School of Engineering and Science - Jacobs University

4000
0.40
0.20
3500
0.17 mg/kg
0.18
0.35
interference on 89 Y in sample solution (cps)
3000
2500
2000
1500
1000
500
0.5 M HCl
0.5 M HNO 3
0.13 mg/kg
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0
0 10 20 30 40 50 60 70 80 90 100
Fe 2
O 3
in sample powder (wt.%)
0.5 M HCl
0.5 M HNO 3
0.30
0.25
0.20
0.15
0.10
0.05
interference on 89 Y in sample powder (mg/kg)
Figure A2.7. Interferences observed at mass 89 (Y) in both 0.5 M HCl and HNO 3 as a function of Fe
content. Note right vertical axis denotes two concentration scales, dependent upon acid matrix. A
minor 54 Fe 35 Cl interference exists in 0.5 M HCl, and interferences are linear, though small, for both
acid matrices, perhaps reflecting small Y contamination in artificial Fe solution. Concentrations of Y in
all Fe-rich CRMs are 8-12 mg/kg, suggesting that Fe-interferences in these CRMs are not significant.
12000
1.3 mg/kg
2.5
10000
1.2
interference on 90 Zr in sample solution (cps)
8000
6000
4000
2000
0.5 M HCl
0.5 M HNO 3
0.13 mg/kg
0
0 5 10 15 20
MnO in sample powder (wt.%)
0.5 M HCl
1.0
0.8
0.6
0.4
0.2
0.5 M HNO 3
2.0
1.5
1.0
0.5
interference on 90 Zr in sample powder (mg/kg)
Figure A2.8. Interferences observed at mass 90 (Zr) in both 0.5 M HCl and HNO 3 as a function of MnO
content. Note right vertical axis denotes two concentration scales, dependent upon acid matrix. A strong
55 Mn 35 Cl interference exists in 0.5 M HCl. Concentrations of MnO in Fe-Mn crusts (and Mn ores) may
exceed 30%, and extrapolation of the data suggest possible interferences on 90 Zr of several mg/kg.
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