ASTM D126-87(2002)
(Test Method)Standard Test Methods for Analysis of Yellow, Orange, and Green Pigments Containing Lead Chromate and Chromium Oxide Green
Standard Test Methods for Analysis of Yellow, Orange, and Green Pigments Containing Lead Chromate and Chromium Oxide Green
SCOPE
1.1 These test methods cover procedures for the chemical analysis of yellow, orange, and green pigments containing lead chromate and chromium oxide green.
1.2 The analytical procedures appear in the following order:SectionsChrome Yellow, Chrome Orange, and Molybdate O rangeOrganic Colors and Lakes7Moisture and Other Volatile Matter8Matter Soluble in Water9Lead Chromate10 and 11Total Lead12Sulfate13 and 14Carbon Dioxide15Molybdenum16 and 17Extenders18-22Calculation of Substances Other than Insoluble Lead Compounds23 and 24Pure Chrome Green and Reduced Chrome G reenOrganic Colors and Lakes25Moisture and Other Volatile Matter26Matter Soluble in Water27Iron Blue28Lead Chromate29 and 30Barium Sulfate and Insoluble Siliceous Material31Total Lead32Sulfate33Calcium Oxide Soluble in Acid34 and 35Extenders36Calculation of Insoluble Lead Com-pounds37 Chromium Oxide GreenOrganic Colors and Lakes38Moisture and Other Volatile Matter39Matter Soluble in Water40Total Chromium as Chromium Oxide41
1.3 This standard does not purport to address all of the safety problems, 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. Specific hazard statements are given in Note 3.
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Designation:D126–87(Reapproved2002)
Standard Test Methods for
Analysis of Yellow, Orange, and Green Pigments Containing
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Lead Chromate and Chromium Oxide Green
This standard is issued under the fixed designation D126; 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 2. Referenced Documents
1.1 These test methods cover procedures for the chemical 2.1 ASTM Standards:
analysisofyellow,orange,andgreenpigmentscontaininglead D280 Test Methods for Hygroscopic Moisture (and Other
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chromate and chromium oxide green. Matter Volatile Under the Test Conditions) in Pigments
1.2 Theanalyticalproceduresappearinthefollowingorder: D521 Test Methods for Chemical Analysis of Zinc Dust
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(Metallic Zinc Powder)
Sections
CHROME YELLOW,CHROME ORANGE, AND MOLYBDATE ORANGE
D1013 Test Method for Determining Total Nitrogen in
Organic Colors and Lakes 7
2
Resins and Plastics
Moisture and Other Volatile Matter 8
3
D1193 Specification for Reagent Water
Matter Soluble in Water 9
Lead Chromate 10 and 11
E11 Specification for Wire Cloth Sieves for Testing Pur-
Total Lead 12
4
poses
Sulfate 13 and 14
Carbon Dioxide 15
3. Summary of Test Methods
Molybdenum 16 and 17
Extenders 18-22
3.1 Chrome Yellow, Chrome Orange, and Molybdate Or-
Calculation of Substances Other than Insoluble Lead
ange:
Compounds 23 and 24
PURE CHROME GREEN AND REDUCED CHROME GREEN
3.1.1 Organic colors and lakes are determined qualitatively
Organic Colors and Lakes 25
by boiling the sample in water, then ethyl alcohol, and finally
Moisture and Other Volatile Matter 26
Matter Soluble in Water 27 chloroform.
Iron Blue 28
3.1.2 Moisture and other volatile matter are determined in
Lead Chromate 29 and 30
accordance with Test Method A of Test Methods D280.
Barium Sulfate and Insoluble Siliceous Material 31
Total Lead 32 3.1.3 Matter soluble in water is determined by boiling in
Sulfate 33
water and filtering.
Calcium Oxide Soluble in Acid 34 and 35
3.1.4 Leadchromateisdeterminedbydissolvingthesample
Extenders 36
in dilute HCl, filtering and titrating potentiometrically with
Calculation of Insoluble Lead Com-
pounds 37
FeSO solution after addition of HClO .
4 4
CHROMIUM OXIDE GREEN
3.1.5 Total lead is determined by precipitation as lead
Organic Colors and Lakes 38
Moisture and Other Volatile Matter 39 sulfide solution with H SO and final precipitation as lead
2 4
Matter Soluble in Water 40
sulfate.
Total Chromium as Chromium Oxide 41
3.1.6 Sulfate is determined by dissolving the sample in
1.3 This standard does not purport to address all of the
acetic acid, neutralizing with sodium carbonate, plus addition
safety problems, if any, associated with its use. It is the
of HCl to an aliquot followed by addition of BaCl to
2
responsibility of the user of this standard to establish appro-
precipitate as barium sulfate.
priate safety and health practices and determine the applica-
3.1.7 Carbon dioxide is determined by evolution.
bility of regulatory limitations prior to use. Specific hazard
3.1.8 Molybdenum is determined by precipitation as the
statements are given in Note 3.
sulfide, solution in HNO and H SO , addition of NH OH and
3 2 4 4
H SO . The solution is reduced in a Jones reductor, collected
2 4
under Fe (SO ) solution and titrated with KMnO solution.
2 4 3 4
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These test methods are under the jurisdiction of ASTM Committee D01 on
Paint and Related Coatings, Materials, and Applications and are the direct
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responsibility of Subcommittee D01.31 on Pigment Specifications. Annual Book of ASTM Standards, Vol 06.03.
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Current edition approved May 29, 1987. Published July 1987. Originally Annual Book of ASTM Standards, Vol 11.01.
e1 4
published as D126–22. Last previous edition D126–65(1981) . Annual Book of ASTM Standards, Vol 14.02.
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D126
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3.1.9 Extenders are either: Society, where such specifications are available. Other grades
3.1.9.1 Calciumcarbonate,calciumsulfate,magnesiumcar- may be used, provided it is first ascertained that the reagent is
bonate or; of sufficiently high purity to permit its use without lessening
(a) (a) The compounds in 3.1.9.1 are determined qualita- the accuracy of the determination.
tively by precipitation with ammonium solution. 5.2 Water—Unless otherwise indicated, references to water
(b) (b) If chromium is present, it is reduced and the lead for use in the preparation of reagents and in analy
...
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