Wavelength |
193nm |
Pulse Duration |
20ns |
Spot Size (U-Pb analysis) |
110μm, (75μm - NIST614) |
Spot Size (Elemental mapping) |
91x91 (75μm NIST612) |
Repetition Rate |
10Hz |
Energy Attenuation |
100%T (50% NIST612) |
Laser Fluency |
8 j/cm2
|
ICPMS |
|
Brand and Model |
Agilent 7900x |
Forward Power |
1350W |
Torch Depth |
4.5mm |
Gas Flows |
|
Plasma (Ar)
Auxiliary (Ar)
|
15L/min
1L/min
|
Carrier (He) |
07L/min |
Sample (Ar) |
0.88L/min |
Data Acquisition Parameters |
|
Data Acquisition Protocol |
Time resolved analysis |
Scanned Isotopes (U-Pb analysis) |
43Ca, 202Hg 204Pb, 206Pb, 207Pb,
208Pb, 232Th 238U |
Scanned Isotopes (elemental mapping) |
23Na, 25Mg, 27Al, 29Si, 43Ca,
55Mn, 56Fe, 88Sr, 130Ba, 139La, 140Ce, 141Pr, 146Nd, 147Sm, 153Eu,
157Gd, 159Tb, 163Dy, 165Ho, 166Er, 169Tm, 172Yb, 175Lu, 202Hg, 204Pb,
206Pb, 207Pb, 208Pb, 232Th, 238U |
Detector Mode |
Peak Hopping, Pulse & Analog counting |
Background Collection |
30 (NIST612) 10 (mapping) |
Ablation for Age Calculation |
30 (ablation time for mapping varied by
line length) |
Washout |
20 |
Standards |
|
Primary Standards (U-Pb analysis) |
NIST614 |
Secondary Standards (U-Pb analysis) |
WC-1, ‘Prague’ |
Primary Standards (elemental mapping) |
NIST612 |