首页|Sodium peroxide fusion for reliable determination of gold in ores and metallurgical samples
Sodium peroxide fusion for reliable determination of gold in ores and metallurgical samples
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NSTL
Elsevier
<![CDATA[<ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="ab0005" xml:lang="en" view="all" class="author"><ce:section-title id="st0005">Abstract</ce:section-title><ce:abstract-sec id="as0005" view="all"><ce:simple-para id="sp0025" view="all">A protocol based on peroxide fusion has been developed for the determination of Au in metallurgical samples and ores covering a wide range of concentrations and diverse mineralogies. The quantity of Na<ce:inf loc="post">2</ce:inf>O<ce:inf loc="post">2</ce:inf>required was minimised, while maintaining lixiviant efficacy, by the use of mixed NaOH + Na<ce:inf loc="post">2</ce:inf>O<ce:inf loc="post">2</ce:inf>fluxes. The method was shown to be particularly applicable to the determination of coarsely-particulate gold. Fusion cakes were dissolved in hydrochloric acid and then extracted using methylisobutylketone to provide concentrations appropriate for quantification by graphite furnace atomic absorption spectroscopy and to minimise interferences from dissolved salts. The protocol was tested on a variety of certified reference materials and produced results in excellent agreement (at Au concentrations ranging from 0.05 to 47μgg<ce:sup loc="post">?1</ce:sup>) with the traditional lead fire assay method, while avoiding the health and safety issues associated with that technique.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="ab0010" class="author-highlights" xml:lang="en" view="all"><ce:section-title id="st0010">Highlights</ce:section-title><ce:abstract-sec id="as0010" view="all"><ce:simple-para id="sp0030" view="all"><ce:list id="l0005"><ce:list-item id="li0005"><ce:label>?</ce:label><ce:para id="p0005" view="all">Peroxide fusion GFAAS method suitable for routine commercial lab analysis developed</ce:para></ce:list-item><ce:list-item id="li0010"><ce:label>?</ce:label><ce:para id="p0010" view="all">Results comparable to Pb fire assay over wide range of mineralogy and concentration</ce:para></ce:list-item><ce:list-item id="li0015"><ce:label>?</ce:label><ce:para id="p0015" view="all">Potential for gold losses critically evaluated and found to be minimal.</ce:para></ce:list-item><ce:list-item id="li0020"><ce:label>?</ce:label><ce:para id="p0020" view="all">Addition of NaOH significantly reduces amount of Na<ce:inf loc="post">2</ce:inf>O<ce:inf loc="post">2</ce:inf>required.</ce:para></ce:list-item></ce:list></ce:simple-para></ce:abstract-sec></ce:abstract>]]>
GoldPeroxide fusionMetallurgical samplesOres
Lou Daniel、Damian W. Laird、Glenn T. Hefter
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Chemistry, School of Engineering and IT, Murdoch University
NSTL
Elsevier
