School of Engineering and Science - Jacobs University

1500
0.5 M HCl
4.0
interference on 62 Ni in sample solution (cps)
1000
500
JDo-1 dolomite (2.9 mg/kg Ni)
MgCl +
CaO(H) + (Ni in acid blank?)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
interference on 62 Ni in sample powder (mg/kg)
0
0.0
0 10 20 30 40 50 60 70 80 90 100
MgO, CaO in sample powder (wt.%)
Figure A2.3. Interferences observed at mass 62 (Ni) in 0.5 M HCl due to sample Mg and Ca
content. JDo-1 contains 18.4% MgO and 34.0% CaO, effectively prohibiting in carbonate rocks
determinations of Ni concentrations that are similar to JDo-1 (2.9 mg/kg Ni).
600
4.5
500
4.0
interference on 62 Ni in sample solution (cps)
400
300
200
100
0.5 M HNO 3
MgO, CaO in sample powder (wt.%)
CaO(H) + (Ni in acid blank?)
JDo-1 dolomite (2.9 mg/kg Ni)
not MgCl + (Ni in Mg standard?)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
interference on 62 Ni in sample powder (mg/kg)
0
0.0
0 10 20 30 40 50 60 70 80 90 100
Figure A2.4. Interferences observed at mass 62 (Ni) in 0.5 M HNO 3 due to sample Mg and Ca content.
When monitored in HNO 3 matrices, the 62 Ni isotope is likely the most useful for trace Ni
determinations in carbonate rocks, though the low abundance of 62 Ni (3.63%), which generates low
ICPMS signal intensities, must be considered.
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