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ASTM D6016-96(2001)

(Test Method)

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

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

SCOPE
1.1 This test method covers quantitatively determining the water extractable nitrogen in leather.  
1.2 The values given in SI units are to be regarded as the 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.

General Information

Status
Historical
Publication Date
09-Oct-1996
ICS
59.140.30 - Leather and furs
Technical Committee
D31 - Leather
Drafting Committee
D31.06 - Chemical Analysis
Current Stage
Ref Project

Relations

Replaces
ASTM D6016-96 - Standard Test Method for Determination of Nitrogen, Water Extractable in Leather
Effective Date
10-Oct-1996
Replaced By
ASTM D6016-06 - Standard Test Method for Determination of Nitrogen, Water Extractable in Leather
Effective Date
01-Oct-2006

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ASTM D6016-96(2001) - Standard Test Method for Determination of Nitrogen, Water Extractable in LeatherASTM D6016-96(2001) - Standard Test Method for Determination of Nitrogen, Water Extractable in Leather
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ASTM D6016-96(2001) - Standard Test Method for Determination of Nitrogen, Water Extractable in Leather
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D6016–96 (Reapproved 2001)
Standard Test Method for
Determination of Nitrogen, Water Extractable in Leather
This standard is issued under the fixed designation D 6016; 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 5. Reagents
1.1 This test method covers quantitatively determining the 5.1 See Test Method D 2868.
water extractable nitrogen in leather. 5.2 See Test Method D 3495.
1.2 The values given in SI units are to be regarded as the 5.3 See Test Method D 2876.
standard.
6. Procedure
1.3 This standard does not purport to address all of the
6.1 Follow the procedure for Test Method D 3495. Save
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- extracted leather and follow the procedure in 7.1 only of Test
Method D 2876.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 6.2 When 1 L has been collected, cool the litre flask with
contents to room temperature, readjusted up to 1 L with
2. Referenced Documents
distilled water and mixed thoroughly. Transfer 500 mL of the
2.1 ASTM Standards: solution to an 800-mL Kjeldahl flask. Add8gof digestion
D 2868 Test Method for Nitrogen Content (Kjeldahl) and catalyst (see Test Method D 2868) and 20 mL of sulfuric acid
Hide Substance Content of Leather (specific gravity 1.83) to the solution and the contents of the
D 2876 TestMethodforWater-SolubleMatterofVegetable- flask mixed thoroughly.
Tanned Leather 6.3 Digest the mixture over a low heat source until all
D 3495 Test Method for Hexane Extraction of Leather organic matter is oxidized as indicated by the end of foaming
D 3790 Test Method for Volatile Matter (Moisture) of and clearing of the solution. When foaming has ceased and the
Leather by Oven Drying solutionhascleared,applyfullheattothemixtureandcontinue
2.2 Federal Standard: digestion for a minimum of 1 h. After digestion is complete,
Federal Test Standard No. 311, Method 6452 Nitrogen, remove the flask from the heat, and allow to cool to room
Water Extractable temperature.Thenadd25mLof8 %sodiumthiosulfateandset
aside the flask for 5 to 10 min with occasional stirring.
3. Significance and Use
6.4 Follow distillation and titration procedure in 7.3 of Test
3.1 This test method provides the means to determine Method D 2868.
nitrogen containing water extractable materials such as excess
7. Calculation
and loosely bound tannins, ammonium salts, and nitrates.
7.1 Calculate the water extractable nitrogen in the specimen
4. Apparatus
as follows:
...

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