ASTM D2087-22

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.
Designation: D2087 − 22
Standard Test Method for
Iron in Formaldehyde Solutions
This standard is issued under the fixed designation D2087; 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 3. Summary of Test Method
1.1 This test method covers the determination of the total 3.1 The specimen is evaporated and ashed; the iron, reduced
iron content of formaldehyde solutions. to the divalent state by the addition of hydroxylamine
hydrochloride, is reacted with o-phenanthroline to develop a
1.2 For purposes of determining conformance of an ob-
color that is measured at 510 nm.
served or a calculated value using this test method to relevant
specifications, test result(s) shall be rounded off “to the nearest
4. Significance and Use
unit” in the last right-hand digit used in expressing the
4.1 This test method provides a measurement of iron con-
specification limit, in accordance with the rounding-off method
tent of formaldehyde solutions. The results of these measure-
of Practice E29.
ments can be used for specification acceptance.
1.3 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this 5. Apparatus
standard.
5.1 Spectrophotometer, capable of measuring light absorp-
1.4 For hazard information and guidance, see the supplier’s tion at 510 nm.
Material Safety Data Sheet.
5.2 Absorption Cells, minimum light path, 10 mm.
1.5 This standard does not purport to address all of the
5.3 Evaporating Dishes, 90 mm diameter, high-silica glass.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Reagents and Materials
priate safety, health, and environmental practices and deter-
6.1 Purity of Reagents—Reagent grade chemicals shall be
mine the applicability of regulatory limitations prior to use.
used in all tests. Unless otherwise indicated, it is intended that
1.6 This international standard was developed in accor-
all reagents shall conform to the specifications of the Commit-
dance with internationally recognized principles on standard-
tee on Analytical Reagents of the American Chemical Society,
ization established in the Decision on Principles for the 3
where such specifications are available. Other grades may be
Development of International Standards, Guides and Recom-
used, provided it is first ascertained that the reagent is of
mendations issued by the World Trade Organization Technical
sufficiently high purity to permit its use without lessening the
Barriers to Trade (TBT) Committee.
accuracy of the determination.
6.2 Purity of Water—Unless otherwise indicated, references
2. Referenced Documents
to water shall be understood to mean reagent water as defined
2.1 ASTM Standards:
by Type IV of Specification D1193.
D1193 Specification for Reagent Water
6.3 Ammonium Acetate Solution (100 g ⁄L)—Dissolve 100 g
E29 Practice for Using Significant Digits in Test Data to
of ammonium acetate (NH C H O ) in 100 mL of water. Add
4 2 3 2
Determine Conformance with Specifications
200 mL of acetic acid (CH COOH), dilute to 1 L with water,
and mix.
6.4 Ammonium Hydroxide (1 + 1)—Mix equal volumes of
This test method is under the jurisdiction of ASTM Committee D01 on Paint
concentrated ammonium hydroxide (NH OH, sp gr 0.90) and
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.35 on Solvents, Plasticizers, and Chemical Intermediates.
water.
Current edition approved Jan. 1, 2022. Published January 2022. Originally
approved in 1962. Last previous edition approved in 2012 as D2087 – 06 (2012)
which was withdrawn January 2021 and reinstated in January 2022. DOI: 10.1520/ ACS Reagent Chemicals, Specifications and Procedures for Reagents and
D2087-22. Standard-Grade Reference Materials, American Chemical Society, Washington,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or DC. For suggestions on the testing of reagents not listed by theAmerican Chemical
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Society, see Analar Standards for Laboratory Chemicals, BDH Ltd., Poole, Dorset,
Standards volume information, refer to the standard’s Document Summary page on U.K., and the United States Pharmacopeia and National Formulary, U.S. Pharma-
the ASTM website. copeial Convention, Inc. (USPC), Rockville, MD.
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