Standard Test Method for Moisture in Aerosol Products (Withdrawn 2000)

SCOPE
1.1 This test method covers the determination of moisture in aerosol products.  
1.2 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. A specific warning statement is given in Note 1.

General Information

Status
Withdrawn
Publication Date
31-Dec-1993
Withdrawal Date
09-Oct-2000
Technical Committee
Current Stage
Ref Project

Buy Standard

Standard
ASTM D3057-94 - Standard Test Method for Moisture in Aerosol Products (Withdrawn 2000)
English language
2 pages
sale 15% off
Preview
sale 15% off
Preview

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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: D 3057 – 94
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
1
Moisture in Aerosol Products
This standard is issued under the fixed designation D 3057; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope all reagents shall conform to the specifications of the Commit-
tee on Analytical Reagents of the American Chemical Society,
1.1 This test method covers the determination of moisture in
3
where such specifications are available. Other grades may be
aerosol products.
used, provided it is first ascertained that the reagent is of
1.2 This standard does not purport to address all of the
sufficiently high purity to permit its use without lessening the
safety concerns, if any, associated with its use. It is the
accuracy of the determination.
responsibility of the user of this standard to establish appro-
6.2 Purity of Water—Unless otherwise indicated, references
priate safety and health practices and determine the applica-
to water shall be understood to mean water conforming to
bility of regulatory limitations prior to use. A specific warning
Specification D 1193.
statement is given in Note 1.
6.3 Karl Fischer Reagent.
4
2. Referenced Documents
6.4 Methanol—Anhydrous methyl alcohol.
6.5 Methanol-Water Standard Solution.
2.1 ASTM Standards:
2
6.6 Sodium Tartrate Standard —(Na C H O ·2H O).
D 1193 Specification for Reagent Water 2 4 4 6 2
7. Sampling
3. Summary of Test Method
7.1 Obtain production made samples selected at random.
3.1 Moisture is determined in an aerosol product by back-
titrating the specimen, to which Karl Fischer reagent has been
8. Standardization
added, with a methanol-water solution. A ratio between the
8.1 Ratio of Karl Fischer Reagent to Methanol-Water Solu-
methanol and Karl Fischer reagent is obtained, and the Karl
tion:
Fischer reagent is standardized against sodium tartrate dihy-
8.1.1 Place approximately 60 mL of methanol into a closed
drate.
glass container, and add from 2 to 3 mL of Karl Fischer
4. Significance and Use
reagent. Agitate the solution with the magnetic stirrer for
approximately 5 min.
4.1 Moderate concentration of water in certain aerosol
8.1.2 Back-titrate the solution with the methanol-water
formulations can lead to metallic can corrosion.
solution until the end point is reached; then add 10 mL of Karl
NOTE 1—Warning: Contaminated primary alcohols with water levels
Fischer reagent. Back-titrate with the methanol-water soution
of 1 to 2 % can produce hydrogen gas in aluminum containers causing
until the end point is reached.
them to rupture.
8.1.3 Calculate the ratio of Karl Fischer reagent to
4.2 Ketones, such as acetone, can produce falsely high
methanol-water solution, X, as follows:
results.
X 5 A/B
5. Apparatus
where:
5.1 Closed Containers, glass, three.
A 5 Karl Fischer reagent used, mL, and
5.2 Stirrer, magnetic.
B 5 methanol-water solution used, mL.
6. Reagents
NOTE 2—A ratio close to 1 is recommended.
6.1 Purity of Reagents—Reagent grade chemicals shall be
8.2 Standardization of Karl Fischer Reagent:
used in all tests. Unless otherwise indicated, it is intended that
3
“Reagent Chemicals, American Chemical Society Specifications,” Am. Chemi-
1
cal Soc., Washington, DC. For suggestions on the testing of reagents not listed by
This test method is under the jurisdiction of ASTM Committee D-10 on
the American Chemical Society, see “Reagent Chemicals and Standards,” by Joseph
Packaging and is the direct responsibility of Subcommittee D10.32 on Consumer
Packages. Originally developed by the Chemical Specialties Manufacturers Assn. Rosin, D. Van Nostrand Co., Inc., New York, NY, and the “United States
Current edition approved Nov. 15, 1994. Published January 1995. Originally Pharmacopeia.”
1 4
published as D 3057 – 72. Last previous edition D 3057 – 80 (1986)e . Baker’s Analyzed Anhydrous Methanol (approximately 0.05 % water), avail-
2
Annual Book of ASTM Standards, Vol 11.01. able from Baker Chemical Co., has been found satisfactory for this method.
1

---------------------- Page: 1 ----------------------
D 3057
8.2.1 Place approximately 60 mL of methanol into a closed 10. Calculation
glass container and add from 2 to 3 mL of Karl Fischer reagent.
10.1 Calculate the water content (mass percent), M,as
Agitate the solution for 5 min with the magnetic stirrer.
follows:
8.2.2 Back-titrate the solution with the methanol-water
M 5 ~A 3 y
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.