ASTM D717-86(2003)
(Test Method)Standard Test Methods for Analysis of Magnesium Silicate Pigment
Standard Test Methods for Analysis of Magnesium Silicate Pigment
SIGNIFICANCE AND USE
These test methods may be used to confirm the stated SiO2, CaO, and MgO content of magnesium silicate for quality control.
SCOPE
1.1 These test methods cover the analysis of magnesium silicate pigment.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address the safety concerns 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
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D717–86(Reapproved2003)
Standard Test Methods for
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Analysis of Magnesium Silicate Pigment
This standard is issued under the fixed designation D 717; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Apparatus
1.1 These test methods cover the analysis of magnesium 4.1 Platinum Crucible.
silicate pigment. 4.2 Electric Furnace, capable of 1200°C.
1.2 The values stated in SI units are to be regarded as the
5. Purity of Reagents
standard. The values given in parentheses are for information
only. 5.1 Reagent grade chemicals shall be used in all tests.
Unless otherwise indicated, it is intended that all reagents shall
1.3 This standard does not purport to address the safety
concerns associated with its use. It is the responsibility of the conform to the specifications of the Committee on Analytical
Reagents of the American Chemical Society, where such
user of this standard to establish appropriate safety and health
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practices and determine the applicability of regulatory limita- specifications are available. Other grades may be used, pro-
vided it is first ascertained that the reagent is of sufficiently
tions prior to use.
high purity to permit its use without lessening the accuracy of
2. Referenced Documents
the determination.
2.1 ASTM Standards: 5.2 Unless otherwise indicated, references to water shall be
2
D 234 Specification for Raw Linseed Oil understood to mean Type II of Specification D 1193.
D 280 Test Methods for Hygroscopic Moisture (and Other
2
SILICON DIOXIDE
Matter Volatile Under the Test Conditions) in Pigments
D 718 Test Methods for Analysis of Aluminum Silicate
6. Reagents
2
Pigment
3 6.1 Hydrochloric Acid (sp gr 1.19)—Concentrated hydro-
D 1193 Specification for Reagent Water
chloric acid (HCl).
D 1208 Test Methods for Common Properties of Certain
6.2 Hydrochloric Acid (1+20)—Mix 1 volume of concen-
2
Pigments
trated hydrochloric acid (HCl, sp gr 1.19) with 20 volumes of
D 2448 TestMethodforWater-SolubleSaltsinPigmentsby
water.
Measuring the Specific Resistance of the Leachate of the
2 6.3 Hydrofluoric Acid (48 %)—Concentrated hydrofluoric
Pigment
acid (HF).
E 97 Test Method for Directional Reflectance Factor, 45-
6.4 Sodium Carbonate (Na CO ).
2 3
deg 0-deg, of Opaque Specimens by Broad-Band Filter
6.5 Sulfuric Acid (sp gr 1.84)—Concentrated sulfuric acid
4
Reflectometry
(H SO ).
2 4
3. Significance and Use
7. Procedure
3.1 These test methods may be used to confirm the stated
7.1 Transfer1gofthe sample weighed to 0.1 mg to a
SiO , CaO, and MgO content of magnesium silicate for quality
2
platinum crucible and fuse with5gofNa CO until the entire
2 3
control.
contents of the crucible are in a molten state. Continue heating
for 20 min. Keep a close-fitting platinum cover on the crucible
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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. Reagent Chemicals, American Chemical Society Specifications, American
Current edition approved Oct. 1, 2003. Published October 2003. Originally Chemical Society, Washington, DC. For suggestions on the testing of reagents not
approved in 1943. Last previous edition approved in 1986 as D 717 - 86 (1999). listed by the American Chemical Society, see Analar Standards for Laboratory
2
Annual Book of ASTM Standards, Vol 06.03. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
3
Annual Book of ASTM Standards, Vol 11.01. and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
4
Discontinued; see 1992 Annual Book of ASTM Standards, Vol 14.02. MD.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D717–86 (2003)
during the fusion. When the fusion is complete, allow the amount of K S O until it is dissolved. Leach the pyrosulfate
2 2 7
crucible and contents to cool, and transfer to a 600-mL melt out of the crucible with water and combine the solution
porcelain casserole containing 200 mL of water (Note 1). Boil with the filtrate reserved in accordance with 7.3.
until the melt is disintegrated. 10.2 Using the methyl red indicator solution, neutralize the
combined solutions from the silica determination with NH OH
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NOTE 1—If, during the cooling period, the crucible is partially im-
and add an excess of 2 drops. Bring to a boil adding NH OH
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mersed several times in cold water to chill the outer portions of the melt,
1 drop at a ti
...
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