ASTM D6016-17

Standard Test Method for Determination of Nitrogen, Water Extractable in Leather

SIGNIFICANCE AND USE
3.1 This test method provides the means to determine nitrogen containing water extractable materials such as excess and loosely bound tannins, ammonium salts, and nitrates.
SCOPE
1.1 This test method covers quantitatively determining the water extractable nitrogen in 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.  
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: Historical
• Publication Date: 31-Mar-2017
• ICS: 59.140.30 - Leather and furs
• Technical Committee: D31 - Leather
• Drafting Committee: D31.06 - Chemical Analysis

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D6016 − 17
Standard Test Method for
1
Determination of Nitrogen, Water Extractable in Leather
This standard is issued under the fixed designation D6016; 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 3. Significance and Use
3.1 This test method provides the means to determine
1.1 This test method covers quantitatively determining the
nitrogen containing water extractable materials such as excess
water extractable nitrogen in leather.
and loosely bound tannins, ammonium salts, and nitrates.
1.2 The values stated in SI units are to be regarded as
4. Apparatus
standard. No other units of measurement are included in this
standard.
4.1 Volumetric Flask, 1 L.
1.3 This standard does not purport to address all of the
4.2 Kjeldahl Apparatus, see Test Method D2868.
safety concerns, if any, associated with its use. It is the
5. Reagents
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5.1 See Test Method D2868.
bility of regulatory limitations prior to use.
5.2 See Test Method D3495.
1.4 This international standard was developed in accor-
5.3 See Test Method D2876.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
6. Procedure
Development of International Standards, Guides and Recom-
6.1 Follow the procedure for Test Method D3495. Save
mendations issued by the World Trade Organization Technical
extracted leather and follow the procedure in 7.1 only of Test
Barriers to Trade (TBT) Committee.
Method D2876.
6.2 When 1 L has been collected, cool the litre flask with
2. Referenced Documents
contents to room temperature, readjusted up to 1 L with
2
2.1 ASTM Standards:
distilled water and mixed thoroughly. Transfer 500 mL of the
D2868 Test Method for Nitrogen Content (Kjeldahl) and
solution to an 800-mL Kjeldahl flask. If using automated
Hide Substance Content of Leather, Wet Blue and Wet
Kjeldahl instrumentation, sample size and quantity of reagents
White
may need adjustment. Add 8 g of digestion catalyst (see Test
D2876 Test Method for Water-Soluble Matter of Vegetable- Method D2868) and 20 mL of sulfuric acid (specific gravity
Tanned Leather 1.83) to the solution and the contents of the flask mixed
thoroughly.
D3495 Test Method for Hexane Extraction of Leather
D3790 Test Method for Volatile Matter (Moisture) of
6.3 Digest the mixture over a low heat source until all
Leather by Oven Drying
organic matter is oxidized as indicated by the end of foaming
and clearing of the solution. When foaming has ceased and the
solution has cleared, apply full heat to the mixture and continue
1
digestion for a minimum of 1 h. After digestion is complete,
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. This remove the flask from the heat, and allow to cool to room
test method was developed from Federal Test Method Standard
...

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: D6016 − 06 (Reapproved 2012) D6016 − 17
Standard Test Method for
1
Determination of Nitrogen, Water Extractable in Leather
This standard is issued under the fixed designation D6016; 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
1.1 This test method covers quantitatively determining the water extractable nitrogen in 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.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D2868 Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather, Wet Blue and Wet White
D2876 Test Method for Water-Soluble Matter of Vegetable-Tanned Leather
D3495 Test Method for Hexane Extraction of Leather
D3790 Test Method for Volatile Matter (Moisture) of Leather by Oven Drying
2.2 Federal Standard:
3
Federal Test Standard No. 311, Method 6452 Nitrogen, Water Extractable
3. Significance and Use
3.1 This test method provides the means to determine nitrogen containing water extractable materials such as excess and loosely
bound tannins, ammonium salts, and nitrates.
4. Apparatus
4.1 Volumetric Flask, 1 L.
4.2 Kjeldahl Apparatus, see Test Method D2868.
5. Reagents
5.1 See Test Method D2868.
5.2 See Test Method D3495.
5.3 See Test Method D2876.
6. Procedure
6.1 Follow the procedure for Test Method D3495. Save extracted leather and follow the procedure in 7.1 only of Test Method
D2876.
1
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. This test
method was developed from Federal Test Method Standard No. 311, Method 6452 in cooperation with the U.S. Army Natick Research Development & Engineering Center,
Natick MA and the Defense Personnel Support Center Directorate of Clothing and Textiles, Philadelphia PA.
Current edition approved April 1, 2012April 1, 2017. Published April 2012May 2017. Originally approved in 1996. Last previous edition approved in 20062012 as
D6016 – 06.D6016 – 06(2012). DOI: 10.1520/D6016-06R12.10.1520/D6016-17.
2
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volume information, refer to the standard’s Document Summary page on the ASTM website.
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