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Selective chemical dissolution of sulfides: An evaluation of six methods applicable to assaying sulfide-bound nickel

Chemical Geology

By:
, , ,
DOI: 10.1016/0009-2541(86)90079-3

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Abstract

Six analytical techniques for the selective chemical dissolution of sulfides are compared with the purpose of defining the best method for accurately determining the concentration of sulfide-bound nickel. Synthesized sulfide phases of known elemental content, mixed with well-analyzed silicates, were used to determine the relative and absolute efficiency, based on Ni and Mg recovery, of the techniques. Tested leach-methods purported to dissolve sulfide from silicate phases include: brominated water, brominated water-carbon tetrachloride, nitric-hydrochloric acid, hydrogen peroxide-ammonium citrate, bromine-methanol and hydrogen peroxide-ascorbic acid. Only the hydrogen peroxide-ammonium citrate method did not prove adequate in dissolving the sulfide phases. The remaining five methods dissolved the sulfide phases, but the indicated amount of attack on the silicate portion ranged from 3% to 100%. The bromine-methanol method is recommended for assaying sulfide-Ni deposits when Ni is also present in silicate phases. ?? 1986.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Selective chemical dissolution of sulfides: An evaluation of six methods applicable to assaying sulfide-bound nickel
Series title:
Chemical Geology
DOI:
10.1016/0009-2541(86)90079-3
Volume
54
Issue:
1-2
Year Published:
1986
Language:
English
Publisher:
Elsevier
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Chemical Geology
First page:
157
Last page:
162
Number of Pages:
6