1989 Volume 38 Issue 12 Pages 697-700
The accuracy and precision in isotope ratio measurements of lead by an ICP-MS were studied. The results of ICP-MS measurement obtained for the NBS SRM 981 lead standard were compared with the those by thermal ionization mass spectrometry (TIMS) and the NBS certified values. The precision of isotope ratio measurements with ICP-MS was worse than that with TIMS, but the values of ratio obtained by ICP-MS showed a good agreement with the values obtained by TIMS and certified ones by NBS. The isotope dilution ICP-MS was applied to the micro determination of lead in nickel alloys. A good agreement was obtained between the determined values and the certified values of lead in NBS SRM 897, 898, 899 nickel alloy standards with the precision of 1.02.1%, which was superior than that obtained by a calibration method.
