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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. 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.
575/579 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
Passive monitor has passed NIOSH protocol requirements for: sampling rate, desorption
efficiency, humidity effects, reverse diffusion, and storage stability test for
reactive compounds. Partial validations are not recommended for compliance sampling.
Calculated
Uptake rate that is calculated from the physical properties of the analyte and
geometry of the sampler. Calculated rates are not based upon direct laboratory
testing of the analyte with the sampler. Calculated validations are not recommended
for compliance sampling.
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.
-
- 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.
This SKC Air Sampling Guide is a reference only to assist users in finding the method, sampling equipment, and sampling media for a specific compound. This publication is intended for general information only and should not be used as a substitute for reviewing applicable government regulations, equipment operating instructions, or legal standards. Users must consult the appropriate sampling method for the compound of interest before sampling. The sampling parameters shown here are suggestions based on the ranges or volume, flow, and time specified in the methods. It is the responsibility of the analyst performing the sampling and analysis steps to adjust the parameters so that the required detection limits can be obtained. The information contained in this document should not be construed as legal advice or opinion nor as a final authority on legal or regulatory procedures.
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