Instrument name: Laser Ablation-Inductively Coupled Plasma-Mass Spectrometer
Instrument manufacturer: Coherent, Agilent
Instrument model: GeoLasHD Laser Ablation system, Agilent 7900 Mass Spectrometer
Application:
U-Th Pb isotope dating.
In-situ trace element analysis of minerals in micro regions.
Main technical indicators:
GeoLasHD Laser Ablation system:
Working wavelength: 193nm
Laser frequency: 1-20Hz
Energy density range: <1J/cm2–45J/cm2；
Pulse energy stability: 1% (1sigma)
Pulse width: 20ns
Laser spot size: 5~160μm
Agilent 7900 Mass Spectrometer:
Collision reaction pool: Octopole Reaction System
Quadrupole RF frequency: 3MHz
Quality range: 2-260u
Detection limit ( ppt ): 9Be<0.2ppt, 115In<0.05ppt, 209Bi<0.08ppt
Sensitivity (Mcps/ppm): 9Be>6, 115In>100, 238U>80, Background (220amu) < 1cps
Low mass side: ≤5×10-7
High mass side: ≤1×10-7
Resolution: 0.3-1.0u
Detector: Discrete Dynode Electron Multiplier
Location: C602, Building C, MUST
Appointment information: Contacts, Mr. Jin; Email address, ljin@must.edu.mo. Please handle the samples before scheduling the test.
