ASTM D1832-04(2009)
(Test Method)Standard Test Method for Peroxide Number of Petroleum Wax (Withdrawn 2014)
Standard Test Method for Peroxide Number of Petroleum Wax (Withdrawn 2014)
SIGNIFICANCE AND USE
The magnitude of the peroxide number is an indication of the quantity of oxidizing constituents present. Deterioration of petroleum wax results in the formation of peroxides and other oxygen-carrying compounds. The peroxide number measures those compounds that will oxidize potassium iodide.
SCOPE
1.1 This test method covers the determination of the peroxide number of petroleum wax.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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.
WITHDRAWN RATIONALE
This test method covers the determination of the peroxide number of petroleum wax.
Formerly under the jurisdiction of Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants, this test method was withdrawn in May 2014 because it is believed to be no longer in use for product representation purposes.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D1832 − 04(Reapproved 2009) TAPPI Method T 659 wd-85
Standard Test Method for
Peroxide Number of Petroleum Wax
This standard is issued under the fixed designation D1832; 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 6. Reagents and Materials
1.1 This test method covers the determination of the perox- 6.1 Purity of Reagents—Reagent grade chemicals shall be
ide number of petroleum wax. used in all tests. Unless otherwise indicated, it is intended that
all reagents shall conform to the specifications of the Commit-
1.2 The values stated in inch-pound units are to be regarded
tee onAnalytical Reagents of theAmerican Chemical Society,
as standard. The values given in parentheses are mathematical
where such specifications are available. Other grades may be
conversions to SI units that are provided for information only
used, provided it is first ascertained that the reagent is of
and are not considered standard.
sufficiently high purity to permit its use without lessening the
1.3 This standard does not purport to address all of the
accuracy of the determination.
safety concerns, if any, associated with its use. It is the
6.2 Purity of Water—Unless otherwise indicated, references
responsibility of the user of this standard to establish appro-
to water shall be understood to mean distilled water or water of
priate safety and health practices and determine the applica-
equal purity.
bility of regulatory limitations prior to use.
6.3 Acetic Acid Solution—Mix 4 mLof concentrated hydro-
2. Terminology
chloric acid (HCl, sp gr 1.19) with 996 mL of ACS special
reagent grade glacial acetic acid (CH CO H). The acetic acid
2.1 Definitions: 3 2
must pass the ⁄2-h test for substances reducing K Cr O .
2 2 7
2.1.1 peroxide number—the milliequivalents of constituents
per 1000 g of wax that will oxidize potassium iodide.
6.4 Xylenes, (Warning—Flammable liquid. Vapor harm-
ful.) Treated to remove oxidizing impurities. One way to do
3. Summary of Test Method
this is to pass the xylenes through an activated alumina column
shortly prior to use.
3.1 A quantity of sample is dissolved in xylenes and
acidified with acetic acid solution. A solution of potassium
6.5 Potassium Dichromate, Standard Solution (0.1N)—
iodide is added and, after a reaction period, the solution is
Recrystallize potassium dichromate (K Cr O ) twice from an
2 2 7
titrated with sodium thiosulfate solution to the end point
aqueous solution and dry at about 325°F (164°C) to constant
indicated by the color change of added starch solution.
weight. Dissolve 2.452 g of the purified K Cr O in water and
2 2 7
dilute to 500 mL in a volumetric flask.
4. Significance and Use
6.6 Potassium Dichromate, Standard Solution (0.01N)—
4.1 The magnitude of the peroxide number is an indication
Dilute 100 mL of 0.1 N K Cr O solution with water to 1000
2 2 7
of the quantity of oxidizing constituents present. Deterioration
mL in a volumetric flask.
of petroleum wax results in the formation of peroxides and
6.7 Potassium Iodide Solution—Dissolve 120 g of potas-
other oxygen-carrying compounds. The peroxide number mea-
sium iodide (KI) in 100 mLof water. Discharge any color from
sures those compounds that will oxidize potassium iodide.
this solution as follows: put 1 mL of KI solution, 50 mL of
water, and 5 mL of starch solution in a 300-mL flask and
5. Apparatus
blanket with nitrogen or carbon dioxide. If a blue color
5.1 Iodine Flask, borosilicate glass, 250-mLcapacity, glass-
develops, add 0.005 N Na S O solution from a microburet
2 2 3
stoppered.
until color just disappears. Calculate and add sufficient
1 2
This test method is under the jurisdiction of the ASTM Committee D02 on Reagent Chemicals, American Chemical Society Specifications, American
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee Chemical Society, Washington, DC. For Suggestions on the testing of reagents not
D02.10.0A on Physical/Chemical Properties. listed by the American Chemical Society, see Annual Standards for Laboratory
Current edition approved Oct. 1, 2009. Published November 2009. Originally Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
approved in 1961. Last previous edition approved in 2004 as D1832–04. DOI: and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
10.1520/D1832-04R09. MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D1832 − 04(Reapproved 2009)
Na S O solution to the main KI solution to convert all free
2 2 3
D1832 − 04 (2009)
iodine to iodide. When starch solution is added to 1 mL of KI 7.3 Make a blank determination on the reagents. Proceed as
solution a blue color should not develop, but upon the addition directed in 7.1 and 7.2 except to omit the sample.
of 1 drop of 0.01 N K Cr O solution and 2 drops of
2 2 7
8. Calculation
concentrated hydrochloric
...
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