SI-traceable values for cadmium and lead in the candidate reference material MURST-ISS A1 Antarctic sediment by combination of ICP-MS with isotope dilution
Isotope Dilution (ID) is an important tool for chemical metrology and has been in use since the fifties. Recently it has been accepted by the Comité Consultatif pur la Quantité de Matière (CCQM) as a primary method of measurement. Inductively coupled plasma-mass spectrometry (ICP-MS) is a sensitive method mostly used for multi-element analysis and can be used to measure isotope amount ratios with typical reproducibilities of 0.2%. The combination of ID with ICP-MS allows certification of elements with an expanded uncertainty U of typically 2-3% (coverage factor k=2). The combination of ID and ICP-MS was applied for the certification of Cd and Pb concentration in the Candidate Reference Material (CRM) MURST-ISS A1 Antarctic Sediment. The uncertainty budgeting of this procedure was performed in detail and some considerations are offered about other approaches.
Bibliographic Reference: Article: Analytica Chimica Acta (1996)
Record Number: 199611063 / Last updated on: 1996-09-30
Original language: en
Available languages: en