ASTM D1613-96(1999)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn
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Designation: D 1613 – 96 (Reapproved 1999)
Standard Test Method for
Acidity in Volatile Solvents and Chemical Intermediates
Used in Paint, Varnish, Lacquer, and Related Products
This standard is issued under the fixed designation D1613; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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 decomposition during storage or distribution, or manufacture.
This test method may be used in assessing compliance with a
1.1 This test method covers the determination of total
specification.
acidity as acetic acid, in concentrations below 0.05%, in
organic compounds and hydrocarbon mixtures used in paint,
5. Apparatus
varnish, and lacquer solvents and diluents. It is known to be
5.1 Buret, 10-mL, graduated in 0.05-mL subdivisions.
applicable to such mixtures as low molecular weight saturated
5.2 Erlenmeyer Flask, 250-mL capacity.
and unsaturated alcohols, ketones, ethers, esters, hydrocarbon
diluents,naphtha,andotherlightdistillatepetroleumfractions.
6. Purity of Reagents
1.2 This standard does not purport to address the safety
6.1 Reagent grade chemicals shall be used in all tests.
concerns, if any, associated with its use. It is the responsibility
Unlessotherwiseindicated,itisintendedthatallreagentsshall
of whoever uses this standard to consult and establish appro-
conform to the specifications of the Committee on Analytical
priate safety and health practices and determine the applica-
Reagents of the American Chemical Society, where such
bility of regulatory limitations prior to use.
specifications are available. Other grades may be used pro-
1.3 For specific hazard information and guidance consult
vided it is first ascertained that the reagent is of sufficiently
supplier’s Material Safety Data Sheet.
high purity to permit its use without lessening the accuracy of
2. Referenced Documents the determination.
6.2 Unless otherwise indicated, references to water shall be
2.1 ASTM Standards:
understood to mean reagent water conforming to Type IV of
D770 Specification for Isopropyl Alcohol
3 Specification D1193.
D1193 Specification for Reagent Water
E200 Practice for Preparation, Standardization, and Stor-
7. Reagents
age of Standard and Reagent Solutions for Chemical
4 7.1 Alcohols, refined, ethyl or isopropyl.
Analysis
NOTE 1—Isopropyl alcohol (99% grade) conforming to Specification
3. Summary of Test Method
D770, or190 proof ethyl alcohol conforming to formula No. 3A of the
U.S.BureauofInternalRevenueissuitableforuseasthesolvent.Theuse
3.1 The specimen is mixed with either an equal volume of
of methyl alcohol is not recommended.
water or an equal volume of alcohol, and titrated with aqueous
sodium hydroxide solution to the phenolphthalein end point. 7.2 Phenolphthalein Indicator Solution,(10g/L)—Dissolve
1 g of phenolphthalein in ethyl or isopropyl alcohol (see Note
4. Significance and Use
1) and dilute to 100 mL with the alcohol.
4.1 This test method is useful for determining low levels of
7.3 Sodium Hydroxide, Standard Solution (0.05 N)—
acidity, below 0.05%, in organic compounds and hydrocarbon
Prepare and standardize a 0.05 N sodium hydroxide (NaOH)
mixtures. The total acidity is calculated as acetic acid or
solution (Note 2) in accordance with Sections 12 to 17 of
milligrams of sodium hydroxide per gram of sample.
Practice E200.
4.2 Acidity may be present as a result of contamination,
NOTE 2—Alternatively, KOH solution may be used.
This test method is under the jurisdiction of ASTM Committee D-1 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.35 on Solvents, Plasticizers, and Chemical Intermediates. Reagent Chemicals, American Chemical Society Specifications, American
Current edition approved May 10, 1996. Published July 1996. Originally Chemical Society, Washington, DC. For suggestions on the testing o
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