Laser Ablation ICP-MS
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Laser Ablation ICP-MS at the University of Gothenburg. Thomas Zack , Johan Hogmalm , Dave Cornell Department of Earth Sciences, University of Gothenburg, Sweden. Research tool : LA-ICP-MS . Flexibility and innovations possible due to compartmentalization. Microscope. Laser. ICP-MS.

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Laser Ablation ICP-MS at the University of Gothenburg

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Laser ablation icp ms at the university of gothenburg

Laser Ablation ICP-MS atthe University ofGothenburg

Thomas Zack, Johan Hogmalm, Dave Cornell

Department of Earth Sciences, University of Gothenburg, Sweden


Laser ablation icp ms at the university of gothenburg

Research tool: LA-ICP-MS

Flexibilityandinnovationspossible due tocompartmentalization

Microscope

Laser

ICP-MS

Carrier gas

Sample holder

Laser: 213 nmNd:YAGlaser, fullyautomizedstagecontrol

Sample holder: Large Format Cell (10 x 10 cm)

(bigsamples, fast wash-out, bettersensitivity)

Carrier gas: Addition ofnitrogentoenhancetransportefficiency

ICP-MS: Agilent 7500a; 2nd vacuum pump forenhancedsensitivity


Laser ablation icp ms at the university of gothenburg

Currentstatusandfuture plan

2006

2014?

+

Reaction gas (O2)

16O2+

16O2+

32S+

48Ca/48Ti, 36Ar12C

32S16O+

  • Agilent 7500a

  • Li to U (not H, C, N, O)

  • ng/g @ 100 µm, µg/g @ 4 µm

  • ..polyatomicinterferences

  • Agilent 8800

  • Tackle „difficultelements“:

  • …S, P, Cl, As, Se, Br

  • 10x more sensitive!

  • .polyatomicinterferences

32S+  32S16O+

48Ca/48Ti, 36Ar12C

Q2 (m/z 48) – rejects all ions apart from m/z 48

Q1 (m/z 32) – rejects all ions apart from m/z 32


Laser ablation icp ms at the university of gothenburg

MethoddevelopmentrelatedtoEconomicGeology

  • Halogens (Br, Cl) in minerals

  • Origin of hydrothermal fluids

  • Breakthroughs:

  • Reductionofbackground (Brtrap)

  • DetectionlimitforBr <5 ppm

  • TestingofglassstandardsforBrand Cl

Köhler et al 2008


Laser ablation icp ms at the university of gothenburg

MethoddevelopmentrelatedtoEconomicGeology

  • Traceelements (e.g., Au, PGE) in sulphides

  • Invisible gold, oredepositmodels, geometallurgy

  • Breakthroughs:

  • Availibilityofexcellentsulphidestandards (Mass-1, Po-724)

  • Standardizationwithout EMP data


Laser ablation icp ms at the university of gothenburg

MethoddevelopmentrelatedtoEconomicGeology

Traceelements (e.g., Au, PGE) in sulphides


Laser ablation icp ms at the university of gothenburg

MethoddevelopmentrelatedtoEconomicGeology

  • Other projects

  • Accessorymineraldating (rutile, monazite, titanite)

  • Magnetite fingerprinting

  • Gold in rutile

  • S andPb isotopes

  • Traceelementmapping

Large et al 2009


Laser ablation icp ms at the university of gothenburg

CollaborationsrelatedtoEconomicGeology

Boliden Larver2 master

CGS BushveldHammond

Tasman NorraKärre1 master

Agnico Eagle Dalsland1 master

LKAB Kiruna1 bachelor

Du Pont world-wideMcLimans

VedantaGamsbergMoses


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