ASTM F1277-02

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
Designation:F1277–02
Standard Test Method for
Determination of Leachable Chloride in Packing and
1
Gasketing Materials by Ion-Selective Electrode Technique
This standard is issued under the fixed designation F1277; 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 selective electrode in conjunction with a double junction,
sleeve-type reference electrode. Potentials are read using a
1.1 This test method provides for the measurement of
pH/mV meter having 0.1 mV readability.
chloride ion leached from flexible graphite, asbestos, or paper-
3.2 Acalibration curve is prepared by plotting the potentials
based packing and gasketing materials. Samples containing 7
-
of known chloride solutions versus the corresponding concen-
to 6700 µg Cl /g sample can be analyzed with this procedure.
trations expressed in micrograms per millilitre. The chloride
The upper concentration limit can be extended by dilution of
concentration of the test solution is determined from the
the test solution.
calibrationcurve,andthisvalueisusedtocalculatetheamount
1.2 It is the responsibility of the analyst to ensure the
of chloride in parts per million that was leached from the
validity of this test method for other packing or gasketing
packing or gasketing material. The calibration and test solu-
materials.
tions must be measured at the same temperature [within 61°C
1.3 The values stated in SI units are to be regarded as the
(62°F)].
standard. The values given in parentheses are for information
3.3 The calibration and test solutions are diluted with ionic
only.
strength adjustor which also minimizes possible interferences
1.4 This standard does not purport to address all of the
such as ammonia, bromide, iodide, cyanide, or sulfide (seeTest
safety concerns, if any, associated with its use. It is the
Methods D512).
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Significance and Use
bility of regulatory limitations prior to use. Aspecific warning
4.1 Chloride ion is highly detrimental to the valves, flanges,
statement is given in 8.3.
piping, etc. of stainless steel and copper-bearing alloys em-
2. Referenced Documents ployed in certain types of facilities, such as nuclear and
2 chemical plants.Therefore, the amount of chloride ion that can
2.1 ASTM Standards:
be leached from packing and gasketing materials used in these
D512 Test Methods for Chloride Ion In Water
facilities must be controlled closely for prevention of damage.
E50 Practices for Apparatus, Reagents, and Safety Consid-
This test method is suitable for manufacturing control and for
erations for Chemical Analysis of Metals, Ores, and
verifying that the packing and gasketing material meets speci-
Related Materials
fications.
E691 Practice for Conducting an Interlaboratory Study to
4.2 It is assumed that the users of this test method will be
Determine the Precision of a Test Method
analysts capable of performing common laboratory procedures
E882 Guide for Accountability and Quality Control in the
skillfully and safely. It is recommended that the work will be
Chemical Analysis Laboratory
performed in a properly equipped laboratory under appropriate
3. Summary of Test Method quality control practices such as those described in Guide
E882.
3.1 Chloride ion leached from packing and gasketing mate-
rials is measured potentiometrically using a chloride ion-
5. Interferences
5.1 There is no interference from up to 500 µg/mL of
1
This test method is under the jurisdiction ofASTM Committee F03 on Gaskets
sulfide, 1000 µg/mL of bromide or iodide, a one hundred-fold
and is the direct responsibility of Subcommittee F03.50 onAnalyticalTest Methods.
excess of cyanide over chloride, or 1000 µg/mL of ammonia.
Current edition approved October 10, 2002. Published October 2002. Originally
Ferric, cupric, and permanganate ions do not interfere. Mer-
published as F1277 – 90. Last previous edition F1277 – 95. DOI: 10.1520/F1277-
02. cury must not be present.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards 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 ----------------------
F1277–02
-
6. Apparatus 7.1.1.6 2.5 µg/mL Cl Solution—With a 25-mL volumetric
-
pipet, pipet 25 mL of 10 µg/mL Cl stock solution into a
6.1 Digi
...