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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
By: , and 

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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