Skip to Main Content
GEOREF RECORD

The determination of phosphate in rocks and iron ores using inductively-coupled plasma with optical emission spectroscopy (ICP-OES)

Maria M. R. Mostert
The determination of phosphate in rocks and iron ores using inductively-coupled plasma with optical emission spectroscopy (ICP-OES)
Geochemistry - Exploration, Environment, Analysis (March 2019) Pre-Issue Publication

Abstract

Phosphate is a minor but important constituent of iron ores and is especially undesirable in the production of steel, where it is considered a penalty element and is therefore tightly controlled. Iron ore quality must be determined at source, which means that deleterious elements must be accurately determined as an ongoing process. This demands fast, reliable analytical methods for the determination of, amongst others, phosphorus. However, such analysis is severely hampered by the following factors: The standard analytical method employed is X-ray fluorescence (XRF), but the measurements for phosphorus are seriously affected by matrix and inter-element interferences. An alternative technique is inductively coupled plasma with optical emission spectroscopy (ICP-OES), but there are also complications in using ICP-OES. The abundance of phosphorus in rocks is very low, generally under 0.5% wt. ICP-OES is also very insensitive to phosphorus and therefore must use the most sensitive spectral lines for quantification, and, there are serious spectral interferences on these lines by Fe and Cu. This study examines several analytical approaches for the determination of phosphate, using preparation by fusion and analysis by ICP-OES, demonstrating that suitable mathematical procedures and software applications can produce good results for phosphates, comparable to inter-laboratory tests or XRF.


ISSN: 1467-7873
EISSN: 2041-4943
Serial Title: Geochemistry - Exploration, Environment, Analysis
Serial Volume: Pre-Issue Publication
Title: The determination of phosphate in rocks and iron ores using inductively-coupled plasma with optical emission spectroscopy (ICP-OES)
Affiliation: University of Queensland, School of Earth and Environmental Sciences, Brisbane, Queensl., Australia
Published: 20190321
Text Language: English
Publisher: Geological Society Publishing House, London, United Kingdom
Number of pages: 28
References: 28
Accession Number: 2019-032128
Categories: General geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 5 tables
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201908
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal