ASTM D4653-87(2015)
(Test Method)Standard Test Method for Total Chlorides in Leather
Standard Test Method for Total Chlorides in Leather
SIGNIFICANCE AND USE
3.1 This test method is used to determine amount of soluble chlorides in leather.
SCOPE
1.1 This test method is intended for use in determining total chlorides in mineral tanned leather.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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: D4653 − 87 (Reapproved 2015)
Standard Test Method for
Total Chlorides in Leather
This standard is issued under the fixed designation D4653; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 6. Sampling, Test Specimens and Test Units
1.1 This test method is intended for use in determining total 6.1 The test specimen shall consist of1gof leather from the
chlorides in mineral tanned leather. composite sample in accordance with Practice D2813.
1.2 The values stated in SI units are to be regarded as 6.2 Two specimens from the composite sample shall be
standard. No other units of measurement are included in this tested.
standard.
7. Procedure
1.3 This standard does not purport to address all of the
7.1 Weigh the specimen to the nearest milligram and record
safety concerns, if any, associated with its use. It is the
the value as W. Transfer the specimen to a 250 mL volumetric
responsibility of the user of this standard to establish appro-
flask and add 200 mL of 0.1 N ammonium hydroxide solution.
priate safety and health practices and determine the applica-
Immerse the flask up to the neck in a bath of boiling water.
bility of regulatory limitations prior to use.
Thoroughly wet all particles by occasional swirling. After 2 h,
cool the flask to room temperature and make the flask up to
2. Referenced Documents
volume with distilled water, shake and without delay filter
2.1 ASTM Standards:
through a folded filter paper.
D2813 Practice for Sampling Leather for Physical and
7.2 Discard the first 20 to 25 mL of the filtrate. Pipette 200
Chemical Tests
mL of the filtrate into a 600 mL beaker, add a few drops of
methyl orange indicator and neutralize with 5 % acetic acid to
3. Significance and Use
an orange color.Add 2 to 3 mLof 5 % potassium chromate and
3.1 This test method is used to determine amount of soluble
titrate the solution with 0.1 N silver nitrate. Record the
chlorides in leather.
millilitre of silver nitrate asA.Titrate 200 mLof distilled water
containing a few drops of methyl orange indicator and 2 to 3
4. Apparatus
mL of 5 % potassium chromate with 0.1 N silver nitrate as a
4.1 Volumetric Flask, 250 mL.
blank and the millilitre of silver nitrate used and recorded as B.
8. Calculation of Results
5. Reagents
8.1 Calculate the percent total chlorides as follows:
5.1 Acetic Acid Solutions—5 or 10 % by volume.
totalchlorides,% 5 A 2B N/W 30.0355 3250/200 3100 (1)
~ !
5.2 Methyl Orange—0.02 % solution in 50 % alcohol.
where:
5.3 Ammonium Hydroxide Solution, (0.1 N).
A = millilitres of standard silver nitrate used for titrating the
5.4 Silver Nitrate, Standard Solution, (0.1 N).
sample,
5.5 Potassium Chromate Solution,5%.
B = millilitres of standard silver nit
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This document is not an ASTM standard and is intended only to provide the user of an ASTM 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: D4653 − 87 (Reapproved 2009) D4653 − 87 (Reapproved 2015)
Standard Test Method for
Total Chlorides in Leather
This standard is issued under the fixed designation D4653; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This test method is intended for use in determining total chlorides in mineral tanned leather.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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
2.1 ASTM Standards:
D2813 Practice for Sampling Leather for Physical and Chemical Tests
3. Significance and Use
3.1 This test method is used to determine amount of soluble chlorides in leather.
4. Apparatus
4.1 Volumetric Flask, 250 mL.
5. Reagents
5.1 Acetic Acid Solutions—5 or 10 % by volume.
5.2 Methyl Orange—0.02 % solution in 50 % alcohol.
5.3 Ammonium Hydroxide Solution, (0.1 N).
5.4 Silver Nitrate, Standard Solution, (0.1 N).
5.5 Potassium Chromate Solution, 5 %.
6. Sampling, Test Specimens and Test Units
6.1 The test specimen shall consist of 1 g of leather from the composite sample in accordance with Practice D2813.
6.2 Two specimens from the composite sample shall be tested.
7. Procedure
7.1 Weigh the specimen to the nearest milligram and record the value as W. Transfer the specimen to a 250 mL volumetric flask
and add 200 mL of 0.1 N ammonium hydroxide solution. Immerse the flask up to the neck in a bath of boiling water. Thoroughly
wet all particles by occasional swirling. After 2 h, cool the flask to room temperature and make the flask up to volume with distilled
water, shake and without delay filter through a folded filter paper.
This test method is under the jurisdiction of ASTM Committee D31 on Leather and is the direct responsibility of Subcommittee D31.06 on Chemical Analysis.
Current edition approved April 1, 2009Sept. 1, 2015. Published July 2009October 2015. Originally approved in 1987. Last previous edition approved in 20032009 as
D4653 – 87 (2003).(2009). DOI: 10.1520/D4653-87R09.10.1520/D4653-87R15.
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.
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