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Article: Determination of low concentrations of platinum group elements in geological samples by ID-ICP-MS

TitleDetermination of low concentrations of platinum group elements in geological samples by ID-ICP-MS
Authors
Issue Date2004
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/jaas
Citation
Journal Of Analytical Atomic Spectrometry, 2004, v. 19 n. 10, p. 1335-1339 How to Cite?
AbstractAccurate and precise determination of platinum group elements (PGEs) at ppb concentrations in geological samples is important but problematic. This paper reports an improved analytical method for the determination of Pt, Pd, Ru, Ir and Rh at sub-ppb levels by isotope dilution-inductively coupled plasma mass spectrometry (ID-ICP-MS). Prior to experimentation, all reagents were carfully purified: HBO 3, HCl and SnCl 2 by Te coprecipitation and HNO 3 and HF by subboiling distillation. HF, HNO 3 and HCl were used to decompose 10 gram sample. The fluoride residue from the acid digestion is minimized by using H 3BO 3 for complexation, thus mini-fusion of sodium peroxide can be performed in corundum crucibles instead of bulk Na 2O 2 fusion to lower blank level. The solution of acid digestion and Na 2O 2 fusion are combined and PGEs are then pre-concentrated by Te coprecipitation. Cu, Ni, Zr and Hf are removed using cation exchange resin and P507 extraction chromatography resin combined in the same column to minimize their interference. Pt, Pd, Ru and Ir are determined using ID-ICP-MS, whereas the mono-isotopic element, Rh, is determined by external calibration using highly enriched 194Pt as the internal standard. The enriched 194Pt spike behaves similar to Rh during the Te precipitation procedure and acts as an ideal internal standard. The determination limits for PGE range from 0.01-0.19 ng g -1. The results obtained using this new method for the CCRMP (CANMET, Ottawa, Canada) certified reference materials WGB-1 (gabbro), TDB-1 (diabase) and UMT-1 (ultramafic ore tailings), show good agreement with the reported values, but have discrepancies compared with the certified values when the concentration of Ru, Rh and Ir below 0.5 ng g -1. © The Royal Society of Chemistry 2004.
Persistent Identifierhttp://hdl.handle.net/10722/72425
ISSN
2015 Impact Factor: 3.379
2015 SCImago Journal Rankings: 1.022
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorQi, Len_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorWang, CYen_HK
dc.date.accessioned2010-09-06T06:41:41Z-
dc.date.available2010-09-06T06:41:41Z-
dc.date.issued2004en_HK
dc.identifier.citationJournal Of Analytical Atomic Spectrometry, 2004, v. 19 n. 10, p. 1335-1339en_HK
dc.identifier.issn0267-9477en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72425-
dc.description.abstractAccurate and precise determination of platinum group elements (PGEs) at ppb concentrations in geological samples is important but problematic. This paper reports an improved analytical method for the determination of Pt, Pd, Ru, Ir and Rh at sub-ppb levels by isotope dilution-inductively coupled plasma mass spectrometry (ID-ICP-MS). Prior to experimentation, all reagents were carfully purified: HBO 3, HCl and SnCl 2 by Te coprecipitation and HNO 3 and HF by subboiling distillation. HF, HNO 3 and HCl were used to decompose 10 gram sample. The fluoride residue from the acid digestion is minimized by using H 3BO 3 for complexation, thus mini-fusion of sodium peroxide can be performed in corundum crucibles instead of bulk Na 2O 2 fusion to lower blank level. The solution of acid digestion and Na 2O 2 fusion are combined and PGEs are then pre-concentrated by Te coprecipitation. Cu, Ni, Zr and Hf are removed using cation exchange resin and P507 extraction chromatography resin combined in the same column to minimize their interference. Pt, Pd, Ru and Ir are determined using ID-ICP-MS, whereas the mono-isotopic element, Rh, is determined by external calibration using highly enriched 194Pt as the internal standard. The enriched 194Pt spike behaves similar to Rh during the Te precipitation procedure and acts as an ideal internal standard. The determination limits for PGE range from 0.01-0.19 ng g -1. The results obtained using this new method for the CCRMP (CANMET, Ottawa, Canada) certified reference materials WGB-1 (gabbro), TDB-1 (diabase) and UMT-1 (ultramafic ore tailings), show good agreement with the reported values, but have discrepancies compared with the certified values when the concentration of Ru, Rh and Ir below 0.5 ng g -1. © The Royal Society of Chemistry 2004.en_HK
dc.languageengen_HK
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/jaasen_HK
dc.relation.ispartofJournal of Analytical Atomic Spectrometryen_HK
dc.titleDetermination of low concentrations of platinum group elements in geological samples by ID-ICP-MSen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0267-9477&volume=19&spage=1335&epage=1339&date=2004&atitle=Determination+of+low+concentrations+of+platinum+group+elements+in+geological+samples+by+ID-ICP-MSen_HK
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/b400742een_HK
dc.identifier.scopuseid_2-s2.0-17044429853en_HK
dc.identifier.hkuros108789en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-17044429853&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume19en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1335en_HK
dc.identifier.epage1339en_HK
dc.identifier.isiWOS:000224275400010-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridQi, L=7202149924en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridWang, CY=34976092700en_HK

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