1、ASTM D2742 79 m 0759530 0027043 T I-Designation:D 2742-79 Standard Methods for CHEMICAL ANALYSIS OF TRIBASIC LEAD PHOSPHOSILICATE This standard is issued under the fmed.designation D 2742;the number immediately followiug the designation indicates the vear of original adoption or,in the caseof revisi
2、on,the year of last revision.A number in parentheses indicates the year of last ieapprovar-1.scope 1.i These methods cover the chemical anal-ysis of the pigment commercially known as tribasic lead phosphosilicate.1.2 The analytical procedures appear in the following order:Sections Lead Oxide 6io 10;
3、P;phorus as P205:14 10 to to 13 17 Moisture and Other Volatile Matter 18 Water of Hydration 19 and 20 Coarse Particles Oil Absorption t;1.3 Individual specimens may k-used for direct PbO,PzO,and SiOz determinations,Si&should be removed before PbO is deter-mined.Removal of SiOz and PbO is recom-mende
4、d before determining PzOs.The method for the Pz05 determination is satisfactory for specimens containing from 2 to 25 mg of Pz05 and the specimen size or aliquot should be varied accordingly.2.Applicable Documents 2.1 ASTM Standards:D 185 Tests for Coarse Particles in Pigments,Pastes,and Paints D280
5、 Test for Hygroscopic Moisture(and Other Matter Volatile Under the Test Conditions)in Pigments D 281 Test for Oil Absorption of Pigments by Spatula Rub-Out _ D 1193 Specification for Reagent Water3 3.Purity of Reagents 3.1 Reagent grade chemicals shall be used in all-tests.Unless otherwise indicated
6、,it is in-tended that all reagents shall conform to the specificr+tions of the Committee on Analytical Reagents of the American Chemical Society where such specifications are available.4 Other grades may be used,provided it is first a&-tained that the reagent is of sufficiently high purity io permit
7、 its use without lessening the.accuracy of the determination.3.2 Unless otherwise indicated,references to water shall be understood to mean to Type II reagent grade water conforming to Specitica-tion D 1193.4.Safety Precautions 4.1 Ammonium Hydroxide causes severe burns and may be fatal if swallowed
8、.Do not get liquid or vapor in eyes,on skin,or on clothing.Avoid breathing vapor.For Eyes:Im-mediately flush with water for at least 15 min.Call a physician.External:Flood with tap wa-ter.Remove contaminated clothing.Wash well bef&e reuse.Internal:Do not give emetics.Do not induce vomiting.Give wate
9、r with large amounts of diluted vinegar,lemon,or o!ange juice,Follow with milk or whites of eggs beaten in water.Call a physician.The-se methods are under the jurisdiction of ASTM Committee D-l on Paint and Related Coatiugsand Materials and is the direct responsibility of Subcommittee D01-21 on Chem
10、ical Analysis of Paint and Paint Materials.Current edition approved Sept.28,1979.Published De-cember 1979.Originally published as D2742-68.Last previous edition D 2742-73.2Anntral Book of ASTM Sfondards,Part 28.3Annuol Book of ASTM Srandards,Part 29.“Reagent Chemicals,American Chemical Society Spec-
11、ifications:Am.Chemical Sot.,Washington,DC.For sug-gestions on the testing of reagents not listed by the American Chemical Society,see“Reagent Chemicals and Standards,”by Joseph Rosin,D.Van Nostrand Co.Inc.,New York,N.Y.and the“United States Pharmacopeia.”NOTICE:This standard has either been supersed
12、ed and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.4.2 Denatured Ethyl Alcohol and Methyl Al-cohol may be fatal or cause blindness if swal-lowed.Harmful if inhaled.Keep away from heat,sparks,or open flame.Avoid breathing vapor.Use only
13、 with adequate ventilation.In case of fire use water spray,alcohol foam,dry chemical,or carbon dioxide.For Eyes:Imme-diately flush with water for at least 15 min.Call a physician.External:Flood with tap water.Remove contaminated clothing.Wash well be-fore reuse.Internal:If conscious,induce vom-iting
14、 immediately by giving a tablespoon of salt in a glass of warm water.Repeat until vomit fluid is clear.Call a physician.4.3 Isopropanol-Flammable.Vapor is harmful.May be fatal if swallowed.Keep away from heat,sparks,and flame.Avoid breathing vapor.Use only with adequate ventilation.Do not get in eye
15、s.For Eyes:Immediately flush with water for at least 15 min.Call a physician.External:Flood with tap water.Remove con-taminafed clothing.Wash well before reuse.4.4 Hydrochloric and Sulfrrric Acids cause severe burns and may be fatal if swallowed.Do not get in eyes,on skin,or on clothing.Do not add w
16、ater while in a container unless done when cool and with extreme caution.A violent reaction may occur especially with sulfuric acid.Use a hood when handling.Avoid breathing vapor.For Eyes:Immediately flush with water for at least 15 min.Call a physician.External:Flood with tap water and then water containing so-dium bicarbonate,Remove contaminated clothing.Wash well before reuse.Internal:Do not give emetics,Do not induce vomiting.Give tap water,milk,or milk of magnesia.Give whites of eggs beaten
