ASTM D4653-87(1998)

Standard Test Method for Total Chlorides in Leather

SCOPE
1.1 This test method is intended for use in determining total chlorides in mineral tanned leather.  
1.2 This standard does not purport to address all of the safety problems, 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.

General Information

• Status: Historical
• Publication Date: 09-Jan-1998
• Technical Committee: D31 - Leather
• Drafting Committee: D31.06 - Chemical Analysis

Relations

• Replaced By: ASTM D4653-87(2003) - Standard Test Method for Total Chlorides in Leather
• Effective Date: 10-May-2003
• Referred By: ASTM F1668-16(2022) - Standard Guide for Construction Procedures for Buried Plastic Pipe
• Effective Date: 10-Jan-1998

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 4653 – 87 (Reapproved 1998)
Standard Test Method for
Total Chlorides in Leather
This standard is issued under the fixed designation D 4653; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope Immerse the flask up to the neck in a bath of boiling water.
Thoroughly wet all particles by occasional swirling. After 2 h,
1.1 This test method is intended for use in determining total
cool the flask to room temperature and make the flask up to
chlorides in mineral tanned leather.
volume with distilled water, shake and without delay filter
1.2 This standard does not purport to address all of the
through a folded filter paper.
safety concerns, if any, associated with its use. It is the
7.2 Discard the first 20 to 25 mL of the filtrate. Pipette 200
responsibility of the user of this standard to establish appro-
mL of the filtrate into a 600 mL beaker, add a few drops of
priate safety and health practices and determine the applica-
methyl orange indicator and neutralize with 5 % acetic acid to
bility of regulatory limitations prior to use.
an orange color. Add 2 to 3 mL of 5 % potassium chromate and
2. Referenced Documents titrate the solution with 0.1 N silver nitrate. Record the
millilitre of silver nitrate as A. Titrate 200 mL of distilled water
2.1 ASTM Standards:
containing a few drops of methyl orange indicator and 2 to 3
D 2813 Practice for Sampling Leather for Physical and
mL of 5 % potassium chromate with 0.1 N silver nitrate as a
Chemical Tests
blank and the millilitre of silver nitrate used and recorded as B.
3. Significance and Use
8. Calculation of Results
3.1 This test method is used to determine amount of soluble
8.1 Calculate the percent total chlorides as follows:
chlorides in leather.
total chlorides,% 5 ~A 2 B!N/W 3 0.0355 3 250/200 3 100 (1)
4. Apparatus
where:
4.1 Volumetric Flask, 250 mL.
A
= millilitres of standard silver nitrate used for titrating the
5. Reagents
sample,
5.1 Acetic Acid Solutions—5 or 10 % by volume.
B
5.2 Methyl Orange—0.02 % solution in 50 % alcohol.
= millilitres of standard silver nitrate used for titrating the
5.3 Ammonium Hydroxide Solution, (0.1 N).
blank,
5.4 Silver Nitrate, Standard Solution, (0.1 N).
N
5.5 Potassium Chromate Solution,5%.
= normality of the standard silver nitrate, and
W
6. Sampling, Test Specimens and Test Units
= weight of the specimen.
6.1 The test specimen shall consist of1gof leather from the
8.2 The total chlorides in the sample for test shall be the
composite sample in accordance with Practice D 2813.
average of the test result obtained f
...