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SKC Passive Sampling Guide
Search the Passive Sampler Guide
Passive (diffusive) samplers provide a simple, reliable, and economical method
for air sampling. Available for personal and area sampling, these small, lightweight
samplers include passive badges, formaldehyde samplers, Passive Bubblers and
color dosimeter (diffusion) tubes, and dermal patches. Choose the sampler that
fits your sampling application.
Validation for compliance sampling.
Due to their design, passive (diffusive) samplers are subject to factors such
as face velocity and reverse diffusion not associated with active sorbent sampling.
In addition, passive samplers do not have a back-up section, therefore, they
require extensive testing to ensure sample validity. Passive samplers are validated
to different protocols; Air Quality Research and OSHA have tested the SKC Personal
Formaldehyde Samplers and the Mercury Passive Sampler to in-house validation
protocols.
575 Series Passive Sampler Validation
For compliance sampling, it is recommended that only passive samplers with full
or bi-level validation be used. SKC 575 Series Passive Samplers for organic vapors
have been validated according to the very rigorous NIOSH testing
protocol 1. NIOSH validation protocols includes these
four levels:
Full
All NIOSH Partial Validation protocol and factorial study including interfering
compounds, passed. This is the most rigorous test possible and includes all parameters
that can affect sampling accuracy (formerly referred to as Level 5).
Bi-Level
A key member of an homologous series has passed Full and all others passed Partial.
The validity of this has been shown by Guild et. al. 2 (formerly
referred to as Level 5B).
Partial
NIOSH validation protocol for sampling rate, desorption efficiency, humidity
effects, reverse diffusion, and storage stability test passed (formerly referred
to as Level 4).
Calculated
Uptake rates calculated from the equation D x (A/L) where D is the diffusion
coefficient calculated from the Hierschfelder Equation and A/L is a geometric
constant of the sampler verified through comparison of uptake rates from full
validations
Chemical Hazards by First Letter
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Custom Passive Samplers Available
For specific applications, SKC will manufacture filters to meet your specific
requirements. Download the Custom Filter Order Form in PDF format. Complete the
form and fax it to your SKC representative or
contact your SKC representative or call the
SKC Sales Department at 724-941-9701 for more information.
Custom Passive Sampler Order Form (PDF Format)
References:
- 1
- Cassinelli, M.E., Hull, R.D., Crable, J.V. and Teass, A.W., "Diffusive
Sampling: An Alternative to Workplace Air Monitoring," A. Berlin, R.H. Brown
and K.J. Saunders (Royal Society of Chemistry, London) (eds.), NIOSH Protocol
for the Evaluation of Passive Monitors, 1987, pp 190-202.
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- 2
- Guild, L.V., Myrmel, K.H., Myers, G. and Dietrich, D.F., "Bi-Level Passive
Monitor Validation: A Reliable Way of Assuring Sampling Accuracy for a Larger
Number of Related Chemical Hazards" Appl. Occup. Environ. Hyg., Vol
7, No. 5, May 1992, pp. 310-317. Copies available from SKC.
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