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Particulate Sampling

From:   Author:   Date:2011-11-03  

About Particle Size-selective Sampling
The concept of size-selective sampling of industrial aerosols is based on the measurement of particles that are associated with a specific human health effect, i.e., how deeply particles penetrate into the respiratory tract. ACGIH recommends that particle-size selective threshold limit values (TLVs®) be expressed in three forms:
1. Inhalable (100-µm 50% cut-point), hazardous when deposited anywhere in the respiratory tract
2. Thoracic (10-µm 50% cut-point), hazardous when deposited in the lung airways and the gas exchange regions
3. Respirable (4-µm 50% cut-point), hazardous when deposited in the gas exchange regions of the lungs

PM2.5 and PM10 sampling according to EPA regulations determines compliance with ambient air quality standards and reveals information on particle sources and their effect on the environment and public health.

SKC Particle Size-selective Sampler Guide
With the many particle size-selective sampling devices available, it is sometimes difficult to gather all of the information needed to determine the one best suited for an application. Ultimately, it is the user's responsibility to choose the device required for a specific sampling application and environment. SKC offers several particle size-selective devices for the collection of respirable, PM2.5, PM10, or inhalable size particles. Use the convenient guide below to help select a device to meet your application and to find information on it in the appropriate page. Refer to the SKC Air Sampling Guides for specific compounds and methods.

Sampler

Classification

Flow Rate

50% Cut-point

Recommended
Calibration Device

Filter Size

Unique Features


Button Sampler

Inhalable

4 L/min

100 µm

Button Sampler Calibration Adapter

25 mm

Low sensitivity to ambient air conditions

Reduces oversampling of very large particles


IOM Sampler


Inhalable


2 L/min


100 µm


IOM Calibration Adapter

25 mm


Complies with MDHS 14/3

Meets US and international standards including the ACGIH sampling criteria for inhalable dust


GS-3 Cyclone

Respirable

2.75 L/min
3.7 L/min

4.0 µm
3.5 µm

Multi-purpose Calibration Jar

25 mm
or
37 mm

Overcomes sampling problems reported with Dorr-Oliver

Conductive


SKC Aluminum Cyclone

Respirable

2.5 L/min
2.8 L/min

4.0 µm
3.5 µm

Aluminum Cyclone Calibration Chamber

25 mm
or
37 mm

Specified in NIOSH 7500 (silica) and NIOSH 0600 (respirable particulates)

Parallel Particle Impactor (PPI)

Respirable

or

Thoracic

2 L/min

2 L/min

4.0 µm


10 µm

Multi-purpose Calibration Jar

37-mm collection filter and 9.5-mm impaction substrate

 

Matches entire curve more closely than any other sampler

Meets NIOSH 5524 and suitable for ACGIH thoracic TLVs®

 


DPM Cassette

Sub-micron

1.7 L/min
2 L/min

< 1.0 µm

Multi-purpose Calibration Jar if used with GS-1 Cyclone

37 mm

Integral precision-jeweled impactor

Low carbon background filters

Tamper-evident seal


PEM Sampler

PM2.5

PM10 (thoracic)

2 L/min
4 L/min
10 L/min

2.5 µm
or
10.0 µm

PEM Calibration cap

37 mm

Referenced in EPA Method IP-10A for particles in indoor air


Sioutas
Cascade Impacto
r

Fractionates
2.5 µm & above
1.0 - 2.5 µm
0.5 - 1.0 µm
0.25 - 0.5 µm
< 0.25 µm

9 L/min

2.5 µm
1.0 µm
0.5 µm
0.25 µm

None required

37-mm after filter and 25-mm collection substrate

Minimal particle bounce

Sample coarse, fine, and ultrafine particles

Preserves unstable compounds

IMPACT Single-stage Impactor

PM2.5

or

PM10

or

PM Coarse

10 L/min



10 L/min

 

10 L/min

2.5 µm

or

10 µm

or

10 µm, 2.5 µm

IMPACT Cal Adapter

47-mm collection filter and 37-mm impaction substrate

Follows closely EPA reference methods and criteria

Convenient disposable impaction substrate

Personal Modular Impactor (PMI)

PM2.5

or

PM10

or

PM Coarse

3 L/min



3 L/min

 

3 L/min

2.5 µm

or

10 µm

or

10 µm, 2.5 µm

PMI Cal Adapter

37-mm collection filter and 25-mm impaction substrates

Convenient modular design

Suitable for ACGIH thoracic TLVs®