Chemical Dissolution of Iridium Powder Using Alkali Fusion Followed by High-Temperature Leaching

Lee, Jaeryeong; Kim, Young‐Jin

doi:10.2320/matertrans.m2011202

Cited by 18 publications

(1 citation statement)

References 25 publications

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“…Formation of a Water-Soluble Salt from Ir Metal Powder. A method for the dissolution of Ir metal was developed based on information found in the literature 5,12 and modified for our work. TW43 tapered wall alumina crucibles (Al 2 O 3 , 99.8%) were purchased from Almath Crucibles Ltd. (https://almathcrucibles.com/).…”

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confidence: 99%

Development of a Primary Iridium Solution Standard Traceable to the International System of Units

Gozzi¹,

Gaines²,

Kozikowski³

et al. 2023

Anal. Chem.

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The purpose of this work was to develop a primary solution standard for iridium (Ir) that is directly traceable to the International System of Units (SI). The candidate starting material was ammonium hexachloroiridate hydrate, ((NH 4 ) 3 IrCl 6 •3H 2 O), the Ir salt. The SI traceability of the Ir salt was established by the gravimetric reduction (GR) of the salt to the metal under H 2 . GR traces the results of the analysis directly to the SI base unit of mass, the kg. The GR was also performed on high-purity Ir metal powder, an independent source of Ir, used as a comparison material for the salt. A method for dissolving the Ir metal was developed by modifying information found in the literature. Trace metallic impurities (TMI) analysis was performed on the Ir salt using ICP-OES and ICP-MS. Inert gas fusion (IGF) analysis provided data for the O, N, and H content of the gravimetrically reduced and unreduced Ir metals. The combined results of the TMI and IGF analyses provided the purity data, a required component for the claim to SI traceability. Solution standards were gravimetrically prepared from the candidate SI traceable Ir salt. Solution standards for comparison were prepared from the dissolved, unreduced high-purity Ir metal powder. These solutions were compared by a high-precision ICP-OES method. Agreement in the results between these Ir solutions, with uncertainty estimates calculated by error budget analysis, confirmed the accuracy of the Ir assay in the candidate SI traceable Ir salt, (NH 4 ) 3 IrCl 6 •3H 2 O, thus confirming the concentrations and uncertainties for the primary SI traceable Ir solution standards made from the (NH 4 ) 3 IrCl 6 •3H 2 O.

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mentioning

confidence: 99%

Development of a Primary Iridium Solution Standard Traceable to the International System of Units

Gozzi¹,

Gaines²,

Kozikowski³

et al. 2023

Anal. Chem.

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Precious Metal Separations

Narita

Kasuya

Suzuki

et al. 2020

Encyclopedia of Inorganic and Bioinorganic Chemistry

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Separation of precious metals (PMs) is becoming increasingly important because of their growing application in industrial products, such as electronics and catalysts. Most PM separation and purification processes are performed using acidic chloride solutions; therefore, a thorough understanding of the chemical properties and separation mechanisms of PM chloridometalates in solution is of key importance for improving these processes. This article focuses on the solvent extraction of PM ions from acidic chloride solutions as the main technology for the mutual separation of PMs. In addition, leaching methods, dominant species in acidic chloride solutions, and non‐solvent‐extraction separation methods are discussed.

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Development of an iridium dissolution method for the evaluation of potential radiological device materials

Hodgson

Jarvis

Grimes

et al. 2015

J Radioanal Nucl Chem

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Chemical Dissolution of Iridium Powder Using Alkali Fusion Followed by High-Temperature Leaching

Cited by 18 publications

References 25 publications

Development of a Primary Iridium Solution Standard Traceable to the International System of Units

Development of a Primary Iridium Solution Standard Traceable to the International System of Units

Precious Metal Separations

Development of an iridium dissolution method for the evaluation of potential radiological device materials

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