Measurement of femtogram quantities of protactinium in silicate rock samples by multicollector inductively coupled plasma mass spectrometry

Marcel Regelous*, Simon P. Turner, Tim R. Elliott, Kia Rostami, Chris J. Hawkesworth

*Corresponding author for this work

    Research output: Contribution to journalArticle

    59 Citations (Scopus)

    Abstract

    We describe a new method for the chemical separation and analysis of Pa in silicate rock samples by isotope dilution. Our new technique has the following advantages over previous methods: (a) The initial separation of Pa from the rock matrix is carried out using anionic exchange resin and HCl-HF mixtures, avoiding the need to remove F- quantitatively from the sample solution prior to this step, (b) Efficient ionization of Pa is achieved using a multicollector inductively coupled plasma mass spectrometer, so that smaller sample sizes and shorter measurement times are required, compared to previous methods using thermal ionization mass spectrometry or alpha spectrometry. (c) Plasma ionization requires less efficient separation of the high field strength elements from Pa, thus reducing reagent volumes, blanks, and sample preparation times. Instrumental mass fractionation can be corrected for using admixed U of known isotopic composition. Using this method, Pa concentrations can be measured to a precision of ∼0.5% and an accuracy of ∼1% using only a few tens of femtograms of Pa.

    Original languageEnglish
    Pages (from-to)3584-3589
    Number of pages6
    JournalAnalytical Chemistry
    Volume76
    Issue number13
    DOIs
    Publication statusPublished - 1 Jul 2004

    Fingerprint Dive into the research topics of 'Measurement of femtogram quantities of protactinium in silicate rock samples by multicollector inductively coupled plasma mass spectrometry'. Together they form a unique fingerprint.

    Cite this