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ASTM D4654-87(2020)

(Test Method)

Standard Test Method for Sulfate Basicity in Leather

Standard Test Method for Sulfate Basicity in Leather

SIGNIFICANCE AND USE
3.1 This test method is used to determine the percent of total chromic oxide that is combined with hydroxyl and may serve as a measure of chrome fixation.
SCOPE
1.1 This test method is intended for use in calculating the sulfate basicity of mineral tanned leather.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-Mar-2020
ICS
59.140.30 - Leather and furs
Technical Committee
D31 - Leather
Drafting Committee
D31.06 - Chemical Analysis
Current Stage
Ref Project

Relations

Replaces
ASTM D4654-87(2015) - Standard Test Method for Sulfate Basicity in Leather
Effective Date
01-Apr-2020
Refers
ASTM D2807-17a - Standard Test Method for Chromic Oxide in Leather (Perchloric Acid Oxidation)
Effective Date
01-Sep-2017
Refers
ASTM D2807-17 - Standard Test Method for Chromic Oxide in Leather (Perchloric Acid Oxidation)
Effective Date
01-Apr-2017
Refers
ASTM D2807-93(2015) - Standard Test Method for Chromic Oxide in Leather (Perchloric Acid Oxidation)
Effective Date
01-Sep-2015
Refers
ASTM D4655-95(2012) - Standard Test Methods for Sulfates in Leather (Total, Neutral, and Combined Acid)
Effective Date
01-Apr-2012
Refers
ASTM D2807-93(2009)e1 - Standard Test Method for Chromic Oxide in Leather (Perchloric Acid Oxidation)
Effective Date
01-Apr-2009
Refers
ASTM D2807-93(2009) - Standard Test Method for Chromic Oxide in Leather (Perchloric Acid Oxidation)
Effective Date
01-Apr-2009
Refers
ASTM D4655-95(2006) - Standard Test Methods for Sulfates in Leather (Total, Neutral, and Combined Acid)
Effective Date
01-Oct-2006
Refers
ASTM D2807-93(2003) - Standard Test Method for Chromic Oxide in Leather (Perchloric Acid Oxidation)
Effective Date
10-May-2003
Refers
ASTM D2807-93(1998) - Standard Test Method for Chromic Oxide in Leather (Perchloric Acid Oxidation)
Effective Date
10-Jan-1998
Refers
ASTM D4655-95(2001) - Standard Test Methods for Sulfates in Leather (Total, Neutral, and Combined Acid)
Effective Date
15-May-1995
Refers
ASTM D4655-95 - Standard Test Methods for Sulfates in Leather (Total, Neutral, and Combined Acid)
Effective Date
15-May-1995
Referred By
ASTM D4655-95(2023) - Standard Test Methods for Sulfates in Leather (Total, Neutral, and Combined Acid)
Effective Date
01-Apr-2020

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ASTM D4654-87(2020) - Standard Test Method for Sulfate Basicity in LeatherASTM D4654-87(2020) - Standard Test Method for Sulfate Basicity in Leather
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ASTM D4654-87(2020) - Standard Test Method for Sulfate Basicity in Leather
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Standards Content (Sample)


This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D4654 − 87 (Reapproved 2020)
Standard Test Method for
Sulfate Basicity in Leather
This standard is issued under the fixed designation D4654; 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 5.2 Unless otherwise specified in the detail specifications,
two specimens from the composite sample shall be tested.
1.1 This test method is intended for use in calculating the
sulfate basicity of mineral tanned leather.
5.3 The percent basicity of the sample for test shall be the
1.2 This standard does not purport to address all of the
average of the test results obtained from the specimens tested.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Procedure
priate safety, health, and environmental practices and deter-
6.1 The chromic oxide shall be determined as described in
mine the applicability of regulatory limitations prior to use.
TestMethodD2807.Thecombinedsulfateshallbedetermined
1.3 This international standard was developed in accor-
as described in Method D4655.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
7. Calculation of Results
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
7.1 Express the percent basicity of the specimen according
Barriers to Trade (TBT) Committee.
toSchorlemmer’ssystem.Inthissystem,thepercentbasicityis
the percent of the total chromic oxide that is combined with
2. Referenced Documents
hydroxyl. Conversely, the percent acidity is the percent of the
2.1 ASTM Standards:
total chromic acid that is combined with sulfate or other acid
D2807Test Method for Chromic Oxide in Leather (Perchlo-
anions. Percent basicity is therefore 100% acidity.
ric Acid Oxidation)
sulfatebasicity,% 5 100 2 % combinedsulfate
D4655Test Methods for Sulfates in Leather (Total, Neutral,
and Combined Acid)
352.8/% totalchromicoxide (1)
3. Significance and Use
7.2 When other metals that form hydrolysable sulfates are
present, add their equivalent percent of chromic oxide to the
3.1 Thistestmethodisusedtodeterminethepercentoftotal
chromic oxide present before calculating percent basicity. Use
chromic oxide that is combined with hydroxyl and may serve
the following conversion factors: % Al O × 1.49, %
as a measure of chrome fixation. 2 3
ZrO ×0.82, and% Fe O ×0.95.
2 2 3
4. Apparatus and Reagents
7.3 Report the results to the nearest 0.1
...

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