ASTM D7674-14a

Standard Test Method for Hexane/Petroleum Ether Extract in Wet Blue and Wet White

SIGNIFICANCE AND USE
4.1 This test method measures the amount of solvent-soluble (hexane or petroleum ether) materials in wet blue and wet white.
SCOPE
1.1 This test method covers the quantitative extraction of all types of wet blue and wet white with hexane or petroleum ether.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
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. For a specific hazard statement, see Section 7.

General Information

• Status: Historical
• Publication Date: 30-Apr-2014
• ICS: 59.140.30 - Leather and furs
• Technical Committee: D31 - Leather
• Drafting Committee: D31.02 - Wet Blue

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D7674 − 14a
Standard Test Method for
1
Hexane/Petroleum Ether Extract in Wet Blue and Wet White
This standard is issued under the fixed designation D7674; 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 dried, then cooled and weighed. The extract is reported as
extractables on a moisture-free basis.
1.1 This test method covers the quantitative extraction of all
types of wet blue and wet white with hexane or petroleum
4. Significance and Use
ether.
4.1 This test method measures the amount of solvent-
1.2 The values stated in SI units are to be regarded as the
soluble (hexane or petroleum ether) materials in wet blue and
standard. The values given in parentheses are for information
wet white.
only.
5. Apparatus
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5.1 Analytical Balance.
responsibility of the user of this standard to establish appro-
5.2 Extraction Apparatus—Soxhlet, consisting of a boiling
priate safety and health practices and determine the applica-
flask, extraction tube, and condenser. Alternate Extraction
bility of regulatory limitations prior to use. For a specific
Apparatus: Soxtec-type system consisting of an extraction unit
hazard statement, see Section 7.
and a control unit.
5.3 ForcedCirculatingAirOven,capableofmaintainingthe
2. Referenced Documents
specified temperature.
2
2.1 ASTM Standards:
5.4 Electric Hot Plate (or steam bath).
D3495 Test Method for Hexane Extraction of Leather
D6658 Test Method for Volatile Matter (Moisture) of Wet
5.5 Extraction Thimbles, fat-free: cellulose,Alundum, glass
Blue by Oven Drying
microfiber, or fritted glass.
D6659 Practice for Sampling and Preparation of Wet Blue
5.6 Absorbent Cotton, fat-free, or glass wool.
for Physical and Chemical Tests
E177 Practice for Use of the Terms Precision and Bias in
6. Reagents and Materials
ASTM Test Methods
6.1 Hexane, ACS Reagent Grade, or
E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method 6.2 Petroleum Ether, ACS Reagent Grade.
7. Hazards
3. Summary of Test Method
7.1 All reagents and chemicals should be handled with care.
3.1 A specimen is analyzed as received in wet state, diced;
Before using any chemical, read and follow all safety precau-
or pre-dried at the determined setting then ground prior to
tions and instructions on the manufacturers’ label or MSDS
analysis. The prepared specimen is extracted with solvent.
(Material Safety Data Sheet).
Another specimen from the same sample is also analyzed for
moisture content in accordance with Test Method D6658.
8. Sampling
Following completion of the extraction process, the extract is
8.1 The wet blue or wet white shall be sampled in accor-
dance with Test Method D6659.
1
This test method is under the jurisdiction ofASTM Committee D31 on Leather
9. Procedure
and is the direct responsibility of Subcommittee D31.02 on Wet Blue.
NOTE 1—Two sample conditions are listed below. Both sample condi-
Current edition approved May 1, 2014. Published June 2014. Originally
tions produce acceptable results (See Precision and Bias section).
approved in 2010 as E7674-10. Last previous edition approved in 2014 as
E7674-14. DOI: 10.1520/D7674-14A.
9.1 Condition A—As received in wet state, diced (prepared
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
per Test Method D6659 Method A).
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
9.1.1 Weigh out specimen for both moisture and hexane/
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. petroleum ether extraction at the same time. For the hexane/
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7674 − 14a
petroleum ether extraction, weigh an 8-10 g specimen to the press the Air button and pull air through the cups for 10-15
nearest 0.001g and record this value as W1. Loosely pack the min. Close the Evaporation valve and release the extraction
material in an appropriately sized extraction thimble and cover cups with the safety catch. Dry the cups in a forced air
with a pad of fat-free cotton or glass wool. Proceed with circulating oven at 100 6 2°C (212 6 3.6°F) for 60-65 min or
extractionusingeithertheSoxhletapparatusortheSoxtec-type 25-30 min at 125 6 1°C (257 6 1.8°F). Cool the cups for
apparatus. 30-35 min (or to room temperature) in a desiccator. Continue
9.1.2 Determine th
...

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: D7674 − 14 D7674 − 14a
Standard Test Method for
1
Hexane/Petroleum Ether Extract in Wet Blue and Wet White
This standard is issued under the fixed designation D7674; 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 the quantitative extraction of all types of wet blue and wet white with hexane or petroleum ether.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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. For a specific hazard statement, see Section 7.
2. Referenced Documents
2
2.1 ASTM Standards:
D3495 Test Method for Hexane Extraction of Leather
D6658 Test Method for Volatile Matter (Moisture) of Wet Blue by Oven Drying
D6659 Practice for Sampling and Preparation of Wet Blue for Physical and Chemical Tests
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
3. Summary of Test Method
3.1 A specimen is analyzed as received in wet state, diced; or pre-dried at the determined setting then ground prior to analysis.
The prepared specimen is extracted with solvent. Another specimen from the same sample is also analyzed for moisture content
in accordance with Test Method D6658. Following completion of the extraction process, the extract is dried, then cooled and
weighed. The extract is reported as extractables on a moisture-free basis.
4. Significance and Use
4.1 This test method measures the amount of solvent-soluble (hexane or petroleum ether) materials in wet blue and wet white.
5. Apparatus
5.1 Analytical Balance.
5.2 Extraction Apparatus—Soxhlet, consisting of a boiling flask, extraction tube, and condenser. Alternate Extraction
Apparatus: Soxtec-type system consisting of an extraction unit and a control unit.
5.3 Forced Circulating Air Oven, capable of maintaining the specified temperature.
5.4 Electric Hot Plate (or steam bath).
5.5 Extraction Thimbles, fat-free: cellulose, Alundum, glass microfiber, or fritted glass.
5.6 Absorbent Cotton, fat-free, or glass wool.
6. Reagents and Materials
6.1 Hexane, ACS Reagent Grade, or
6.2 Petroleum Ether, ACS Reagent Grade.
1
This test method is under the jurisdiction of ASTM Committee D31 on Leather and is the direct responsibility of Subcommittee D31.02 on Wet Blue.
Current edition approved April 1, 2014May 1, 2014. Published June 2014. Originally approved in 2010 as E7674-10. Last previous edition approved in 2014 as E7674-14.
DOI: 10.1520/D7674-14.10.1520/D7674-14A.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7674 − 14a
7. Hazards
7.1 All reagents and chemicals should be handled with care. Before using any chemical, read and follow all safety precautions
and instructions on the manufacturers’ label or MSDS (Material Safety Data Sheet).
8. Sampling
8.1 The wet blue or wet white shall be sampled in accordance with Test Method D6659.
9. Procedure
NOTE 1—Two sample conditions are listed below. Both sample conditions produce acceptable results (See Precision and Bias section).
9.1 Condition A—As received in wet state, diced (prepared per Test Method D6659 Method A).
9.1.1 Weigh out specimen for both moisture and hexane/petroleum ether extraction at the same time. For the hexane/petroleum
ether extraction, weigh an 8-10 g specimen to the nearest 0.001g and record this value as W1. Loosely pack the material in an
appropriately sized extraction thimble and cover with a pad of fat-free cotton or glass wool. Proceed with extraction using either
the Soxhlet apparatus or th
...