ASTM D4298-04

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Designation:D4298–04
Standard Guide for
1
Intercomparing Permeation Tubes to Establish Traceability
This standard is issued under the fixed designation D4298; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E617 Specification for Laboratory Weights and Precision
Mass Standards
1.1 This guide covers two procedures for establishing the
permeation rate of a permeation tube and defining the uncer-
3. Terminology
tainty of the rate by comparison to National Institute of
3.1 Definitions:
Standards and Technology’s Standard Reference Materials
3.1.1 For definitions of terms used in this guide, refer to
(SRM).
Terminology D1356.
1.2 Procedure A consists of a direct comparison of the
3.1.2 Definitions of Terms Specific to This Standard:
permeation rate of the device undergoing calibration with that
3.1.2.1 working standard—astandardusedinthelaboratory
of an SRM.
or field for periodic standardization of a measuring instrument.
1.3 Procedure B consists of a gravimetric calibration pro-
cess in which a certified permeation tube is used as a quality
4. Summary of Guide
control for the measurements.
4.1 Procedure A—A certified SRM permeation source, ob-
1.4 Both procedures are limited to the case where a suitable
tained from the National Institute of Standards andTechnology
certified permeation device is available.
is used to calibrate a continuous analyzer. The analyzer is then
1.5 This standard does not purport to address all of the
used to measure the concentration of a gaseous mixture
safety concerns, if any, associated with its use. It is the
generated from the permeation tube under calibration. Equa-
responsibility of the user of this standard to establish appro-
tionsareprovidedthatpermitcalibrationofthepermeationrate
priate safety and health practices and determine the applica-
of the latter from the test data.
bility of regulatory limitations prior to use. (See 8.2 on Safety
4.2 Procedure B—The permeation source is calibrated,
Precautions.)
gravimetrically, using temperature and mass standards trace-
2. Referenced Documents able to NIST standards. The validity of the calibration is
2 confirmed by concurrently measuring the permeation rate of a
2.1 ASTM Standards:
Certified Reference Material (CRM).
D1356 Terminology Relating to Sampling and Analysis of
Atmospheres
5. Significance and Use
D3249 Practice for General Ambient Air Analyzer Proce-
5.1 The accuracy of air pollution measurements is directly
dures
dependent upon accurate calibrations.
D3609 Practice for Calibration Techniques Using Perme-
5.2 Such measurements gain accuracy and can be intercom-
ation Tubes
pared when the measurement procedures are traceable to
D3631 Test Methods for Measuring Surface Atmospheric
national measurement standards.
Pressure
5.3 This guide describes procedures for enhancing the
E1 Specification for ASTM Liquid-in-Glass Thermometers
accuracyofairpollutionmeasurementswhichmaybespecified
E319 Practice for the Evaluation of Single-Pan Mechanical
by those organizations requiring traceability to national stan-
Balances
dards.
1 6. Apparatus
This guide is under the jurisdiction ofASTM Committee D22 on Sampling and
Analysis of Atmospheres and is the direct responsibility of Subcommittee D22.01
6.1 For apparatus used in the calibration of permeation
on Quality Control.
devices, refer to Practice D3609.
Current edition approved October 1, 2004. Published October 2004. Originally
6.1.1 The thermometers used shall conform to Specification
approved in 1983. Last previous edition approved in 1999 as D4298 - 95 (1999).
DOI: 10.1520/D4298-04.
E1 and shall have calibration certificates traceable to the NIST.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Measurement uncertainty should be 0.1°C or less.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1.2 ThemercurybarometershallconformtoTestMethods
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. D3631.
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D4298–04
6.2 Apparatus for Procedure A: 9.1.1 Set up a gas generation system using a Certified
6.2.1 Analytical Instruments—An analytical instrument re- Reference Material (CRM) permeation tube and apparatus and
sponsive to the permeant with the following minimum perfor- procedure such as described in Practice D3609. Equilibrate at
mance specifications: the desired temperature of calibration.
Noise 1 % of full-scale 9.1.
...