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ASTM D2959-95

(Test Method)

Standard Test Method for Ethylene Oxide Content of Polyethoxylated Nonionic Surfactants

Standard Test Method for Ethylene Oxide Content of Polyethoxylated Nonionic Surfactants

SCOPE
1.1 This test method covers the determination of ethylene oxide in polyethoxylated nonionic surfactants. It can also be used for compounds containing propylene oxide or any compounds (glycols and glycol and polyglycol ethers and esters) which form unstable 1,2-diiodides on reaction with hydriodic acid.  Note 1-Compounds in which the oxyalkylene group is connected to a nitrogen cannot be entirely decomposed. This can be used to determine the percent of an ethoxylated surfactant in a mixture, if the ethylene oxide content of the ethoxylated surfactant is known. Note 2-This method reports results as percent ethylene oxide. If this method is applied to unknown compounds or compositions, the analyst should be aware of the possible presence of material other than ethylene oxide. Note 3-For use on built syndet compositions the organic active ingredient must be isolated in accordance with Test Method D2358.
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. Material Safety Data Sheets are available for reagents and materials. Review them for hazards prior to usage.

General Information

Status
Historical
Publication Date
31-Dec-1994
Technical Committee
D12 - Soaps and Other Detergents
Drafting Committee
D12.12 - Analysis and Specifications of Soaps, Synthetics, Detergents and their Components
Current Stage
Ref Project

Relations

Replaced By
ASTM D2959-95(2003) - Standard Test Method for Ethylene Oxide Content of Polyethoxylated Nonionic Surfactants
Effective Date
15-Mar-1995
Referred By
ASTM D4252-89(2017) - Standard Test Methods for Chemical Analysis of Alcohol Ethoxylates and Alkylphenol Ethoxylates
Effective Date
01-Jan-1995

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ASTM D2959-95 - Standard Test Method for Ethylene Oxide Content of Polyethoxylated Nonionic SurfactantsASTM D2959-95 - Standard Test Method for Ethylene Oxide Content of Polyethoxylated Nonionic Surfactants
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ASTM D2959-95 - Standard Test Method for Ethylene Oxide Content of Polyethoxylated Nonionic Surfactants
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 2959 – 95
Standard Test Method for
Ethylene Oxide Content of Polyethoxylated Nonionic
Surfactants
This standard is issued under the fixed designation D 2959; 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
1.1 This test method covers the determination of ethylene
oxide in polyethoxylated nonionic surfactants. It can also be
used for compounds containing propylene oxide or any com-
pounds (glycols and glycol and polyglycol ethers and esters)
which form unstable 1,2-diiodides on reaction with hydriodic
3.2 The percent ethylene oxide is determined by measuring
acid.
the amount of free iodine formed, since one mole of iodine is
NOTE 1—Compounds in which the oxyalkylene group is connected to a
formed for each mole of ethylene oxide in the polyoxyalkylene
nitrogen cannot be entirely decomposed. This can be used to determine the
chain. The free iodine is titrated with a standard sodium
percent of an ethoxylated surfactant in a mixture, if the ethylene oxide
thiosulfate solution.
content of the ethoxylated surfactant is known.
NOTE 2—This method reports results as percent ethylene oxide. If this
4. Apparatus (Fig. 1)
method is applied to unknown compounds or compositions, the analyst
should be aware of the possible presence of material other than ethylene
4.1 Heat Sources, two. The source of heat should be an
oxide.
electric heater provided with a sliding rheostat or other means
NOTE 3—For use on built syndet compositions the organic active
of heat control.
ingredient must be isolated in accordance with Test Method D 2358.
4.2 Flasks, two, 100-mL, round bottom. Each flask should
1.2 This standard does not purport to address all of the
be equipped with a standard ground-glass joint to accommo-
safety concerns, if any, associated with its use. It is the
date a vertical condenser, and with a side arm through which
responsibility of the user of this standard to establish appro-
carbon dioxide can be passed to blanket the reaction mixture.
priate safety and health practices and determine the applica-
4.3 Condensers, two, with standard joints to fit the flasks.
bility of regulatory limitations prior to use. Material Safety
4.4 Gas Bubbler, filled with dibutyl phthalate.
Data Sheets are available for reagents and materials. Review
4.5 Buret, 50-mL, with 0.1-mL graduations.
them for hazards prior to usage.
4.6 Pipet, 5-mL.
2. Referenced Documents
5. Reagents
2.1 ASTM Standards:
5.1 Purity of Reagents—Reagent grade chemicals shall be
D 1193 Specification for Reagent Water
used in all tests. Unless otherwise indicated, it is intended that
D 2358 Test Method for Separation of Active Ingredient
all reagents shall conform to the specifications of the Commit-
from Surfactant and Syndet Compositions
tee on Analytical Reagents of the American Chemical Society,
where such specifications are available. Other grades may be
3. Summary of Test Method
used, provided it is first ascertained that the reagent is of
3.1 By cleaving nonionic surfactants containing polyethyl-
sufficiently high purity to permit its use without lessening the
ene oxide chains with hydriodic acid, the unstable 1,2-
accuracy of the determination.
diiodoethane is formed. This vicinal diiodide decomposes to
5.2 Purity of Water—Unless otherwise indicated, references
form ethylene and iodine.
to water shall be understood to mean Type III reagent water
conforming to Sections 1, 2, and 3 of Specification D 1193.
5.3 Carbon Dioxide or Nitrogen, cylinder gas.
This method is under the jurisdiction of ASTM Committee D-12 on Soaps and
Other Detergents and is the direct responsibility of Subcommittee D12.12 on
Reagent Chemicals, American Chemical Society Specifications, American
Analysis of Soaps and Synthetic Detergents.
Chemical Society, Washington, DC. For suggestions on the testing of reagents not
Current edition approved March 15, 1995. Published May 1995. Originally
listed by the American Chemical Society, see Analar Standards for Laboratory
published as D 2959 – 71 T. Last previous edition D 2959 – 89.
Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
Annual Book of ASTM Standards, Vol 11.01.
and National Formulary, U.S. Pharmaceutical Convention, Inc. (USPC), Rockville,
Annual Book of ASTM Standards, Vol 15.04.
MD.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D 2959
where:
N 5 normality of the Na S O solution,
2 2 3
C 5 grams of K Cr O used, and
2 2 7
D 5 millilitres of Na S O solution required for titration of
2 2 3
the solution.
5.13 Starch Indicator Solution—Make a homogeneous
paste of 10 g of soluble starch in water. To this add with rapid
stirring 1 L of boiling water and then cool. As a preservative,
add 1.25 g of salicylic acid per litre. Store the indicator in a
refrigerator at 4 to 10°C. Prepare fresh indicator when the
titration end point from blue to colorless fails to be sharp.
6. Procedure
6.1 Assemble the apparatus as shown in Fig. 1. Lubricate
the ground-glass joints with a very thin film of lubricant. The
dual apparatus is designed to permit a sample and a blank to be
run simultaneously; however, it should not be necessary to
make more than two blank determinations each day.
6.2 Accurately weigh a sample of such size that 4 to 5 meq
of iodine will be liberated (about 0.15 g of a nonionic
surfactant that contains 60 % ethylene oxide) into a 100-mL
round bottom flask. Pipet exactly 5.0 mL of HI into the flask,
and add a glass bead. Connect the vertical condenser to the
FIG. 1 Apparatus
flask using a thin seal of lubricant at the outer edge. Prepare a
blank by pipetting 5.0 mL of HI into a sec
...

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SCOPE
1.1 This specification covers coated glass mat water-resistant gypsum backing panel designed for use on ceilings and walls in bath and shower areas as a base for the application of ceramic or plastic tile.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. Within the text, the SI units are shown in brackets.  
1.3 The text of this standard references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Technical specification
    3 pages
    English language
    sale 15% off
  • Technical specification
    3 pages
    English language
    sale 15% off