| Passive Samplers for Organic Vapors |
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A cross-sectional view of the SKC 575 Series Passive Sampler. A
diffusion barrier maintains sample uptake by molecular diffusion
independent of wind velocity. The sorbent is chosen to best collect
the chemical hazards of interest. |
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Browse Passive Gas &
Organic Vapor Sampling Online Catalog ◄
SKC Passive Samplers
SKC passive samplers are small "badges" that collect organic
vapors without the use of a pump. Individual chemicals simply
diffuse from the atmosphere into the sampler at a fixed rate. SKC
has scientifically validated the sampling rate of the 575-series
passive samplers along with other critical sampling parameters to
provide you with documented proof of reliability.
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Accuracy
SKC passive samplers meet OSHA accuracy and precision
requirements for passive samplers.
Economy
No additional equipment needed for air sampling. SKC
passive samplers offer full-shift 8-hour sampling; you only
need one sampler for a true TWA sample. One sampler
means only one analysis.
Efficiency
No need to make multiple worksite visits to change sampling
media; full-shift sampling can be done for most compounds
with just ONE sampler.
No multiple layers
No need for expensive backup layers. SKC Passive Samplers have
proven results up to 2 times the allowable limit with the
presence of interfering compounds. |
STEL sampling
SKC passive sampler design permits reliable short-term
measurements.
Peace-of-mind
Extensive testing and documented results mean data will stand up
in court.
Choice of sorbents
Only SKC offers a choice of sorbents to better collect specific
chemicals.
No reverse diffusion
Proper sorbent selection ensures that adsorbed chemicals do not
reverse diffuse once trapped onto the collection media.
Superior collection efficiency
SKC sorbents have a larger surface area compared to sorbent
wafers or strips, providing higher capacities. |
Full Shift Sampling
With Only ONE Badge
SKC 575 Series Passive Samplers are validated for a
full 8 hours, that's TWICE the limit value! This assures the
integrity of the sampler, so you only need ONE badge to get a true
8-hour TWA!
Using an SKC Passive Sampler
Step 1.
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After selecting the appropriate Passive Sampler
for the organic vapor of interest, see the
Air Sampling
Guide by Chemical; remove the sampler from the sealed pouch. Keep all
parts for future use. |
Step 1. |
Step 2.
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Record the start time on the sampler label. |
Step 2. |
Step 3.
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Attach the sampler to a worker near the
breathing zone; the small holes should be facing out. |
Step 3. |
Step 4.
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At the end of the sampling period, remove the
sampler, from the worker and seal it with the provided cap and
O-ring. |
Step 4. |
Step 5.
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Record the stop time on the sampler label. |
Step 5. |
Step 6.
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Send the sampler to an AIHA-accredited
laboratory for analysis. See the 575-Series
Passive Samplers Analytical Laboratories Reference List
online. |
Step 6. |
575 Series
Passive Samplers
Validated to NIOSH Protocol 1
For compliance sampling, it is recommended that only
passive samplers with full or bi-level validation be used. Passive
samplers with lower levels of validation may be used only if
verified by validated sorbent sample tube methods.
Validation
Passive sampling is quite different from active
sampling with sorbent tubes. With this fact in mind, NIOSH
established validation protocols for evaluating the performance of
passive samplers. 1 Protocol validation was
developed so that manufacturers could produce passive samplers that
reliably assess airborne levels.
Validation Levels
- Full
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Passive monitor has passed all NIOSH protocol
validation requirements listed under partial validation, plus a
factorial study that includes interfering compounds. This is the
most rigorous test possible and includes all parameters that can
affect sampling accuracy (formerly referred to as Level 5).
- Bi-Level
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A key member of an homologous series has passed Full
and all other members have passed Partial. The validity of this has
been shown by Guild et. al. 2(formerly referred to
as Level 5B).
- Partial
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Passive monitor has passed NIOSH protocol
requirements for: sampling rate, desorption efficiency, humidity
effects, reverse diffusion, and storage stability test for reactive
compounds whose stability is suspect (formerly referred to as Level
4).
- Calculated
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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
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.
►
Browse Passive Gas &
Organic Vapor Sampling Online Catalog ◄
Passive Sampler Ordering Information
Complete instructions, and sampling rates are included with each sampler package |
| Description |
Sorbent
(Amount) |
Cat. No. |
Quantity |
| Passive Sampler for Organic Vapor |
Charcoal
(350 mg.) |
575-001 |
5 |
| 575-001A |
25 |
| Passive Sampler for Organic Vapor |
Anasorb® 747
(500 mg.) |
575-002 |
5 |
| Passive Sampler for Organic Vapor |
Anasorb® 727
(300 mg.) |
575-003 |
5 |
| Passive Sampler for Methylene Chloride |
Charcoal
(350 mg.) |
575-001MC |
5 |
| 575-001MCA |
25 |
| Accessories |
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| Desorption Shaker (115V) with rack |
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226D-03K |
1 |
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exact SKC Item Number by entering it here:
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