FeO and Fe2O3 | 33–46 |
CaO | 20–35 |
SiO2 | 10–20 |
MgO | 3–13 |
Al2O3 | 3–6 |
Mn2O5 | 3–5 |
Cr2O3 | 1–3 |
Nebuliser | Mira Mist | ||
Spray chamber | Scott | ||
Skimmer and sampler | Ni | ||
Forward power | 1,550 W | ||
Plasma gas flow | 15.0 L/min | ||
Carrier gas flow | 1.05 L/min | 0.75 L/min | |
Dilution gas flow | 0.10 L/min | 0.45 L/min | |
He gas flow | 4.5 mL/min | ||
Quadrupole (QP) bias | −15 V | −3.6 V | |
Octapole (Oct) bias | −18 V | −8.0 V | |
Cell entrance | −40 V | −40 V | |
Cell exit | −60 V | −50 V | |
Deflect | −2.2 V | 13.4 V | |
Plate bias | −60 V | −40 V | |
Sample uptake rate | 0.3 mL/min | ||
Isotopes monitored | 52Cr, 60Ni, 63Cu, 66Zn, 75As, 78Se, 95Mo | 137Cd, 121Sb, 111Ba, 201Hg, 208Pb | |
Isotopes of internal standards | 45Sc, 72Ge, 103Rh, 115In | 45Sc, 72Ge, 103Rh, 115In |
As (mg/kg) | <0.001 | <0.001 | <0.001 | 0.5 |
Ba (mg/kg) | <0.02 | 14 | 2.2 | 20 |
Cd (mg/kg) | <0.002 | <0.002 | <0.002 | 0.04 |
Total Cr (mg/kg) | <0.002 | 1.4 | 0.95 | 0.5 |
Cu (mg/kg) | <0.001 | <0.001 | <0.001 | 2 |
Hg (mg/kg) | <0.001 | <0.001 | <0.001 | 0.01 |
Mo (mg/kg) | <0.002 | 0.26 | 0.24 | 0.5 |
Ni (mg/kg) | <0.002 | <0.002 | <0.002 | 0.4 |
Pb (mg/kg) | <0.005 | 0.45 | 0.15 | 0.5 |
Sb (mg/kg) | <0.001 | 0.08 | 0.02 | 0.06 |
Se (mg/kg) | <0.003 | <0.003 | <0.003 | 0.1 |
Zn (mg/kg) | <0.005 | 1.95 | 0.2 | 4 |
Chlorides (mg/kg) | <7 | <7 | <7 | 800 |
Fluorides (mg/kg) | <1 | 4.59 | <1 | 10 |
Sulphates (mg/kg) | <10 | 19.5 | <10 | 1000 |
pH | 8.7 | 12.5 | 12.0 | / |
As | 10.0 ± 0.1 | 10.4 ± 0.3 |
Ba | 50 ± 1 | 52 ± 1 |
Cd | 0.50 ± 0.01 | 0.48 ± 0.01 |
Total Cr | 2.00 ± 0.02 | 1.97 ± 0.02 |
Cu | 20 ± 1 | 19.6 ± 0.3 |
Mo | 10.0 ± 0.1 | 9.8 ± 0.2 |
Ni | 10.0 ± 0.1 | 10.2 ± 0.3 |
Pb | 5.0 ± 0.1 | 4.91 ± 0.01 |
Se | 2.00 ± 0.02 | 2.03 ± 0.02 |
Zn | 20 | 21.0 ± 0.2 |
Chlorides | 95.0 ± 9.50 | 92.5 ± 5.0 |
Fluorides | 1.17 ± 0.117 | 1.14 ±0.06 |
Sulphates | 44.3 ± 4.43 | 42.5 ± 2.0 |
Fe | 25,700 ± 1,300 | 24,350 ± 700 |
Mn | 910 ± 50 | 940 ± 30 |
Cr | 59 ± 4 | 61 ± 2 |