Table 1 LA-ICP-MS operating conditions with optimum parameters given in parentheses
From: High spatial resolution analysis of ferromanganese concretions by LA-ICP-MS†
Rf power/W | 1100–1500(1300) |
Argon gas flow rates/1 min-1 | |
Coolant | 15.3 |
Auxiliary | 1.00 |
Nebuliser | 0.6–1.6 (LA 1.25, SN 0.90) |
Ion sampling depth/mm | 9 |
Ion lens settings | Adjusted to obtain maximum signal intensity |
Torch | Fassel 1.5 mm i.d. Injector |
Nebuliser | Micromist, Glass Expansion, Romainmotier, Switzerland |
Spray chamber | Scott type PFE (double-pass) |
Sample cone | Nickel, 1.1 mm orifice diameter |
Skimmer | Nickel, 0.8 mm orifice diameter |
Laser (Nd:YAG) | |
Wavelength/nm | 266 |
Pulse width/ns | 3 |
Pulse energy/mJ | 0.1–3.0(1.0) |
Ablation diameter/μm | 5–50 (20) |
Distance between points/μm | 30–50 (30) |
Repetition rate/Hz | 1–20 (8) |
Number of shots per point | 1–99 (20) |
Sample scan mode | Line or raster scan across (line for standard, raster for concretion analysis) |
Time delay/s | 0.1 |