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Stanford-USGS shrimp-RG ion microprobe: A new approach to determining the distribution of trace elements in coal

ACS Division of Fuel Chemistry, Preprints

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Abstract

The distribution of Cr and other trace metals of environmental interest in a range of widely used U.S. coals was investigated using the Stanford-USGS SHRIMP-RG ion microprobe . Using the oxygen ion source, concentrations of Cr (11 to 176 ppm), V (23 to 248 ppm), Mn (2 to 149 ppm), Ni (2 to 30 ppm), and 13 other elements were determined in illite/smectite, a group of clay minerals commonly present in coal. The results confirm previous indirect or semi-quantitative determinations indicating illite/smectite to be an important host of these metals. Calibration was achieved using doped aluminosilicate-glass synthetic standards and glasses prepared from USGS rock standards. Grains for analysis were identified optically, and confirmed by 1) precursory electron microprobe analysis and wavelength-dispersive compositional mapping, and 2) SHRIMP-RG major element data obtained concurrently with trace element results. Follow-up investigations will focus on the distribution of As and other elements that are more effectively ionized with the cesium primary beam currently being tested.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Stanford-USGS shrimp-RG ion microprobe: A new approach to determining the distribution of trace elements in coal
Series title:
ACS Division of Fuel Chemistry, Preprints
Volume
45
Issue:
3
Year Published:
2000
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
ACS Division of Fuel Chemistry, Preprints
First page:
542
Last page:
546
Number of Pages:
5