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Standard Test Methods for Determination of Trace Elements in Coal, Coke, and Combustion Residues from Coal Utilization Processes by Inductively Coupled Plasma Atomic Emission Spectrometry, Inductively Coupled Plasma Mass Spectrometry, and Graphite Furnace Atomic Absorption Spectrometry (Includes all amendments and changes 12/17/2021).
NORMA vydaná dňa 1.12.2021
Označenie normy: ASTM D6357-21b
Dátum vydania normy: 1.12.2021
Kód tovaru: NS-1045098
Počet strán: 16
Približná hmotnosť: 48 g (0.11 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
coal, coal ash, graphite furnace atomic absorption spectrometer, inductively coupled plasma atomic emission spectrometer, inductively coupled plasma mass spectrometer, rare earth elements, trace elements,, ICS Number Code 75.160.10 (Solid fuels)
Significance and Use | ||||||||||||||||||||
5.1?Coal contains several elements whose individual mass fractions are generally less than 0.01 %. These elements are commonly and collectively referred to as trace elements. These elements primarily occur as part of the mineral matter in coal. The potential release of certain trace elements from coal combustion sources has become an environmental concern. 5.2?The ash prepared in accordance with these provisional test methods quantitatively retains the elements listed in 1.1 and is representative of their mass fractions in the coal or coke. |
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1. Scope | ||||||||||||||||||||
1.1?These test methods pertain to the determination of antimony, arsenic, beryllium, cadmium, chromium, cobalt, copper, lead, manganese, molybdenum, nickel, vanadium, and zinc in coal and coke. These test methods can also be used for the analysis of residues from coal combustion processes. Additionally, there are specific test methods outlined that pertain to the determination of rare earth elements in coal and coal combustion residues. Note 1:?These test methods may be applicable to the
determination of other trace elements.
Note 2:?Rare earth elements are understood to include: cerium,
dysprosium, erbium, europium, gadolinium, holmium, lanthanum,
lutetium, neodymium, praseodymium, samarium, scandium, terbium,
thulium, ytterbium, and yttrium.
1.2?UnitsThe values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.2.1?All percentages are percent mass fractions unless otherwise noted. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4?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. |
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2. Referenced Documents | ||||||||||||||||||||
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