Pb Isotope Analyses Using Bead Method: Application to BCR-1 and GSJ Standard Rock Samples

Autor:	Susumu Nohda, Tomomi Kani
Rok vydání:	2002
Předmět:	Protein filament Reproducibility chemistry.chemical_compound Ion beam chemistry Isotope Analytical chemistry chemistry.chemical_element Silicic acid Thermal ionization mass spectrometry Nitrogen Isotope analysis
Zdroj:	Journal of the Mass Spectrometry Society of Japan. 50:199-203
ISSN:	1880-4225 1340-8097
DOI:	10.5702/massspec.50.199
Popis:	It has been established that a new filament loading scheme for lead isotopic analysis using thermal ionization mass spectrometry, so called “bead method,” which gives stable ion beam and high reproducibility. Two minor modifications to this scheme are presented in this paper; finer colloidal silicic acid is used instead of silica-gel, and flash heating is performed in nitrogen environment to prevent excess oxidation of filament. We report lead isotopic compositions of the NIST lead standard SRM 981, BCR-1, and GSJ standard rock samples using the present method.
Databáze:	OpenAIRE
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