ASTM D 3267 Standard Test Method for Separation and Collection of Particulate and Water-Soluble Gaseous Fluorides in the Atmosphere (Filter and Impinger Method)
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ASTM D 3267 Document Information:
Title
Standard Test Method for Separation and Collection of Particulate and Water-Soluble Gaseous Fluorides in the Atmosphere (Filter and Impinger Method)
ASTM International
Publication Date:
Aug 15, 1991
Scope:
This test method provides a procedure for separation and collection on
a chemically treated filter
and in an impinger of particulate and water-soluble gaseous fluoride
in the atmosphere. The
sampling rate may vary from 30 L/min (1.0 ft³/min) to 15 L/min
(0.5 ft³/min) for longer
sampling periods depending on the atmospheric fluoride concentration.
This test method is not
intended to be applied to gaseous fluorine compounds that are not
water-soluble
There are several limitations of the test method:
Although the acid-treated, medium retentive, prefilter has been shown
to allow passage of HF, it
will restrict passage of particulate matter only as small as about 1
µm. Thus, smaller
particulate matter may pass through the filter and be collected in or
pass through the impingers.
The maximum sample volume to be taken using this test method prior to
changing the acid-treated
prefilter is recommended as 12 m³. This recommendation is made to
minimize any effects due to
particulate matter build-up.
The values stated in SI units are to be regarded as the standard. The
inch-pound units given in
parentheses are for information only.
This standard does not purport to address all of the safety concerns,
if any, associated with its
use. It is the responsibility of the user of this standard to
establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use. For
specific precautionary statements, see 7.2 and 7.4.6.
Keywords:
- ambient atmospheres
- fluorides
- gaseous fluorides
- particulate fluorides
- sampling
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