Elements/ Isotopes Method Species Buffer Separation conditions LOD Ref. Lanthanides, Cs-133,134, 135, 137, Ba-134,135, 136,138 CE-ICP-QMS/ CE-ICP-SFMS different isotopes and elements 15 mM Phosphate pH 2.5 for Cs / 0.8 mM picolinic acid, 10 mM HIBA, 25 mM formic acid pH 4.7, adjusted with Tris hydrodynamic injection, separation at 30 kV QMS: 6 µgCs L-1 / 8 µgLn L-1/ SFMS: 9 ng Cs L-1 / 7 ngLn L-1 [28] Eu-153, Gd-158 CE-ICP-MS Eu3+, Eu-HA, Gd3+, Gd-HA 100 mM acetic acid + 10 mM Na-acetate, pH 3.7 hydrodynamic injection, separation at 30kV + 3psi 100 ng L-1 [35,36] Nd-146 CE-ICP-MS Nd-FA / Nd-EDTA     500 pmol L-1 [33] Np-237 CE-ICP-MS NP(V), NP(IV) 1 M acetic acid, pH 2.4 hydrodynamic injection, separation from 15 to 30kV NP(IV) 1 nmol L-1 Np(V) 0.5 nmol L-1 [30] Pu-239, Np-237 CE-ICP-SFMS NpO2+; NpO2-carbonates; PuO2+; PuO2-carbonates 100 mM Na2CO3, 50 mM Good buffer, 2 mM tetradecyl-trimethyl-ammonium bromide pH 5.3 -11.5 10 kV / -10 kV in dependency of pH 1 pmol L-1 [31] Pu-239, Np-238 CE-ICP-MS NpO2+; NpO2-clorides, sulfates;  PuO2+; PuO2-chlorides, sulfates 0-0.15 M Na2SO4; 0-1 M NaCl; pH 6 hydrodynamic injection; separation from 5 to 10 kV at 0.8 psi 1 pmol L-1 [32] Np-237, U-238, La; Th CE-ICP-MS NpO2+; UO22+; La3+, Th4+ 1 M acetic acid, pH 2.4   50 µg L-1 [29] U-238 CE-ICP-MS UO22+, UO2-HA 100 mM acetic acid + 10 mM Na-acetate, pH 3.8 hydrodynamic injection, separation at 30 kV + 2psi 50 ng L-1 [37] Pa-233 CE-ICP-MS PaO(C2O4)+; PaO(C2O4)2-; PaO(C2O4)32- 0.5 M oxalic acid hydrodynamic injection, separation at -3kV and 0.8psi 1 pmol L-1 [40]

Table 1: Application of CE-ICP-MS for metal speciation in spiked geological samples

Goto home»