Table 4 The LA-ICP-MS operating conditions and data acquisition parameters.
Geolas laser ablation system | |||
Laser wavelength (nm) | 193 | Laser frequency (Hz) | 6 |
Energy density (J cm−2) | 13 | Spot diameter (μm) | 44 |
Ablation mode | Scanning-line-by-line | Distance between lines (μm) | 50 |
Scan speed (μm s−1) | 10 | ||
ICP-MS | |||
RF power (W) | 1,340 | He carrier gas (L min−1) | 0.8 |
Carrier gas (L min−1) | 1.0 | Omega lens (V) | 12.2 |
Omega bias (V) | −110 | Extraction 1 (V) | 0 |
Extraction 2 (V) | −200 | Plate bias (V) | −60 |
Scanning mode | Peak-hopping | Deflection (V) | 14.2 |
Sample depth (mm) | 6.1 | ||
Signal monitored | 55Mn+, 63Cu+, 31P+, 43Ca+, 53Cr+ | ||
