IOM Personal Sampler 225-70A Operating Instructions 37372 PDF

IOM Personal Sampler 225-70A Operating Instructions 37372 PDF
Operating Instructions
863 Valley View Road, Eighty Four, PA 15330 USA
Tel: 724-941-9701 Fax: 724-941-1369 e-mail: [email protected]
IOM Personal Samplers
Stainless steel IOM
Conductive plastic IOM
Description
The patented* IOM Sampler is a sampling head that houses a reusable two-part
filter cassette with specified 25-mm filter for the collection of inhalable airborne
particles. The filter and cassette assembly are pre and post-weighed as a single unit
for gravimetric analysis. The IOM Sampler and cassette is available in conductive
plastic or stainless steel. The stainless steel model is ideal for sampling vapor-phase
isocyanates followed by chemical analysis. The IOM Sampler meets the following
U.S. and international standards:
•
•
•
•
•
•
ACGIH sampling criteria for inhalable particulate mass
NIOSH Method 5700 for formaldehyde on dust
Australian standard for inhalable particulate
Preferred sampler for HSE Method MDHS 14/3
Complies with MDHS 25/3 for organic isocyanates (with stainless steel model)
Complies with MDHS 6 for lead (with accessory single-hole head)
The sampler is supplied with a cassette cover and cassette transport clip to prevent
contamination during transport.
* U.S. Patent No. 4,675,034
Performance Profile
Flow Rate:
50% Cut-point:
Material:
Max. Temperature
for Autoclaving:
Filters:
Weight: (plastic
model with cassette)
Dimensions:
2 L/min (personal sampling)
100 μm at 2 L/min inhalable fraction
Molded autoclavable conductive plastic or stainless steel
Plastic IOM: 104 F (40 C)
Stainless steel IOM: 212 F (100 C)
25-mm membrane or fibrous filter
< 2 oz (55 gm)
3.3 x 1.1 in (8.5 x 2.8 cm)
Preparation Guidelines
Handling
Wear powder-free gloves when handling cassettes and use forceps when working
with filters to prevent the transfer of moisture, dust, or other contaminants onto
the sampling media.
Housing
body
Cover
Collar clip
Cassette
Cassette
bottom
Front
top
Filter
O-ring C
plate O-ring A O-ring B
Outlet
Figure 1. Conductive plastic IOM Sampler and
cassette - Cat. No. 225-70A
Housing
body
Cover
Front
plate
Cassette
top
O-ring A O-ring B
Filter
Dust cap
Collar clip
Cassette
bottom
Outlet
Figure 2. Stainless steel IOM Sampler and
cassette - Cat. No. 225-76A
Dust cap
Caution: Wear powder-free gloves when handling cassettes and use
forceps when working with filters.
2
O-ring Placement
O-ring A
O-ring B
Proper O-ring placement in
IOM front plate, plastic and
stainless steel models
O-ring C
Proper O-ring placement in housing
body, plastic model only
Figure 2A. O-ring placement
Cleaning Sampler
1. Disassemble the IOM Sampler (Figures 1, 2, and 2A).
2. Place parts in an ultrasonic cleaner with water and a wetting agent such as
a mild soap. IOM components may also be cleaned with a solvent such as
isopropyl alcohol. O-rings should be cleaned separately using water only.
Caution: Do not use CFC-based substances to clean the plastic IOM.
Do not use solvents on O-rings.
Warning: When using solvents, protect against splashes to the eye,
vapor inhalation, and vapor ignition.
3. Clean the components using a clean lint-free paper, cloth, or soft brush. Allow
components to dry completely.
Note: IOM samplers and cassettes may be autoclaved. See Performance Profile
on page 2 for maximum temperatures.
Loading a Filter into the IOM Cassette
1. Use gentle pressure to separate the two halves
of the cassette (Figure 3).
2. Place a filter into the cassette bottom (on the
support grid). Snap the cassette top into the
cassette bottom, ensuring a tight fit.
Cassette
top
Filter
Cassette
bottom
Figure 3.
Exploded cassette
3
Calibration
Hinged
bracket
Calibration Adapter Setup (Figure 4)
1. Push an IOM Sampler loaded with a representative cassette and filter through the
hinged bracket and place inlet against the
foam ring.
2. Clamp IOM in place with plastic clamping
screw until foam ring compresses by 1 mm.
Ensure IOM inlet is centered.
3. Screw supplied hose barb into threaded hole
in calibration adapter inlet.
4. Use a length of flexible tubing to connect
hose barb to calibrator outlet.
5. Remove sampler dust cap from outlet.
Connect IOM outlet to the inlet of a sample
pump.
Plastic
clamping
screw
Foam ring
Insert IOM here,
inlet side down
Adapter
inlet
Hose barb
Figure 4. IOM Calibration Adapter
Calibrating Pump Flow Rate
Calibrate pump flow rate using the IOM Calibration Adapter accessory and an
IOM sampler with a representative loaded cassette installed in line.
1. Insert IOM with loaded filter cassette into the calibration adapter (see
Calibration Adapter Setup above).
2. Adjust pump flow rate to 2 L/min. See calibrator and sample pump operating
instructions for additional information.
3. Disconnect IOM from pump and calibrator and remove representative
cassette. Set aside for flow rate verification after sampling.
Filter and Cassette Preparation – Pre-sampling
General Weighing Guidelines
• Plastic cassette with filter should be equilibrated overnight in a balance
room under controlled humidity conditions and weighed. Maintain a stable
humidity level in the balance room. Stainless steel cassette with filter may
be desiccated.
• Pre and post-weigh filter and cassette as a single unit. Before pre and postweighing, wipe the external surface with a clean lint-free paper, cloth, or soft
brush.
• Field blanks can be used to correct weights when using plastic cassettes at
low filter loadings. See Sample Blanks on page 7.
• The IOM cassette assembled with filter or the filter alone should be
weighed on a five-figure balance. Allow the cassette three and a half minutes to stabilize before taking a reading. The same balance should be used
for both pre and post-weighing procedures.
4
Pre-weighing for Gravimetric Sampling
1. Equilibrate cassette and filter as indicated in General
Weighing Guidelines above.
2. Wipe the external surface of a loaded IOM cassette with a
clean lint-free paper, cloth, or soft brush.
3. Pre-weigh the IOM cassette loaded with a filter as a single
unit on a five-figure balance (Figure 5).
4. Note the result and reference it with a letter or number to
the cassette or the complete IOM Sampler.
Note: The cassette cover (Figure 6) can be included in
pre and post-weighing as part of the complete cassette
if required, but must be referenced to the cassette used.
Figure 5. Weigh
cassette with filter
on a five-figure
balance.
Loading Filter into Cassette for Chemical Sampling
(Use the stainless steel IOM Sampler and cassette for this application.)
1. Select appropriate coated filter for the target compound.
2. Use gentle pressure to separate the two halves of the stainless steel cassette
(Figure 3 on page 3).
3. In a clean environment, wearing powder-free gloves and using forceps, place
filter in stainless steel cassette bottom (on the support grid). Snap the stainless
steel cassette top into the cassette bottom, ensuring a tight fit.
Transporting Loaded Cassettes
If not ready to sample immediately
or if transporting the pre-weighed
loaded cassette to a sampling location,
place the cassette with cover into the
transport clip. Ensure that the cassette
cover is in place. An alternative is to
insert the cassette into an IOM body
and place the cover on the cassette for
transport (Figure 6).
Cover
Front
plate
Cassette
assembled
with filter
Figure 6. Load pre-weighed
cassette into a transport clip or
an IOM body; include cover.
5
Housing
body
Sampling
Caution: Wear powder-free gloves when handling cassettes.
1. Remove a loaded cassette from its
transport clip and remove the cassette
cover. Ensure the O-rings are fitted
correctly inside the sampler housing
body. Insert the cassette into the clean
IOM Sampler body. Screw on the front
plate tightly to provide a good seal
Figure 7. Insert loaded cassette in
(Figure 7).
sampler body and screw on front plate.
2. Clip onto a worker’s clothing in the
breathing zone (Figure 8).
3. Remove sampler dust cap from outlet. Using tubing,
connect outlet of the IOM Sampler to the inlet of a
sample pump calibrated to 2 L/min (Figure 8).
4. Sample for the time specified in the method.
5. After sampling, remove the cassette from the
sampler body, place the cover on the cassette, and
wipe the external surface of the cassette with a clean
lint-free paper, cloth, or soft brush. Place cassette
with cover into the transport clip (Figure 9). See
Transporting Samples to a Laboratory on page 7 if postweighing is not to be performed on the premises.
Note: If inhalable samples were collected
to determine exposure to formaldehyde on
dust using NIOSH Method 5700, place the
cassette cover on the cassette and load it into
the transport clip (Figure 9). Send cassette in
clip, a blank, and all other pertinent sampling
information to a laboratory for analysis.
Figure 8. IOM Sampler and
pump on worker
6
Transporting Samples to a Laboratory
For gravimetric samples: Place cassette cover
on cassette immediately following sampling
and insert into a transport clip (Figure 9).
Place unit into a sterile plastic bag. Package
in a padded envelope and send to a laboratory for analysis. Include pertinent sampling
information and blanks. If post-weighing on
the premises, see Analysis, Post-weighing for
Gravimetric Analysis below.
Figure 9. Load IOM cassette into
transport clip.
For chemical samples:
1. Wearing gloves, unscrew the IOM front plate.
2. Remove the stainless steel cassette.
3. Choose from the following options:
a. Immediately place entire cassette/filter assembly into a large vial filled
with method-specified desorbing solution and cap the vial or,
b. Immediately remove cassette top and use forceps to remove filter. Place
filter in a vial filled with method-specified desorbing solution and cap the
vial.
4. Package securely to prevent leakage and breakage, include pertinent sampling information and blanks, and send to a laboratory for analysis.
Sample Blanks
Load and handle the blank IOM Sampler in the same manner as the IOM used
for sampling. Do not pull air through the blank. Send the blank with the samples
to a laboratory.
Analysis
Post-weighing for Gravimetric Analysis
Caution: Wear powder-free gloves when handling cassettes and
use forceps when working with filters.
1. If using a plastic cassette, equilibrate cassette and filter for a reasonable time
based on humidity conditions.
2. Remove the cassette from the transport clip before weighing. The cassette
cover can remain on if it was used during pre-weighing.
3. Weigh the entire cassette. Compare the pre and post weights. The difference is
the amount of inhalable particles collected.
The IOM cassette can be cleaned, reloaded with a fresh filter, and reused.
See Cleaning Sampler on page 3.
Chemical Analysis
Follow method instructions for sample preparation and analysis.
7
References
Mark, D. and Vincent, J. H., “A New Personal Sampler for Airborne Total Dust in Workplaces,” Ann. Occup.
Hyg. Vol. 30, 1986, pp. 89-102
ACGIH Technical Committee on Air Sampling Procedures: Particle Size-selective Sampling in the Workplace,
ACGIH, Cincinnati, Ohio, 1984
Ordering Information
The IOM requires a 25-mm filter; see below.
Description
IOM Sampler and cassette, in conductive plastic, with transport clip and cover
IOM Sampler and cassette, in stainless steel, with transport clip and cover
IOM Sampler, in conductive plastic, with stainless steel cassette, transport clip,
and cover
Cat. No.
225-70A
225-76A
225-79A
Accessories
Cassette assembly, in conductive plastic, with transport clip and cover
Cassette assembly, in stainless steel, with transport clip and cover
Transport Clip and Cover
Calibration Adapter
Single Hole Lead Head, for sampling lead according to MDHS 6
225-71A
225-75A
225-72A
391-01
225-52
25-mm Filters for IOM, each sample requires its own filter
PVC, 5.0 μm, pk/100
Glass Fiber, 1.0 μm, pk/500
MCE, 0.8 μm, pk/100
Polycarbonate, 0.8 μm, pk/100
Gelatin, pk/50
225-8-04
225-702
225-1930
225-1601
225-9551
SKC Limited Warranty and Return Policy
SKC products are subject to the SKC Limited Warranty and Return Policy,
which provides SKC’s sole liability and the buyer’s exclusive remedy. To view the
complete SKC Limited Warranty and Return Policy, go to http://www.skcinc.com/
warranty.asp.
www.skcinc.com
Form #37372 Rev 1006
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