4.1 These test methods provide accurate and reliable analytical procedures to determine the chemical constituents of limestone, quicklime, and hydrated lime (see Note 1). The percentages of specific constituents which determine a material's quality or fitness for use are of significance depending upon the purpose or end use of the material. Results obtained may be used in relation to specification requirements.
4.2 Because quicklime and hydrated lime quickly absorb water and carbon dioxide from the air, precision and bias are extremely dependent upon precautions taken during sample preparation and analysis to minimize excessive exposure to ambient conditions.
Note 1: These test methods can be applied to other calcareous materials if provisions are made to compensate for known interferences.
Область применения1.1 These test methods cover the chemical analysis of high-calcium and dolomitic limestone, quicklime, and hydrated lime. These test methods are classified as either standard (preferred) or alternative (optional).
1.2 The standard test methods are those that employ classical gravimetric or volumetric analytical procedures and are typically those required for referee analyses where chemical specification requirements are an essential part of contractual agreement between buyer and seller.
1.3 Alternative or optional test methods are provided for those who wish to use procedures shorter or more convenient than the standard methods for the routine determinations of certain constituents. Optional test methods may sometimes be preferred to the standard test methods, but frequently the use of modern and expensive instrumentation is indicated which may not be accessible to everyone. Therefore, the use of these test methods must be left to the discretion of each laboratory.
1.4 The analytical procedures appear in the following order:
Section
Aluminum Oxide
15
Available Lime Index
28
Calcium and Magnesium Oxide:
Alternative EDTA Titration Method
31
Calcium Carbonate Equivalent
33
Calcium Oxide:
Gravimetric Method
16
Volumetric Method
17
Carbon Dioxide by Standard Method
22
Combined Oxides of Iron and Aluminum
12
Ferrous Iron
Appendix X5
Free Calcium Oxide
Appendix X6
Free Moisture in Hydrated Lime
21
Free Moisture in Limestone
20
Free Silica
29
Insoluble Matter Including Silicon Dioxide:
Standard Method
8
Optional Perchloric Acid Method
9
Insoluble Matter Other Than Silicon Dioxide
11
Loss on Ignition
19
Magnesium Oxide
18
Manganese:
Bismuthate Method
Appendix X4
Periodate (Photometric) Method
27
pH Determination of Alkaline Earth Solutions
34
Phosphorus:
Titrimetric Method
Appendix X3
Molybdovanadate Method
26
Silicon Dioxide
10
Strontium Oxide
Appendix X2
Sulfur Trioxide
23
Total Carbon:
Direct Combustion-Thermal Conductivity Cell
Method
32
Total Carbon and Sulfur:
Combustion/Infrared Detection Method
35
Total Iron:
Standard Method, Potassium Dichromate
Titration
13
Potassium Permanganate Titration Method
Appendix X1
Ortho-Phenanthroline, Photometric Method
14
Total Sulfur:
Sodium Carbonate Fusion
24
Combustion-Iodate Titration Method
25
Unhydrated Oxides
30
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
For specific precautionary statements, see 9.3, 10.2.1, 18.4.3, 31.6.4.2, X2.3.1, and X5.4.1.1.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.