ASTM D4765-03(2008)
(Test Method)Standard Test Method for Fluorides in Workplace Atmospheres
Standard Test Method for Fluorides in Workplace Atmospheres
SIGNIFICANCE AND USE
The capability of this test method to collect and quantitate both particulate and gaseous fluorides over the ranges normally encountered in industrial atmospheres makes it applicable for industrial hygiene evaluation and control purposes. The recommended range of this test method is from 0.005 to 5 mg F−/m3 air.
SCOPE
1.1 This test method covers the simultaneous collection and separate measurements of gaseous and particulate fluoride found in certain industrial workplaces. The gaseous inorganic fluorides collected are reported in terms of fluoride; the procedure is not applicable to the collection or analysis of other fluoride-bearing gases (for example, fluorocarbon or fluorosulfur compounds). This test method covers sample collection, preparation, and fluoride measurement.
1.2 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.
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Designation: D4765 − 03(Reapproved 2008)
Standard Test Method for
1
Fluorides in Workplace Atmospheres
This standard is issued under the fixed designation D4765; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope from the sample of air, is absorbed by an alkali-impregnated
cellulose pad placed immediately behind the membrane filter.
1.1 This test method covers the simultaneous collection and
The membrane filter and collected solids are made alkaline,
separate measurements of gaseous and particulate fluoride
ashed, and the residue fused with additional alkali. Finally, the
found in certain industrial workplaces. The gaseous inorganic
fluoride is determined in a solution of the melt by use of a
fluorides collected are reported in terms of fluoride; the
fluorideion-selectiveelectrode.Gaseousfluorideisdetermined
procedureisnotapplicabletothecollectionoranalysisofother
inanaqueousextractofthecellulosepad,alsobymeansofthe
fluoride-bearing gases (for example, fluorocarbon or fluorosul-
fluoride ion-selective electrode.
fur compounds). This test method covers sample collection,
preparation, and fluoride measurement.
5. Significance and Use
1.2 This standard does not purport to address all of the
5.1 The capability of this test method to collect and quan-
safety concerns, if any, associated with its use. It is the
titate both particulate and gaseous fluorides over the ranges
responsibility of the user of this standard to establish appro-
normally encountered in industrial atmospheres makes it ap-
priate safety and health practices and determine the applica-
plicableforindustrialhygieneevaluationandcontrolpurposes.
bility of regulatory limitations prior to use.
The recommended range of this test method is from 0.005 to 5
− 3
mg F /m air.
2. Referenced Documents
2
2.1 ASTM Standards:
6. Interferences
D1193Specification for Reagent Water
6.1 Because an ion-selective electrode responds to ionic
D1356Terminology Relating to Sampling and Analysis of
activity, insoluble and complex forms of fluoride must be
Atmospheres
released by appropriate combinations of fusion, adjustment of
D1357Practice for Planning the Sampling of the Ambient
pH, and addition of complexing agents.
Atmosphere
6.2 Acidity (pH) and ionic strengths of fluoride standard
D5337Practice for Flow RateAdjustment of Personal Sam-
solutions must be matched to those of samples.
pling Pumps
6.3 Temperature of sample and standard solutions must be
3. Terminology
controlled within 62°C.
3.1 Definitions—For definitions of terms used in this test
method, refer to Terminology D1356. 7. Apparatus
7.1 Personal Sampling Pump, Equipped with a flow-
4. Summary of Test Method
monitoring device (rotameter, critical orifice) or a constant-
4.1 Particulate material from a measured volume of air is
flow device capable of drawing 2 L/min of air through the
collected by means of a membrane filter. Gaseous fluoride,
0.8-µm membrane filter and pad for a period of 8 h.
7.2 Filter Holder—Plasticholdersofthepreloadedpersonal
1
This test method is under the jurisdiction of ASTM Committee D22 on Air
monitor type, that accept filters of 37-mm diameter, are
Qualityand is the direct responsibility of Subcommittee D22.04 on Workplace Air
preferred. The holder is to be numbered for identification.
Quality.
Current edition approved April 1, 2008. Published July 2008. Originally
7.3 MembraneFilter,ofmixed-celluloseesters,0.8-µmpore
approved in 1988. Last previous edition approved in 2003 as D4765–03. DOI:
size, and of diameter to fit the filter holder (see 7.2).
10.1520/D4765-03R08.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.4 Cellulose Pad, of size to fit the filter holder (see 7.2).
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
The pad is commercially available as a plain, unpregnated pad
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. or as an alkali-impregnated pad.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D4765 − 03 (2008)
3
7.5 Crucibles, 20-mL, nickel, Inconel, or platinum. worker’s collar and remove the plug for closed-face sampling.
Air is drawn through the filter at the calibrated rate of
7.6 Fluoride Ion-Selective Electrode.
approximately 2.0 L/min and maintained at that rate by
7.7 Reference Electrode,calomeltype,preferablycombined
occasional checking and adjustment. On termination of
with the fluoride ion-selective electrode.
sampling,notethedurationofsampling
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D4765–98 Designation:D4765–03 (Reapproved 2008)
Standard Test Method for
1
Fluorides in Workplace Atmospheres
This standard is issued under the fixed designation D4765; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the simultaneous collection and separate measurements of gaseous and particulate fluoride found
in certain industrial workplaces. The gaseous inorganic fluorides collected are reported in terms of fluoride; the procedure is not
applicabletothecollectionoranalysisofotherfluoride-bearinggases(forexample,fluorocarbonorfluorosulfurcompounds).This
test method covers sample collection, preparation, and fluoride measurement.
1.2 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D1193 Specification for Reagent Water
D1356 Terminology Relating to Sampling and Analysis of Atmospheres
D1357 Practice for Planning the Sampling of the Ambient Atmosphere
D5337 Practice for Flow Rate for Calibration of Personal Sampling Pumps
3. Terminology
3.1 Definitions— For definitions of terms used in this test method, refer to Terminology D1356.
4. Summary of Test Method
4.1 Particulate material from a measured volume of air is collected by means of a membrane filter. Gaseous fluoride, from the
sample of air, is absorbed by an alkali-impregnated cellulose pad placed immediately behind the membrane filter. The membrane
filter and collected solids are made alkaline, ashed, and the residue fused with additional alkali. Finally, the fluoride is determined
in a solution of the melt by use of a fluoride ion-selective electrode. Gaseous fluoride is determined in an aqueous extract of the
cellulose pad, also by means of the fluoride ion-selective electrode.
5. Significance and Use
5.1 The capability of this test method to collect and quantitate both particulate and gaseous fluorides over the ranges normally
encountered in industrial atmospheres makes it applicable for industrial hygiene evaluation and control purposes. The
− 3
recommended range of this test method is from 0.005 to 5 mg F /m air.
6. Interferences
6.1 Because an ion-selective electrode responds to ionic activity, insoluble and complex forms of fluoride must be released by
appropriate combinations of fusion, adjustment of pH, and addition of complexing agents.
6.2 Acidity (pH) and ionic strengths of fluoride standard solutions must be matched to those of samples.
6.3 Temperature of sample and standard solutions must be controlled within 62°C.
1
This test method is under the jurisdiction ofASTM Committee D-22 on Sampling andAnalysis ofAtmospheres and is the direct responsibility of Subcommittee D22.04
on Workplace Atmospheres.
Current edition approved May 10, 1998. Published July 1998. Originally published as D4765–88. Last previous edition D4765–93.
1
This test method is under the jurisdiction ofASTM Committee D22 onAir Quality and is the direct responsibility of Subcommittee D22.04 on WorkplaceAir Quality
.
Current edition approved April 1, 2008. Published July 2008. Originally approved in 1988. Last previous edition approved in 2003 as D4765–03.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
, Vol 11.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D4765–03 (2008)
7. Apparatus
7.1 Personal Sampling Pump, Equipped with a flow-monitoring device (rotameter, critical orifice) or a constant-flow device
capable of drawing 2 L/min of air through the 0.8-µm membrane filter and pad for a period of 8 h.
7.2 Filter Holder—Plasticholdersofthepreloadedpersonalmonitortype,thatacceptfiltersof37-mmdiameter,arepreferred.
The holder is to be numbered for identification.
7.3 Membrane Filter, of mixed-cellulose esters, 0.8-µm pore size, and of diameter to fit the filter holder (see 7.2).
7.4 Cellulose Pad,
...
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