SKC 225-70A User Manual

Operating Instructions

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863 Valley View Road, Eighty Four, PA 15330 USA

IOM Personal Samplers and

IOM Samplers with MultiDust

Stainless steel IOM

Conductive plastic IOM

Description

The patented* IOM Sampler is a sampling head that houses a reusable two-part
fi lter casse e with specifi ed 25-mm fi lter for the collection of inhalable airborne
particles. The fi lter and casse e assembly are pre and post-weighed as a single unit
for gravimetric analysis. The IOM Sampler and casse e are 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

• NIOSH Method 5700 for formaldehyde on dust

• Australian standard for inhalable particulate

• Preferred sampler for HSE Method MDHS 14/3 for inhalable and respirable dust

• Complies with MDHS 25/3 for organic isocyanates (with stainless steel model)

• Complies with MDHS 6 for lead (with accessory single-hole head)

• ISO

• OSHA equivalent method for particulates not otherwise regulated (PNOR)

The sampler is supplied with a casse e cover and casse e transport clip to prevent
contamination during transport.

* U.S. Patent No. 4,675,034
‡ Reference: OSHA le er November 8, 2011

®

sampling criteria for inhalable particulate mass

®

/CEN health-related fractions of bioaerosols

‡

IOM with MultiDust Foam Disc

The IOM can be used to sample for inhalable and respirable fractions simultane­ously by using a fi lter and a MultiDust Foam Disc (polyurethane foam). In addition,
a polycarbonate fi lter can be combined with a MultiDust Foam Disc for eff ective
size-selective bioaerosol sampling and be er microorganism survivability when
compared to fi lter-only sampling.

1

Performance Profi le

Flow Rate: 2 L/min (personal sampling)
50% Cut-point: 100 μm at 2 L/min inhalable fraction

4.0 μm at 2 L/min respirable (with MultiDust Foam Disc)

Material: Molded conductive plastic (polypropylene) or

stainless steel

Maximum Operating
Temperature: Plastic IOM and casse e: 212 F (100 C) with no pressure

Stainless steel IOM and casse e: 392 F (200 C) – suitable
for autoclaving and solvent washing

Filters: 25-mm membrane or fi brous fi lter
Tubing: 1/4-inch ID
Weight: (plastic

model with casse e) < 2 oz (55 gm)

Dimensions: 3.3 x 1.1 in (8.5 x 2.8 cm)
Analysis: Gravimetric or chemical (stainless steel model)

† The plastic IOM is NOT suitable for autoclaving or ethylene oxide sterilization

Components and O-ring Placement

Wear powder-free gloves when handling casse es and use forceps
when working with fi lters. Users may wish to use sterile gloves
and forceps depending on the contaminant of interest.

†

Cover

Cassette

Filter

Filter

Front

Cover

Front
plate

O-ring A

plate

Figure 1. Confi guration for conductive plastic IOM
Sampler and cassette - Cat. No. 225-70A and plastic
IOM with stainless steel cassette - Cat. No. 225-79A

O-ring A

Figure 2. Confi guration for stainless steel IOM

Sampler and cassette - Cat. No. 225-76A

O-ring B

O-ring B

Cassette

top

Cassette

top

2

bottom

Cassette

O-ring C

Housing

bottom

Housing

body

body

Collar clip

Outlet

Dust cap

Collar clip

Outlet

Dust cap

O-ring B

O-ring A

Proper O-ring placement in

IOM front plate, plastic and

stainless steel models

Figure 3. O-ring placement

O-ring C

Proper O-ring placement in housing

body, plastic model only

Preparation and Assembly

Handling

Wear powder-free gloves when handling casse es and use forceps when working
with fi lters and foams to prevent the transfer of moisture, dust, or other contami-
nants onto the sampling media. Users may wish to use sterile gloves and forceps
depending on the contaminant of interest.

Cleaning the Sampler

1. Disassemble the IOM Sampler (Figures 1, 2, and 3).

2. Place parts in an ultrasonic cleaner with water and a we ing 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.

Do not use CFC-based substances to clean the plastic IOM. Do
not use solvents on O-rings.

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 so brush. Allow
components to dry completely.

Sterilizing Filter, Foam Disc, and Cassette (for Bioaerosol Sampling)

Polycarbonate Filter

Autoclave polycarbonate fi lter according to manufacturer instructions.

MultiDust Foam Disc

1. Place foam in a sonic bath of distilled water for 20 minutes. Remove from
bath.

2. Rinse foam with distilled water.

3. Dry overnight at 158 F (70 C). Equilibrate to standard conditions of
temperature and humidity.

Do not desiccate foam.

4. Expose foam to ultraviolet light according to a standard UV light exposure
method.

3

IOM Stainless Steel Casse e

Use stainless steel casse e only.

Autoclave stainless steel casse e up to 392 F (200 C).

Reminder: Use powder-free gloves and forceps to insert the fi lter and foam into the
casse e (see Filter Casse e: Opening, Installing Filter, and Closing). Users may wish to
use sterile gloves and forceps depending on the contaminant of interest.

Storage Requirements for IOM MultiDust Foam Discs

IOM MultiDust Foam Discs are sensitive to heat, humidity, and ultraviolet light.
The foams must be stored in the supplied packaging (including the resealable bag).
Keep in a cool, dry place away from direct sunlight. SKC recommends checking the
condition of the foams before use. Note that the expiration date on the package is
subject to correct storage as detailed above.

General Weighing Guidelines

• The plastic casse e with fi lter and MultiDust Foam Disc (if used) should be
equilibrated overnight in a balance room under controlled humidity conditions
and weighed. Maintain a stable humidity level in the balance room. A stainless

steel casse e with fi lter may be desiccated.

• Before pre and post-weighing, wipe the external surface of the sampler with a
clean lint-free paper, cloth, or so brush.

• For inhalable only, pre and post-weigh casse e with fi lter as a single unit. For
inhalable and respirable, pre and post-weigh fi lter, foam, and casse e together
fi rst for inhalable result and then fi lter and casse e bo om together for respirable
result.

• Field blanks can be used to correct weights when using plastic casse es at low
fi lter loadings. See Sample Blanks on page 9.

• The IOM casse e assembled with fi lter or the fi lter alone should be weighed
on a fi ve-fi gure forced balance. Allow the casse e three-and-a-half minutes to
stabilize before taking a reading. The same balance should be used for both pre
and post-weighing procedures.

Pre and Post-weighing for Specifi c Fractions

Particle Size Collected Pre-weigh Components Post-weigh Components

Inhalable only Filter and cassette together Filter and cassette together
Respirable (#1) and

Inhalable (#2)

#1 Filter and cassette
bottom together

#2 Filter, foam, and cassette
together

4

#1 Filter and cassette
bottom together

#2 Filter, foam, and cassette
together