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These test methods cover procedures for the chemical analysis of red lead having the approximate formula Pb3O4 (probably PbO2·2PbO). The pigment sample shall be ground to fine powder (if lumpy or not finely ground) and shall be thoroughly mixed before taking portions for analysis. Reagent grade chemicals shall be used in all tests. The methods of determining moisture, organic coloring matter, and total lead and insoluble matter contents are given. The solutions required for the chemical analysis of lead peroxide (lead dioxide) and true red lead (tetra lead oxide) includes red lead solution, sodium thiosulfate solution, and starch solution. The formula for calculating the contents of lead peroxide and true red lead, and the procedures for determining the amounts of zinc, matter soluble in water, total silica, carbon dioxide, soluble sulfates, and iron oxide are detailed.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 These test methods cover procedures for the chemical analysis of red lead having the approximate formula Pb3O4 (probably PbO2·2PbO).
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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D50 Test Methods for Chemical Analysis of Yellow, Orange, Red, and Brown Pigments Containing Iron and Manganese
D215 Practice for the Chemical Analysis of White Linseed Oil Paints
D280 Test Methods for Hygroscopic Moisture (and Other Matter Volatile Under the Test Conditions) in Pigments
D1193 Specification for Reagent Water
D1208 Test Methods for Common Properties of Certain Pigments
D1301 Test Methods for Chemical Analysis of White Lead Pigments
D1959 Test Method for Iodine Value of Drying Oils and Fatty Acids
ICS Number Code 87.060.10 (Pigments and extenders)
UNSPSC Code 12352303(Inorganic oxides); 31211604(Paint extenders)