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Geostandards and Geoanalytical Research

Resumen/Descripción – provisto por la editorial en inglés

Geostandards & Geoanalytical Research is an international journal dedicated to advancing the science of reference materials, analytical techniques and data quality relevant to the chemical analysis of geological and environmental samples. Papers are accepted for publication following peer review.

Palabras clave – provistas por la editorial

Geostandards and Geoanalytical Research; Geostandards; Geoanalytical Research; geoanalysis

Disponibilidad

Institución detectada	Período	Navegá	Descargá	Solicitá
No detectada	desde ene. 2004 / hasta dic. 2023	Wiley Online Library

Información

Tipo de recurso:

revistas

ISSN impreso

1639-4488

ISSN electrónico

1751-908X

País de edición

Estados Unidos

Fecha de publicación

2004-

Cobertura temática

Ciencias de la tierra y ciencias ambientales relacionadas

Tabla de contenidos

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doi: 10.1111/ggr.12149

Method Development and Optimisation of Sodium Peroxide Sintering for Geological Samples

Syed Nadeem Hussain Bokhari; Thomas C. Meisel

<jats:p>This work provides a measurement procedure for the complete digestion of rock samples containing refractory minerals such as zircon and chromite. Their dissolution by wet acid digestion is often incomplete but, although providing complete digestions, alkali fusion techniques can result in solutions with a high blank and total dissolved solid content. It was established by the systematic study with reference material trachyandesite <jats:styled-content style="fixed-case">MTA</jats:styled-content>‐1 that a 1:6 sample to sodium peroxide (Na<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub>) ratio is conservative for the complete digestion and recovery of all the analytes especially those contained in zircon. The sample decomposition time was 120 min for the zircon‐bearing rhyolite reference material <jats:styled-content style="fixed-case">MRH</jats:styled-content>‐1. Complete digestion of chromite was obtained in the harzburgite <jats:styled-content style="fixed-case">RM MUH</jats:styled-content>‐1. The sample solutions were stable for at least 1 year. Accurate measurements of SiO<jats:sub>2</jats:sub>, Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>, TiO<jats:sub>2</jats:sub>, P<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub> and K<jats:sub>2</jats:sub>O could be made with <jats:styled-content style="fixed-case">ICP</jats:styled-content>‐<jats:styled-content style="fixed-case">MS</jats:styled-content> by not discarding the supernatant of the sinter solution and by using geological reference materials for external calibration. <jats:styled-content style="fixed-case">HF</jats:styled-content> digestions are slow, not universal, and may form new mineral/phases that are insoluble under high temperature conditions. The validated sample decomposition procedure combined with <jats:styled-content style="fixed-case">ICP</jats:styled-content>‐<jats:styled-content style="fixed-case">MS</jats:styled-content> presents an alternative to the use <jats:styled-content style="fixed-case">of HF</jats:styled-content> in routine analysis of difficult to digest geological materials.</jats:p>

Pp. 181-195