ASTM D2351-90(2010)

Standard Test Method for Sulfide in White Pigment Separated from Solvent-Reducible Paints

SIGNIFICANCE AND USE
Sulfide containing pigments such as lithopone have been used in paints in varying degrees in the past years. As such it is useful to formulators and users to be able to monitor the amount of this compound in whole paints.
SCOPE
1.1 This test method covers the determination of sulfide sulfur in white pigment separated from solvent-reducible paints.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.

General Information

• Status: Historical
• Publication Date: 31-May-2010
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.21 - Chemical Analysis of Paints and Paint Materials

Relations

• Replaces: ASTM D2351-90(2005) - Standard Test Method for Sulfide in White Pigment Separated from Solvent-Reducible Paints
• Effective Date: 01-Jun-2010

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D2351 −90(Reapproved2010)
Standard Test Method for
Sulfide in White Pigment Separated from Solvent-Reducible
Paints
This standard is issued under the fixed designation D2351; 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 4. Significance and Use
1.1 This test method covers the determination of sulfide 4.1 Sulfidecontainingpigmentssuchaslithoponehavebeen
sulfur in white pigment separated from solvent-reducible used in paints in varying degrees in the past years. As such it
paints. is useful to formulators and users to be able to monitor the
amount of this compound in whole paints.
1.2 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
5. Reagents
standard.
5.1 Purity of Reagents—Reagent grade chemicals shall be
1.3 This standard does not purport to address all of the
used in all tests. Unless otherwise indicated, it is intended that
safety concerns, if any, associated with its use. It is the
all reagents shall conform to the specifications of the Commit-
responsibility of the user of this standard to establish appro-
tee onAnalytical Reagents of theAmerican Chemical Society,
priate safety and health practices and determine the applica-
where such specifications are available. Other grades may be
bility of regulatory limitations prior to use.
used, provided it is first ascertained that the reagent is of
sufficiently high purity to permit its use without lessening the
2. Referenced Documents
accuracy of the determination.
2.1 ASTM Standards:
5.2 Purity of Water—Unless otherwise indicated, references
D215 Practice for the Chemical Analysis of White Linseed
3 to water shall be understood to mean reagent grade water
Oil Paints (Withdrawn 2005)
conforming to Type II of Specification D1193.
D1193 Specification for Reagent Water
5.3 Ammoniacal Cadmium Chloride or Zinc Sulfate
D2371 Test Method for Pigment Content of Solvent-
Solution—Dissolve8gof cadmium chloride (CdCl ·2H O) in
Reducible Paints
2 2
200 mL of water and add 200 mL of ammonium hydroxide
(NH OH, sp gr 0.90); or, dissolve 200 g of zinc sulfate
3. Summary of Test Method
(ZnSO ·7H O) in 1080 mL of water and 920 mL of NH OH
4 2 4
3.1 The extracted pigment is placed in a flask with mossy
(sp gr 0.90).
zinc. The hydrogen sulfide generated by addition of HCl reacts
5.4 Hydrochloric Acid (sp gr 1.19)—Concentrated HCl.
with lead nitrate in an absorption flask forming lead sulfide.
The lead sulfide is dissolved with nitric acid (HNO ) and the
5.5 Lead Nitrate, Alkaline Solution— Into 100 mL of
lead determined as lead sulfate in accordance with Test
potassium hydroxide (KOH) solution (56 g in 140 mL of
Methods D215.
water) pour a saturated solution of lead nitrate (Pb(NO ) )
3 2
(250 g in 500 mL of water) until the precipitate ceases to
3.2 A rapid method is also described.
redissolve, stirring constantly while mixing. Let settle, filter
through a glass filter, and dilute the clear filtrate with an equal
volume of water. About 3 volumes of the Pb(NO ) solution
1 3 2
This test method is under the jurisdiction of ASTM Committee D01 on Paint
will be required for 1 volume of the KOH solution.
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.
5.6 Mossy Zinc.
Current edition approved June 1, 2010. Published June 2010. Originally
approved in 1965. Last previous edition approved in 2005 as D2351 – 90 (2005).
DOI: 10.1520/D2351-90R10.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Reagent Chemicals, American Chemical Society Specifications, American
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Chemical Society, Washington, DC. For suggestions on the testing of reagents not
Standards volume information, refer to the standard’s Document Summary page on listed by the American Chemical Society, see Analar Standards for Laboratory
the ASTM website. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
The last approved version of this historical standard is referenced on and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
www.astm.org. MD.
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D2351−90(2010)
5.7 Nitric Acid (1+4)—Mix 1 volume of concentrated 7. Procedure
HNO , (sp gr 1.42) with 4 volumes of water.
7.1 Place 0.5 to1gofthe pigment in a flask with about 10
5.8 Potassium Iodate, Standard Solution—Dissolve 3.6 g of
g of “feathered” or mossy zinc and add 50 mL of water; insert
potassium iodate (KIO ) and 39 g of potassium iodide (KI) in
a stopper carrying a separatory funnel and an exit tube. Run in
1Lofwater.Forgeneralworkthetheoreticalsulfurtiterofthis
50 mL of HCl (sp gr 1.19) from the funnel, having previously
solution should be used; for special work the solution may be
connected the ex
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