Abstract:
The urine sample was acidized with HNO
3 to 1% of volume fraction of HNO
3. After centrifugation, the supernatant was diluted 10 times with 4%(
φ) HNO
3 solution. ICP-MS was applied to the simultaneous determination of 17 elements, i.e. Pb, Cd, As, Se, Mn, Cu, Zn, Sb, Be, V, Fe, Ni, Mo, Cr, Tl, Co and Sn in the solution with dynamic reaction cell.
45Sc (for determination of Mn、Cu、Be、V、Fe、Ni、Cr、Co),
72Ge (for determination of As、Se、Zn),
115In (for determination of Cd、Sb、Mo、Sn) and
209Bi (for determination of Pb、Tl) were used as internal standards. Linearity range of Fe found was in the range within 5.00 mg·L
-1and linearity ranges of the others were in the range within 50.0 μg·L
-1, with detection limits (3
s) in the range of 0.000 5-0.496 0 μg·L
-1. The proposed method was applied to the analysis of urine sample, giving values of recovery and RSD's (
n=7) in the ranges of 85.6%-110% and 0.68%-4.8% respectively.