1、Designation: D6016 06 (Reapproved 2012)D6016 17Standard Test Method forDetermination of Nitrogen, Water Extractable in Leather1This standard is issued under the fixed designation D6016; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisio
2、n, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers quantitatively determining the water extractable nitrogen in leather.1.2 The va
3、lues 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 responsibilityof the user of this standard to establish appropriate
4、 safety and health practices and determine the applicability of regulatorylimitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International S
5、tandards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D2868 Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather, Wet Blue and Wet WhiteD2876 Test Method for Water
6、-Soluble Matter of Vegetable-Tanned LeatherD3495 Test Method for Hexane Extraction of LeatherD3790 Test Method for Volatile Matter (Moisture) of Leather by Oven Drying2.2 Federal Standard:Federal Test Standard No. 311, Method 6452 Nitrogen, Water Extractable33. Significance and Use3.1 This test meth
7、od provides the means to determine nitrogen containing water extractable materials such as excess and looselybound tannins, ammonium salts, and nitrates.4. Apparatus4.1 Volumetric Flask, 1 L.4.2 Kjeldahl Apparatus, see Test Method D2868.5. Reagents5.1 See Test Method D2868.5.2 See Test Method D3495.
8、5.3 See Test Method D2876.6. Procedure6.1 Follow the procedure for Test Method D3495. Save extracted leather and follow the procedure in 7.1 only of Test MethodD2876.1 This test method is under the jurisdiction of ASTM Committee D31 on Leather and is the direct responsibility of Subcommittee D31.06
9、on Chemical Analysis. This testmethod was developed from Federal Test Method Standard No. 311, Method 6452 in cooperation with the U.S. Army Natick Research Development leather; nitrates; nitrogen; tannins; water absorption; water extractableASTM International takes no position respecting the validi
10、ty of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subjec
11、t to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarter
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