at the University of Gothenburg Thomas Zack Johan Hogmalm Dave Cornell Department of Earth Sciences University of Gothenburg Sweden Research tool LAICPMS Laser ID: 509945
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Slide1
Laser Ablation ICP-MS at the University of Gothenburg
Thomas
Zack
, Johan
Hogmalm
,
Dave Cornell
Department of Earth Sciences, University of Gothenburg, SwedenSlide2
Research tool: LA-ICP-MS
Laser
Sample holder
Microscope
ICP-MS
Flexibility
and
innovations
possible
due
to
compartmentalization
Carrier gas
Laser: 213
nm
Nd:YAG laser, fully automized stage control
Carrier gas: Addition of nitrogen to enhance transport efficiency
(
big samples, fast wash-out, better sensitivity)
Sample holder: Large Format Cell (10 x 10 cm)
ICP-MS: Agilent 7500a; 2nd
vacuum
pump
for
enhanced
sensitivitySlide3
2014?
Agilent 8800
Tackle
„
difficult
elements“:…S, P, Cl, As, Se,
Br10x
more sensitive!.
polyatomic interferences
+
Current
status and
future plan
Agilent 7500aLi to U (not H, C, N, O)
ng/g @ 100 µm, µg/g @ 4 µm..
polyatomic interferences
2006
32
S
16
O
+
16
O2+
32
S
+
48
Ca/
48
Ti,
36
Ar
12
C
48
Ca/
48
Ti,
36
Ar
12
C
Reaction gas
(O
2
)
32
S
+
32
S
16
O
+
Q1 (m/z 32) – rejects all ions apart from m/z 32
Q2 (m/z 48) – rejects all ions apart from m/z 48
16
O
2
+Slide4
Method development related to Economic
Geology
Halogens (
Br
, Cl) in
minerals
Origin
of hydrothermal
fluidsBreakthroughs:
Reduction of
background (Br trap
)Detection limit
for Br <5 ppm
Testing of glass standards
for Br
and Cl
Köhler et al 2008Slide5
Method development related to Economic
Geology
Trace
elements
(e.g., Au, PGE) in
sulphides
Invisible gold
, ore deposit
models, geometallurgy
Breakthroughs:Availibility
of excellent sulphide
standards (Mass-1, Po-724)Standardization
without EMP dataSlide6
Method development related to Economic
Geology
Trace
elements
(e.g., Au, PGE) in
sulphidesSlide7
Method development related to Economic
Geology
Other
projects
Accessory
mineral
dating
(rutile, monazite,
titanite)Magnetite
fingerprintingGold in rutile
S and Pb isotopes
Trace element mapping
Large et al 2009Slide8
Collaborations related to Economic Geology
Boliden
Larver
2
master
CGS
Bushveld
Hammond
Tasman Norra
Kärre 1 master
Agnico Eagle Dalsland 1
masterLKAB Kiruna 1
bachelorDu Pont world-wide
McLimansVedanta Gamsberg
Moses