Environmental Testing
QUARTZ FIBER FILTER
• Increased chemical and thermal
resistance• Prefired at 1000°C
for 2 hours to reduce organic
contamination• Available in
sheets and disks
PURE FIBROTIC PTFE FILTERS
• PTFE
filters neither adsorb acid
gases nor do they contribute any
trace metal contamination during
assay procedures• Superior
handling characteristics
compared to either glass or
quartz• Available in sheets and
disks
Composite Filter
• Composite Filter is specially
developed for the measurement of
dust concentration in the air•
PTFE coated: Naturally
hydrophobic and unaffected by
humidity
APPLICATIONS• Air pollution
analysis• Air dust analysisNote:
Cannot be used for liquid
filtration
Monitors for Microbial and
Contamination Analysis
Monitors
are suitable for field
collection and transportation of
samplesas well as analysis in
the laboratory. Samples
collected on the press-fit
membrane can then be cultured in
place or removed for further
analysis.ideal for field
sampling.
Cellulose Support Pads
cellulose support pads fit
standard 25 and 37 mm Monitor
type filter holders.
MCE (Mixed Cellulose Ester)
Membrane
• Standard 0.8 μm pore
size, white plain membrane fits
standard 25 and 37 mm
Monitor
type filter holders• High
quality: Cutting and packaging
operations are carried out under
clean roomconditions to keep
non-asbestos fiber contamination
to an absolute minimumNote:
Filters may be cleared using
either the acetone vapor method
or the
dimethylpthalatediethyloxalate
method.
Extraction Thimbles
High purity, seamless filters
with a characteristic thimble
shape. Applications include
analysis of fats,oils, grease,
pesticides, pollutants, other
organics and additives in
plastics and rubber
materials.
Cellulose Thimbles
•
Suitable for Soxhlet extractions
of organic components• Dust
sampling• Lipid content max.0.1% by
weight
Glass Fiber Thimbles
•
Borosilicate glass• High
temperature extractions or
dust monitoring (²500°C)•
Acid resistant (except
hydrofluoric)• Acid washed
for minimum trace metal
content
Silica Fiber
Thimbles
• Use up to 1000°C•
treated at 900°C for 4 hours
to stabilize the weight
prior to use• are tapered
for ease in loading into
stack samplers
PTFE Fiber and
PTFE/Silica Fiber Thimbles
•
Durable,
temperature-resistant•
Non-adsorptive with respect
to acid gases• PTFE is
inherently hydrophobic•
Little or no trace metal
contamination
