ASTM D4900-99(2020)
(Test Method)Standard Test Method for Lignosulfonates (Sulfite Cellulose) in Tanning Extracts
Standard Test Method for Lignosulfonates (Sulfite Cellulose) in Tanning Extracts
SIGNIFICANCE AND USE
4.1 This test method is useful to detect possible adulteration of tanning material extract with cheap and inferior lignosulfonates.
SCOPE
1.1 This test method is intended for use in detecting the presence of lignosulfonates (sulfite cellulose) in extracts of tanning materials.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 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
- 30-Nov-2020
- Technical Committee
- D31 - Leather
- Drafting Committee
- D31.01 - Vegetable Leather
Relations
- Effective Date
- 01-Apr-2009
- Effective Date
- 01-Apr-2009
- Refers
ASTM D6405-99(2009) - Standard Practice for Extraction of Tannins from Raw and Spent Materials - Effective Date
- 01-Apr-2009
- Effective Date
- 01-Apr-2009
- Effective Date
- 01-Apr-2004
- Effective Date
- 01-Apr-2004
- Refers
ASTM D6405-99(2004) - Standard Practice for Extraction of Tannins from Raw and Spent Materials - Effective Date
- 01-Apr-2004
- Effective Date
- 01-Apr-2004
- Effective Date
- 10-May-1999
- Effective Date
- 10-May-1999
- Effective Date
- 10-May-1999
- Refers
ASTM D4901-99 - Standard Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts - Effective Date
- 10-May-1999
Overview
ASTM D4900-99(2020): Standard Test Method for Lignosulfonates (Sulfite Cellulose) in Tanning Extracts provides an internationally recognized method for detecting the presence of lignosulfonates in extracts derived from tanning materials. The standard is crucial for the leather industry, enabling manufacturers, suppliers, and regulators to identify potential adulteration with cheap or inferior lignosulfonates, ensuring product quality and integrity. This test supports compliance with global trade requirements and aligns with the principles set by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Key Topics
- Detection of Lignosulfonates: The standard method specifies how to identify lignosulfonates (sulfite cellulose) added to tanning extracts, using a chemical reaction with aniline and hydrochloric acid to form a precipitate.
- Adulteration Prevention: By detecting the presence of lignosulfonates, which are often used as fillers due to their low cost, manufacturers can prevent economic fraud and maintain quality standards in leather production.
- Standardized Units: All measurements and results under this standard are reported in SI units, ensuring global consistency in data.
- Sampling and Preparation: The method includes detailed practices on sampling (referencing ASTM D6404) and solution preparation (ASTM D4901, D4905, and D6405) to support reliable and reproducible results.
- Interpretation of Results: Positive detection is indicated by the persistence of precipitate in the tested material compared to a control solution, warranting documentation of lignosulfonate presence in the analysis report.
- Limitations and Safety: Users are responsible for adhering to relevant safety, health, and environmental practices and considering any regulatory limitations in their locale.
Applications
- Leather Manufacturing: Ensures the authenticity and quality of tanning extracts used in vegetable tanning processes by detecting non-conforming additives.
- Quality Control Labs: Supports laboratories in verifying raw materials, intermediates, and final products for adulteration or compliance with buyer specifications.
- Regulatory Compliance: Aids organizations in complying with import, export, and consumer protection standards related to typical and acceptable composition of tanning materials.
- Research and Development: Provides a validated approach for R&D teams to evaluate new sources of tanning extracts and their potential adulteration or purity.
- Supplier Audits: Assists procurement and auditing teams in assessing the integrity of supplied tanning materials and extracts, sustaining traceability throughout the supply chain.
Related Standards
- ASTM D4901: Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts.
- ASTM D4905: Practice for Preparation of Solution of Solid, Pasty, and Powdered Vegetable Tannin Extracts.
- ASTM D6404: Practice for Sampling Vegetable Materials Containing Tannin.
- ASTM D6405: Practice for Extraction of Tannins from Raw and Spent Materials.
- ALCA Method A50: Historical method from the American Leather Chemists Association, upon which this ASTM method is based.
By following ASTM D4900-99(2020), stakeholders in the leather and tanning industry can confidently detect the presence of lignosulfonates in tanning extracts, guarding against adulteration and promoting fair trade. This standard is an essential tool for upholding quality, maintaining consumer trust, and fostering transparency in international leather commerce.
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Frequently Asked Questions
ASTM D4900-99(2020) is a standard published by ASTM International. Its full title is "Standard Test Method for Lignosulfonates (Sulfite Cellulose) in Tanning Extracts". This standard covers: SIGNIFICANCE AND USE 4.1 This test method is useful to detect possible adulteration of tanning material extract with cheap and inferior lignosulfonates. SCOPE 1.1 This test method is intended for use in detecting the presence of lignosulfonates (sulfite cellulose) in extracts of tanning materials. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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.
SIGNIFICANCE AND USE 4.1 This test method is useful to detect possible adulteration of tanning material extract with cheap and inferior lignosulfonates. SCOPE 1.1 This test method is intended for use in detecting the presence of lignosulfonates (sulfite cellulose) in extracts of tanning materials. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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.
ASTM D4900-99(2020) is classified under the following ICS (International Classification for Standards) categories: 59.140.10 - Processes and auxiliary materials. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM D4900-99(2020) has the following relationships with other standards: It is inter standard links to ASTM D6404-99(2009), ASTM D4901-99(2009), ASTM D6405-99(2009), ASTM D4905-99(2009), ASTM D4901-99(2004), ASTM D4905-99(2004), ASTM D6405-99(2004), ASTM D6404-99(2004), ASTM D6404-99, ASTM D6405-99, ASTM D4905-99, ASTM D4901-99. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM D4900-99(2020) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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: D4900 −99 (Reapproved 2020)
Standard Test Method for
Lignosulfonates (Sulfite Cellulose) in Tanning Extracts
This standard is issued under the fixed designation D4900; 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 2.2 ALCA Methods:
A50 Lignosulfonates (Sulfite Cellulose)
1.1 This test method is intended for use in detecting the
presence of lignosulfonates (sulfite cellulose) in extracts of
3. Summary of Test Method
tanning materials.
3.1 The reaction with aniline of a tanning material extract
1.2 The values stated in SI units are to be regarded as
specimen is compared with that of a solution containing
standard. No other units of measurement are included in this
lignosulfonate and tanning material known to be free from
standard.
lignosulfonate.
1.3 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 This test method is useful to detect possible adulteration
responsibility of the user of this standard to establish appro-
of tanning material extract with cheap and inferior lignosul-
priate safety, health, and environmental practices and deter-
fonates.
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
5. Specimen
dance with internationally recognized principles on standard-
5.1 The sample shall be drawn as described in Practice
ization established in the Decision on Principles for the
D6404.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5.2 The specimen shall consist of 5 mL of a solution of
Barriers to Trade (TBT) Committee.
analytical strength (4.0 g tannin per L), prepared as described
in Practices D4901, D4905, and Practice D6405.
2. Referenced Documents
6. Apparatus and Reagents
2.1 ASTM Standards:
6.1 Aniline.
D4901 Practice for Preparation of Solution of Liquid Veg-
etable Tannin Extracts
6.2 Hydrochloric Acid, concentrated.
D4905 Practice for Preparation of Solution of Solid, Pasty
6.3 ComparisonSolution—This shall contain lignosulfonate
and Powdered Vegetable Tannin Extracts
(sulfite cellulose) in the proportion of 1 g total solids to 2000
D6404 Practice for Sampling Vegetable Materials Contain-
mLof solution, and as much tanning material, similar to and of
ing Tannin
the same type as that being tested but known to be free from
D6405 Practice for Extraction of Tannins from Raw and
lignosulfonate, as will make up the solution to analytical
Spent Materials
strength.
7. Procedure
7.1 Place the specimen in a test tube.Add 0.5 mLof aniline,
and shake well. Add 2 mL of concentrated hydrochloric acid,
1 and again shake mixture well.
This test method is under the jurisdiction ofASTM Committee D31 on Leather
and is the direct responsibility of Subcommittee D31.01 on Vegetable Leather. This
test method h
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