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Title: Decomposition of diverse solid inorganic matrices with molten ammonium bifluoride salt for constituent elemental analysis

Abstract

Ammonium bifluoride (ABF, NH4F·HF) is a well-known reagent for converting metal oxides to fluorides and for its applications in breaking down minerals and ores in order to extract useful components. It has been more recently applied to the decomposition of inorganic matrices prior to elemental analysis. Herein, a sample decomposition method that employs molten ABF sample treatment in the initial step is systematically evaluated across a range of inorganic sample types: glass, quartz, zircon, soil, and pitchblende ore. Method performance is evaluated across the two variables: duration of molten ABF treatment and ABF reagent mass to sample mass ratio. The degree of solubilization of these sample classes are compared to the fluoride stoichiometry that is theoretically necessary to enact complete fluorination of the sample types. Finally, the sample decomposition method is performed on several soil and pitchblende ore standard reference materials, after which elemental constituent analysis is performed by ICP-OES and ICP-MS. Elemental recoveries are compared to the certified values; results indicate good to excellent recoveries across a range of alkaline earth, rare earth, transition metal, and actinide elements.

Authors:
ORCiD logo; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)
OSTI Identifier:
1378025
Report Number(s):
PNNL-SA-122790
Journal ID: ISSN 0009-2541; DN2001000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Chemical Geology; Journal Volume: 466; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; decomposition; digestion; fluorination; mineral; glass; soil; ore; environmental analysis; ICP-MS; ICP-OES; NH4HF2; NH4F·HF; ammonium bifluoride; environmental applications

Citation Formats

O'Hara, Matthew J., Kellogg, Cyndi M., Parker, Cyrena M., Morrison, Samuel S., Corbey, Jordan F., and Grate, Jay W.. Decomposition of diverse solid inorganic matrices with molten ammonium bifluoride salt for constituent elemental analysis. United States: N. p., 2017. Web. doi:10.1016/j.chemgeo.2017.06.023.
O'Hara, Matthew J., Kellogg, Cyndi M., Parker, Cyrena M., Morrison, Samuel S., Corbey, Jordan F., & Grate, Jay W.. Decomposition of diverse solid inorganic matrices with molten ammonium bifluoride salt for constituent elemental analysis. United States. doi:10.1016/j.chemgeo.2017.06.023.
O'Hara, Matthew J., Kellogg, Cyndi M., Parker, Cyrena M., Morrison, Samuel S., Corbey, Jordan F., and Grate, Jay W.. Fri . "Decomposition of diverse solid inorganic matrices with molten ammonium bifluoride salt for constituent elemental analysis". United States. doi:10.1016/j.chemgeo.2017.06.023.
@article{osti_1378025,
title = {Decomposition of diverse solid inorganic matrices with molten ammonium bifluoride salt for constituent elemental analysis},
author = {O'Hara, Matthew J. and Kellogg, Cyndi M. and Parker, Cyrena M. and Morrison, Samuel S. and Corbey, Jordan F. and Grate, Jay W.},
abstractNote = {Ammonium bifluoride (ABF, NH4F·HF) is a well-known reagent for converting metal oxides to fluorides and for its applications in breaking down minerals and ores in order to extract useful components. It has been more recently applied to the decomposition of inorganic matrices prior to elemental analysis. Herein, a sample decomposition method that employs molten ABF sample treatment in the initial step is systematically evaluated across a range of inorganic sample types: glass, quartz, zircon, soil, and pitchblende ore. Method performance is evaluated across the two variables: duration of molten ABF treatment and ABF reagent mass to sample mass ratio. The degree of solubilization of these sample classes are compared to the fluoride stoichiometry that is theoretically necessary to enact complete fluorination of the sample types. Finally, the sample decomposition method is performed on several soil and pitchblende ore standard reference materials, after which elemental constituent analysis is performed by ICP-OES and ICP-MS. Elemental recoveries are compared to the certified values; results indicate good to excellent recoveries across a range of alkaline earth, rare earth, transition metal, and actinide elements.},
doi = {10.1016/j.chemgeo.2017.06.023},
journal = {Chemical Geology},
number = C,
volume = 466,
place = {United States},
year = {Fri Sep 01 00:00:00 EDT 2017},
month = {Fri Sep 01 00:00:00 EDT 2017}
}