Ta. Hinners et al., INTERLABORATORY COMPARISON OF MASS-SPECTROMETRIC METHODS FOR LEAD ISOTOPES AND TRACE-ELEMENTS IN NIST SRM-1400 BONE ASH, Journal of analytical atomic spectrometry (Print), 13(9), 1998, pp. 963-970
The results of an interlaboratory comparison are reported for the lead
isotope composition and for trace element concentrations in NIST SRM
1400 Bone Ash obtained using quadrupole and magnetic-sector inductivel
y coupled plasma mass spectrometry (ICP-MS) and (for the Pb isotopes o
nly) thermal ionization mass spectrometry (TIMS). Concentrations of 42
analytes, in addition to the 17 listed by NIST, are presented, includ
ing the rare earth elements. Twenty-six of these analytes are consider
ed to have been reliably determined based upon the agreement of two or
more laboratories, or based upon data from a single laboratory with c
onsideration of the potential interferences. Nickel and cobalt were re
liably determined only by medium-resolution magnetic-sector ICP-MS, or
by quadrupole ICP-MS following matrix separation with an ion-exchange
column. The Pb isotope composition reported here from TIMS agrees wit
hin 0.09% relative with previously reported, non-certified values for
this standard reference material. The atomic abundances of Pb-208, Pb-
207 and Pb-206 determined by ICP-MS are statistically equivalent to th
e best-estimate TIMS values or differ statistically by 0.17% at most,
The information provided in this paper will enhance the utility of thi
s reference material.