ASTM D6407-99(2014)

Standard Test Method for Analysis of Iron and Copper in Vegetable Tanning Materials

SIGNIFICANCE AND USE
4.1 This test method is used to determine the quantity of iron and copper present in vegetable tanning materials or vegetable tannin extracts prepared using Practices D4901, D6404, or D6405.  
4.2 Because of the possibility of errors in this test method it is essential that the method be followed exactly in order to obtain reproducible results both among specimens within a laboratory and for analyses between laboratories.
SCOPE
1.1 This test method is intended for use in determining iron and copper content in vegetable tanning materials. This test method is applicable to liquid, solid, pasty and powdered extracts, to raw and spent materials, and to tannery liquors.  
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.

General Information

• Status: Historical
• Publication Date: 31-Oct-2014
• ICS: 59.140.10 - Processes and auxiliary materials
• Technical Committee: D31 - Leather
• Drafting Committee: D31.01 - Vegetable Leather

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D6407 − 99 (Reapproved 2014)
Standard Test Method for
1
Analysis of Iron and Copper in Vegetable Tanning Materials
This standard is issued under the fixed designation D6407; 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 4. Significance and Use
1.1 This test method is intended for use in determining iron 4.1 This test method is used to determine the quantity of
and copper content in vegetable tanning materials. This test
iron and copper present in vegetable tanning materials or
method is applicable to liquid, solid, pasty and powdered
vegetable tannin extracts prepared using Practices D4901,
extracts, to raw and spent materials, and to tannery liquors.
D6404,or D6405.
1.2 The values stated in SI units are to be regarded as
4.2 Because of the possibility of errors in this test method it
standard. No other units of measurement are included in this
is essential that the method be followed exactly in order to
standard.
obtain reproducible results both among specimens within a
laboratory and for analyses between laboratories.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Apparatus and Reagents
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5.1 Sulfuric Acid, concentrated (96 %).
bility of regulatory limitations prior to use.
5.2 Sulfuric Acid Solution, diluted 1:20 with distilled water.
2. Referenced Documents
5.3 Nitric Acid, fuming.
2
2.1 ASTM Standards:
5.4 Hydrochloric Acid, concentrated (36 %).
D4901 Practice for Preparation of Solution of Liquid Veg-
5.5 Hydrochloric Acid Solution, 0.1 N.
etable Tannin Extracts
D4902 Test Method for Evaporation and Drying of Analyti-
5.6 Bromine Water, saturated solution.
cal Solutions
5.7 Ammonium Hydroxide Solution, concentrated diluted
D6404 Practice for Sampling Vegetable Materials Contain-
1:1 with distilled water.
ing Tannin
D6405 Practice for Extraction of Tannins from Raw and
5.8 Potassium Permanganate Solution, 0.1 N.
Spent Materials
5.9 Potassium (or Ammonium) Thiocyanate Solution, 10 g
2.2 ALCA Methods:
shall be dissolved in distilled water and diluted to 100 mLwith
3
A31 Method for Copper and Iron in Tanning Materials
distilled water.
3. Summary of Test Method 5.10 Stock Iron Solution, This may be a purchased iron
standard solution or may be prepared as follows:
3.1 A specified quantity of the tanning material is analyzed
5.10.1 0.70 g of crystallized ferrous ammonium sulfate
for iron and copper and content.
[FeSO ·(NH ) SO ·6H O] shall be dissolved in 50 mL of
4 4 2 4 2
distilled water and 20 mL of dilute sulfuric acid (diluted 1:4).
1
This test method is under the jurisdiction ofASTM Committee D31 on Leather
5.10.2 This solution shall be titrated with 0.1 N potassium
and is the direct responsibility of Subcommittee D31.01 on Vegetable Leather. This
permanganate solution until a faint pink persists for 1 minute
test method has been adapted from and is a replacement for Method A31 of the
and the iron is completely oxidized.
Official Methods of the American Leather Chemists Association.
Current edition approved Nov. 1, 2014. Published December 2014. Originally 5.10.3 Dilute this solution to 1 L with distilled water. 1 mL
approved in 1999. Last previous edition approved in 2009 as D6407 – 99 (2009).
of this solution is equivalent to 0.0001 g Fe.This solution shall
DOI: 10.1520/D6407-99R14.
be stored in brown bottles and be protected from light.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.10.4 Standard Iron Solution, 10 mL of the prepared stock
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
solution, or its equivalent of purchased iron standard solution,
the ASTM website.
shall be diluted to 100 mL with distilled water. 1 mL of this
3
Official Methods of the American Leather Chemists Association. Available
standard solution is equivalent to 0.00001 g Fe. The standard
from the American Leather Chemists Association, University of Cincinnati, P.O.
Box 210014, Cincinnati, OH 45221-0014. solution shall be freshly prepared for each analysis.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6407 − 99 (2014)
5.11 Stock Copper Solution, 3.9283 g of copper sulfate 7.4 Duplicate determinations are recommended whenever
crystals (CuSO
...

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: D6407 − 99 (Reapproved 2009) D6407 − 99 (Reapproved 2014)
Standard Test Method for
1
Analysis of Iron and Copper in Vegetable Tanning Materials
This standard is issued under the fixed designation D6407; 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 is intended for use in determining iron and copper content in vegetable tanning materials. This test method
is applicable to liquid, solid, pasty and powdered extracts, to raw and spent materials, and to tannery liquors.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D4901 Practice for Preparation of Solution of Liquid Vegetable Tannin Extracts
D4902 Test Method for Evaporation and Drying of Analytical Solutions
D6404 Practice for Sampling Vegetable Materials Containing Tannin
D6405 Practice for Extraction of Tannins from Raw and Spent Materials
2.2 ALCA Methods:
3
A31 Method for Copper and Iron in Tanning Materials
3. Summary of Test Method
3.1 A specified quantity of the tanning material is analyzed for iron and copper and content.
4. Significance and Use
4.1 This test method is used to determine the quantity of iron and copper present in vegetable tanning materials or vegetable
tannin extracts prepared using Practices D4901, D6404, or D6405.
4.2 Because of the possibility of errors in this test method it is essential that the method be followed exactly in order to obtain
reproducible results both among specimens within a laboratory and for analyses between laboratories.
5. Apparatus and Reagents
5.1 Sulfuric Acid, concentrated (96 %).
5.2 Sulfuric Acid Solution, diluted 1:20 with distilled water.
5.3 Nitric Acid, fuming.
5.4 Hydrochloric Acid, concentrated (36 %).
5.5 Hydrochloric Acid Solution, 0.1 N.
5.6 Bromine Water, saturated solution.
1
This test method is under the jurisdiction of ASTM Committee D31 on Leather and is the direct responsibility of Subcommittee D31.01 on Vegetable Leather. This test
method has been adapted from and is a replacement for Method A31 of the Official Methods of the American Leather Chemists Association.
Current edition approved April 1, 2009Nov. 1, 2014. Published July 2009December 2014. Originally approved in 1999. Last previous edition approved in 20042009 as
D6407 – 99 (2004).(2009). DOI: 10.1520/D6407-99R09.10.1520/D6407-99R14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Official Methods of the American Leather Chemists Association. Available from the American Leather Chemists Association, University of Cincinnati, P.O. Box 210014,
Cincinnati, OH 45221-0014.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6407 − 99 (2014)
5.7 Ammonium Hydroxide Solution, concentrated diluted 1:1 with distilled water.
5.8 Potassium Permanganate Solution, 0.1 N.
5.9 Potassium (or Ammonium) Thiocyanate Solution, 10 g shall be dissolved in distilled water and diluted to 100 mL with
distilled water.
5.10 Stock Iron Solution, This may be a purchased iron standard solution or may be prepared as follows:
5.10.1 0.70 g of crystallized ferrous ammonium sulfate [FeSO •(NH·(NH ) SO •6H·6H O] shall be dissolved in 50 mL of
4 4 2 4 2
distilled water and 20 mL of dilute sulfuric acid (diluted 1:4).
5.10.2 This solution shall be titrated with 0.1 N potassium permanganate solution until a faint pink persists for 1 minute and
the iron is completely oxidized.
5.10.3 Dilute this solution to 1 L with distilled water. 1 mL of this solution is equivalent to 0.0001 g Fe. This solution shall be
stored in brown bottles and be protected from light.
5.10.4 Standard Iron Solution, 10 mL of the prepared stock solut
...