Reliability and reproducibility of leaching procedures to estimate the modes of occurrence of trace elements in coal
Book
·
OSTI ID:254752
- Geological Survey, Reston, VA (United States); and others
The 1990 amendments to the Clean Air Act have renewed interest in chemical forms or modes of occurrence of trace elements for potentially toxic trace elements in coal. Selective solvent leaching has been useful in estimating these modes of occurrence. This technique is much faster than previous attempts to determine the modes of occurrence of trace elements in coal, such as scanning electron microscopy, analysis of density separates of coal and low-temperature ash. However, relatively little has been published about the reproducibility and reliability of the solvent leaching procedure. For this paper, three previously analyzed coal samples were leached individually and (or) sequentially using procedures described previously. The concentrations of 45 elements were determined by analyzing the leachate by inductively coupled argon plasma-atomic emission spectroscopy (ICAP-AES) and (or) the residue by instrumental neutron activation analysis (INAA).
- OSTI ID:
- 254752
- Report Number(s):
- CONF-940813--
- Country of Publication:
- United States
- Language:
- English
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