Arsenic in standard reference material 1571 (Orchard Leaves)

E. Damsgaard, K. Heydorn

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    Inability to attain the certified concentration of arsenic in National Bureau of Standards Reference Material 1571 prompted a detailed investigation of possible systematic errors in our method (1) for the determination of arsenic, manganese, and selenium in biological materials by neutron activation analysis. Possible shortcomings in analytical technique or housekeeping were scrutinized, and followed by careful investigation of more fundamental errors from
    Losses occuring before carrier addition
    Incomplete carrier exchange
    Interfering elements
    Results indicated that although our method was not entirely without systematic errors, their magnitude was insufficient to account for the discrepancy with the certified value. We are therefore led to conclude that the true concentration of arsenic in SRM 1571 Orchard Leaves is significantly lower than the 14 ± 2 ppm certified by the National Bureau of Standards (2).
    Original languageEnglish
    Place of PublicationRoskilde, Denmark
    PublisherRisø National Laboratory
    Number of pages7
    Publication statusPublished - 1973

    Bibliographical note

    3rd Symposium on the Recent Developments in Neutron Activation Analysis, Cambridge 1973


    • Risø-M-1633


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