ASTM C25-2006 Standard Test Methods for Chemical Analysis of Limestone Quicklime and Hydrated Lime《石灰石、生石灰和熟石灰化学分析的标准试验方法》.pdf
《ASTM C25-2006 Standard Test Methods for Chemical Analysis of Limestone Quicklime and Hydrated Lime《石灰石、生石灰和熟石灰化学分析的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM C25-2006 Standard Test Methods for Chemical Analysis of Limestone Quicklime and Hydrated Lime《石灰石、生石灰和熟石灰化学分析的标准试验方法》.pdf(36页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C 25 06Standard Test Methods forChemical Analysis of Limestone, Quicklime, and HydratedLime1This standard is issued under the fixed designation C 25; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last rev
2、ision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon (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. Scope1.1 These test methods cover the chemical analys
3、is ofhigh-calcium and dolomitic limestone, quicklime, and hy-drated lime. These test methods are classified as either standard(preferred) or alternative (optional).1.2 The standard test methods are those that employ classi-cal gravimetric or volumetric analytical procedures and aretypically those re
4、quired for referee analyses where chemicalspecification requirements are an essential part of contractualagreement between buyer and seller.1.3 Alternative or optional test methods are provided forthose who wish to use procedures shorter or more convenientthan the standard methods for the routine de
5、terminations ofcertain constituents. Optional test methods may sometimes bepreferred to the standard test methods, but frequently the use ofmodern and expensive instrumentation is indicated which maynot be accessible to everyone. Therefore, the use of these testmethods must be left to the discretion
6、 of each laboratory.1.4 The analytical procedures appear in the following order:SectionAluminum Oxide 15Available Lime Index 28Calcium and Magnesium Oxide:Alternative EDTA Titration Method 31Calcium Carbonate Equivalent 33Calcium Oxide:Gravimetric Method 16Volumetric Method 17Carbon Dioxide by Stand
7、ard Method 22Combined Oxides of Iron and Aluminum 12Ferrous Iron Appendix X5Free Calcium Oxide Appendix X6Free Moisture in Hydrated Lime 21Free Moisture in Limestone 20Free Silica 29Insoluble Matter Including Silicon Dioxide:Standard Method 8Optional Perchloric Acid Method 9Insoluble Matter Other Th
8、an Silicon Diox-ide11Loss on Ignition 19Magnesium Oxide 18Manganese:Bismuthate Method Appendix X4Periodate (Photometric) Method 27pH Determination of Alkaline Earth Solu-tions34Phosphorus:Titrimetric Method Appendix X3Molybdovanadate Method 26Silicon Dioxide 10Strontium Oxide Appendix X2Sulfur Triox
9、ide 23Total Carbon:Direct Combustion-Thermal Conductiv-ity Cell Method32Total Carbon and Sulfur:Combustion/Infrared Detection Method 35Total Iron:Standard Method, Potassium Dichro-mate Titration13Potassium Permanganate TitrationMethodAppendix X1Ortho-Phenanthroline, PhotometricMethod14Total Sulfur:S
10、odium Carbonate Fusion 24Combustion-Iodate Titration Method 25Unhydrated Oxides 301.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and d
11、etermine the applica-bility of regulatory limitations prior to use. For specificprecautionary statements, see 9.3, 10.2.1, 18.4.3, 31.6.4.2,X2.3.1, and X5.4.1.1.2. Referenced Documents2.1 ASTM Standards:2C50 Practice for Sampling, Sample Preparation, Packag-ing, and Marking of Lime and Limestone Pro
12、ductsC51 Terminology Relating to Lime and Limestone (as usedby the Industry)C911 Specification for Quicklime, Hydrated Lime, andLimestone for Chemical and Industrial Uses1These test methods are under the jurisdiction of ASTM Committee C07 onLime and are the direct responsibility of Subcommittee C07.
13、05 on Chemical Tests.Current edition approved Feb. 15, 2006. Published March 2006. Originallyapproved in 1919. Last previous edition approved in 1999 as C 2599.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of
14、 ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.D 1193 Specification for Reagent WaterE29 Practice for Using Significant Digits in Tes
15、t Data toDetermine Conformance with SpecificationsE50 Practices for Apparatus, Reagents, and Safety Consid-erations for Chemical Analysis of Metals, Ores, andRelated MaterialsE70 Test Method for pH of Aqueous Solutions With theGlass ElectrodeE 173 Practice for Conducting Interlaboratory Studies ofMe
16、thods for Chemical Analysis of Metals3E 200 Practice for Preparation, Standardization, and Stor-age of Standard and Reagent Solutions for ChemicalAnalysisE 691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE 832 Specification for Laboratory Filter Papers3
17、. Terminology3.1 DefinitionsUnless otherwise specified, for definitionsof terms used in these test methods refer to Terminology C51.4. Significance and Use4.1 These test methods provide accurate and reliable ana-lytical procedures to determine the chemical constituents oflimestone, quicklime, and hy
18、drated lime (See Note 1). Thepercentages of specific constituents which determine a materi-als quality or fitness for use are of significance dependingupon the purpose or end use of the material. Results obtainedmay be used in relation to specification requirements.4.2 Because quicklime and hydrated
19、 lime quickly absorbwater and carbon dioxide from the air, precision and bias areextremely dependent upon precautions taken during samplepreparation and analysis to minimize excessive exposure toambient conditions.NOTE 1These test methods can be applied to other calcareousmaterials if provisions are
20、 made to compensate for known interferences.5. General Apparatus and Materials and Reagents5.1 General Apparatus and Materials:5.1.1 BalanceThe balance shall be of an analytical typewith a capacity not to exceed 200 g. It may be of conventionaldesign or it may be a constant-load, direct-reading type
21、. It shallbe capable of reproducing weighings within 0.0002 g with anaccuracy of 6 0.0002 g. Rapid weighing devices that may beprovided such as a chain, damper, or heavy riders shall notincrease the basic inaccuracy by more than 0.0001 g at anyreading and with any load within the rated capacity of t
22、hebalance.5.1.2 WeightsWeights used for analysis shall conform toClass S-1 requirements of the National Institute of Standardsand Technology as described in NIST Circular 547.4They shallbe checked at least once a year or when questioned, andadjusted to within allowable tolerances for Class S-1 weigh
23、ts.All new sets of weights purchased shall have the weights of 1g and larger made of stainless steel or other corrosion-resistantalloy not requiring protective coating and shall meet thedensity requirements for Class S.5.1.3 Glassware and Laboratory ContainersStandardvolumetric flasks, burets, pipet
24、s, dispensers, etc., shall becarefully selected precision grade or better and shall becalibrated, if necessary, to meet the requirements of eachoperation. Standard-type interchangeable ground glass or TFE-fluorocarbon joints are recommended for all volumetric glass-ware. Polyethylene containers are
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