start-ver=1.4
cd-journal=joma
no-vol=43
cd-vols=
no-issue=4
article-no=
start-page=611
end-page=633
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2019
dt-pub=20190320
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Method to Suppress Isobaric and Polyatomic Interferences for Measurements of Highly Siderophile Elements in Desilicified Geological Samples
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract= Sample decomposition using inverse aqua regia at elevated temperatures and pressures (e.g., Carius tube or high]pressure asher) is the most common method used to extract highly siderophile elements (HSEs: Ru, Rh, Pd, Re, Os, Ir, Pt and Au) from geological samples. Recently, it has been recognised that additional HF desilicification is necessary to better recover HSEs, potentially contained within silicate or oxide minerals in mafic samples, which cannot be dissolved solely by inverse aqua regia. However, the abundance of interfering elements tends to increase in the eluent when conventional ion]exchange purification procedures are applied to desilicified samples. In this study, we developed an improved purification method to determine HSEs in desilicified samples. This method enables the reduction of the ratios of isobaric and polyatomic interferences, relative to the measured intensities of HSE isotope masses, to less than a few hundred parts per million. Furthermore, the total procedural blanks are either comparable to or lower than conventional methods. Thus, this method allows accurate and precise HSE measurements in mafic and ultramafic geological samples, without the need for interference corrections. Moreover, the problem of increased interfering elements, such as Zr for Pd and Cr for Ru, is circumvented for the desilicified samples.
en-copyright=
kn-copyright=

en-aut-name=ZhouXiaoyu
en-aut-sei=Zhou
en-aut-mei=Xiaoyu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=TanakaRyoji
en-aut-sei=Tanaka
en-aut-mei=Ryoji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=YamanakaMasahiro
en-aut-sei=Yamanaka
en-aut-mei=Masahiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=SakaguchiChie
en-aut-sei=Sakaguchi
en-aut-mei=Chie
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=NakamuraEizo
en-aut-sei=Nakamura
en-aut-mei=Eizo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

affil-num=1
en-affil=The Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University
kn-affil=

affil-num=2
en-affil=The Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University
kn-affil=

affil-num=3
en-affil=The Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University
kn-affil=

affil-num=4
en-affil=The Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University
kn-affil=

affil-num=5
en-affil=The Pheasant Memorial Laboratory for Geochemistry and Cosmochemistry, Institute for Planetary Materials, Okayama University
kn-affil=
en-keyword=highly siderophile elements
kn-keyword=highly siderophile elements
en-keyword=desilicification
kn-keyword=desilicification
en-keyword=isotope dilution method
kn-keyword=isotope dilution method
en-keyword=high resolution ICP-MS
kn-keyword=high resolution ICP-MS
en-keyword=N-TIMS
kn-keyword=N-TIMS
END