm diameter
- Economical membrane for air monitoring
applications
- Suitable for air monitoring applications.
- Dissolves completely using standard
digestion procedures.
- Meets NIOSH requirements for airborne
metals and asbestos/fibers monitoring.
- Clears completely, possesses low
artifacts, and offers minimal interference in
fiber counting.
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Details |
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0.45µ X
25mm |
0.45µ X
37mm |
0.45µ X
37mm gridded |
0.45µ X
47mm |
| Product # |
FMCE425 |
FMCE4537 |
FGMCE4537 |
FMCE4547 |
| Shipping Weight |
0.50 lbs |
0.50 lbs |
0.50 lbs |
0.50 lbs |
| U/M |
100/Pack |
100/Pack |
100/Pack |
100/Pack |
| Stock Status |
Normally Ships within
24 hours |
| Price: |
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| Mixed
Cellulose Ester (MCE) Filter Membrane Disks, 0.8µ pore
size |
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Mixed Cellulose Ester (MCE) Filter
Membrane Disks, 0.8µ
pore size, 25mm diameter
Mixed Cellulose Ester (MCE) Filter
Membrane Disks, 0.8µ
pore size, 25mm diameter gridded with black grid
lines
Mixed Cellulose Ester (MCE) Filter
Membrane Disks, 0.8µ
pore size, 37mm diameter
Mixed Cellulose Ester (MCE) Filter
Membrane Disks, 0.8µ
pore size, 37mm diameter gridded with black grid lines
Mixed Cellulose Ester (MCE) Filter
Membrane Disks, 0.8µ
pore size, 47mm diameter
- Economical membrane for air monitoring
applications
- Suitable for air monitoring applications.
- Dissolves completely using standard
digestion procedures.
- Meets NIOSH requirements for airborne
metals and asbestos/fibers monitoring.
- Clears completely, possesses low
artifacts, and offers minimal interference in
fiber counting.
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Details |
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0.8µ X,
25mm |
0.8µ X
25mm gridded |
0.8µ X
37mm |
0.8µ X
37mm gridded |
0.8µ X
47mm |
| Product # |
FMCE825 |
FGMCE825 |
FMCE837 |
FGMCE837 |
FMCE847 |
| Shipping Weight |
0.50 lbs |
0.50 lbs |
0.50 lbs |
0.50 lbs |
0.50 lbs |
| U/M |
100/Pack |
100/Pack |
100/Pack |
100/Pack |
100/Pack |
| Stock Status |
Normally Ships within
24 hours |
| Price: |
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| Polycarbonate
Membrane Filter, 0.45µ and 0.8µ |
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Polycarbonate Membrane Filter, 0.45µ,
25mm
Polycarbonate Membrane Filter, 0.45µ, 37mm
Polycarbonate Membrane Filter, 0.8µ, 37mm
- Smooth glass-like surface with
cylindrical pores for maximum particulate capture
- Suitable for air monitoring
- Lowest, non-specific binding membrane
- Precise pore sizes and pore distribution
for absolute filtration and separation
- Non-staining, providing an exceptional
background for sample observations.
- Very low extractables
- PCTE membranes pass all USP Class
VI tests
- Biologically inert.
- Optically transparent in most
pore sizes.
- Excellent chemical resistance
and thermal stability.
- Capture of samples on a flat,
smooth, glass-like surface, with even distribution
in one plane.
- Exceptionally low tare weights,
non-hygroscopic, and low trace element level.
- Superior strength
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Details |
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0.45µ,
25mm |
0.45µ,
37mm |
0.8µ,
37mm |
| Product # |
FPC4525 |
FPC4537 |
FPC837 |
| U/M |
100/pack |
100/pack |
100/pack |
| Stock Status |
Normally Ships within 24 hours |
| Price: |
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| PVC
Membrane Filter |
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PVC Membrane Filter, 0.8µ,
25mm
PVC Membrane Filter, 0.8µ, 37mm
PVC Membrane Filter, 5.0µ,
27mm
PVC Membrane Filter, 5.0µ ,37mm
PVC Membrane Filter, 5.0µ, 47mm
- Excellent membrane choice for
sampling airborne metals, silica, and dust.
- Pure homopolymer PVC
- Inherently low ash membrane ideally
suited for multiple NIOSH analytical methods
- Assure gravimetric stability.
Low moisture pick-up and low tare weight.
- Low ash. Provides interference-free
silica determinations.
- Meets NIOSH and OSHA requirements.
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Details |
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0.8µ X
25mm |
0.8µ X
37mm |
5.0µ X
25mm |
5.0µ X
37mm |
5.0µ X
47 |
| Product # |
FPVC825 |
FPVC837 |
FPVC525 |
FPVC537 |
FPVC547 |
| U/M |
100/pack |
100/pack |
100/pack |
100/pack |
100/pack |
| Stock Status |
Normally Ships within
24 hours |
| Price: |
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| Silver
Membrane Filters |
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Silver Membrane Filters, 0.45µ,
25mm
Silver Membrane Filters, 0.8µ, 37mm
- 99.97% pure silver
- High temperature resistance
- High chemical resistance
- Economical - can be cleaned & reused
- Smooth surface for particle capture
and easy observation
Silver membranes are composed entirely of pure metallic
silver. They combine excellent chemical resistance
and high temperature characteristics with an absolute
retention range from 0.2 µm to 5 µm.
Although silver membranes are used in a large number
and variety of applications, their unique chemical
and thermal stability is especially valuable for those
applications involving aggressive fluids and/or high
temperatures. They are ideal collection media for analysis
of crystalline silica by X-ray diffraction and for
analysis of organic materials by other instrumentation
techniques, such as the analysis of polyaromatic hydrocarbons
(PAH).
Typical Applications
The smooth surface, surface capture and particle retention
characteristics of the silver membrane make it especially
effective for the collection and identification of
many types of airborne contaminants as well as those
found in all types of critical liquid systems. Silver
membranes are frequently referenced in the "NIOSH Manual
of Analytical Methods." Representative applications
include:
- Collection and analysis of coke
oven emissions, where the silver membrane is
used directly to collect coal tar pitch volatiles;
(See Bibliography and NIOSH Manual of Analytical
Methods.)
- Collection and analysis of polyaromatic
hydrocarbons using microanalysis techniques on
the gases evaporated from the membrane.
- Analysis of airborne silica in
foundries, glass plants, quarries, mines, ceramic
manufacturing, etc. requires collection of an
air sample on a polymeric membrane, then transfer
of the sample to a silver membrane for X-ray
diffraction; (See Bibliography and OSHA).
- Collection and analysis of airborne
asbestos fibers by X-ray diffraction.
- Collection and analysis of carbon
and carbon black.
- Collection and analysis of fly
ash directly from smoke stacks where high temperature
stability of the membrane is required.
Notes
In the use of the silver membrane, orientation of the
membrane can be important. There is a distinct difference
in surface characteristics of the silver membrane,
with one side appearing shinier than the other. For
scanning electron microscopy, use the shinier side.
For all other filtration applications and analytical
work, including X-ray diffraction, the duller of the
two sides should be used.
Chemical and Thermal Properties
Silver membranes have the chemical inertness and high
thermal stability of pure silver. They are resistant
to alcohol's, fuels and hydrocarbons, natural and synthetic
oils, alkalis, cryogenics, photoresists, ethers, propellants,
oxidizers, halogenated hydrocarbons, esters, and most
organics and acids. Under normal conditions, the silver
membrane is attacked only by cyanide solutions and
nitric and sulfuric acids.
Silver membranes provide excellent filtration performance
at temperatures from cryogenic up to 1022°F (550°C).
They may be repeatedly autoclaved and can be sterilized
with steam or hot air.
High Strength
In the manufacturing of the silver membrane, the size
and orientation of the silver particles are closely
controlled and uniformly deposited in sheet form. The
points of contact between the silver particles are
then molecular bonded into a homogeneous material that
resists pore collapse even under conditions of high
temperature and pressure. They can be used in low intensity
ultrasonic baths without fear of loss of integrity.
Nominal Retention
The careful control of the manufacturing process yields
unusually precise pore size and uniformity. Performance
tests indicate that nominal particle retention is achieved
as the result of simple mechanical sieving by the filter
structure. Thus, particle retention by the silver membrane
is independent of random electrostatic charges or other
extraneous, unpredictable molecular forces.
The surface of the silver membrane is flat and smooth
which allows surface capture. There is minimum background
interference from the silver when using X-ray diffraction.
No Fiber Release - No Media Migration
Conventional tortuous pore membranes and other filters
often shed fibers or parts of the filter material itself.
With changing conditions of flow and pressure drop,
pores may change in size which allow previously filtered
contaminants to migrate through the filter medium and
to contaminate the filtrate. In the case of silver
membranes, there are no fibers, and because the silver
membrane is a strong uniform porous monolithic structure
where the silver particles are molecularly bonded to
each other, there is no media migration.
Shelf Life
The shelf life of silver membranes is indefinite when
kept in sealed packages. However, since the silver
membrane is pure silver, it can become tarnished when
exposed to some chemicals in the air. This is a cosmetic
imperfection and the filtration properties are not
affected in any way.
The most common tarnishing compounds will cause the
membrane to turn black in the case of Ag2S and dark
brown in the case of AgCl. AgCl is simple to remove,
requiring only a rinse with an ammonia solution. Ag2S
is very stable, and is difficult to remove from the
membrane without altering the structure. Thus, it is
important that silver membranes be kept in a sealed
package.
These compounds should not be confused with the natural
grayish white appearance of the silver membrane filter
surface. This appearance is due to the microporous
structure of the membrane, which reflects light in
a different way than polished silver. |
Details |
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0.45µ,
25mm |
0.8µ,
37mm |
| Product # |
FS2545 |
FS378 |
| U/M |
50/pack |
25/pack |
| Stock Status |
Normally Ships within 24 hours |
| Price: |
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| PTFE
Filter Membrane |
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PTFE Filter Membrane, 0.5µ,
25mm, Zefluor (with PTFE support layer).
PTFE Filter Membrane, 0.45µ, 37mm, TF (with
PP support layer).
PTFE Filter Membrane, 1.0µ, 37mm, TF (with
PP support layer).
PTFE Filter Membrane, 2.0µ,
37mm, Zefluor (with PTFE support layer).
PTFE Filter Membrane, 5.0µ, 37mm, Zylon
unlaminated.
- For air monitoring and sampling
in aggressive environments.
- Strong, chemically resistant membranes
for air monitoring and sampling in aggressive
environments
- Low chemical background permits
highly sensitive, interference-free determinations.
- Ensures accurate gravimetric determinations
with low tare mass.
- Meets NIOSH specifications.
- Ideal for filtration of gas and/or
organic solvents.
|
Details |
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0.5µ,
25mm, Zefluor |
0.45µ,
37mm, TF |
1.0µ,
37mm, TF |
2.0µ,
37mm, Zefluor |
5.0µ,
37mm, Zylon |
| Product # |
FPTPT525 |
FPTP4537 |
FPTP137 |
FPTPT237 |
FPTU537 |
| Shipping Weight |
0.50 lbs |
0.50 lbs |
0.50 lbs |
0.50 lbs |
0.50 lbs |
| U/M |
100/Pack |
100/Pack |
100/Pack |
50/Pack |
50/Pack |
| Stock Status |
Normally Ships within 24 hours |
| Price: |
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