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understanding earth through isotopes WSU RIGL



HEPA Class 1000 Clean Lab


A HEPA-filtered 900 square feet ~class 1000 clean laboratory is used to perform chemical separations of Lu-Hf, Sm-Nd, Rb-Sr, U-Th-Pb, and HFSE using column chromatography.

The clean lab is full service with low-blank distilled water, quartz and Savillex stills for generating low-blank HCl, HNO3, and HF acids, calibrated mixed Lu-Hf, Sm-Nd, and Rb-Sr spikes, and ion-exchange columns for Lu-Hf, Rb-Sr, Sm-Nd, U-Th-Pb, and HFSE separations.

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Thermo-Finnigan Element2 HR-ICP-MS


The high resolution single collector ICP-MS (HR-ICP-MS), a Finnigan Element2, is capable of analyzing elements in solution at concentrations as low as parts per quadrillion (see table above) and has a dynamic range of over 9 orders of magnitude. The Element2 is a double focussing, reverse Nier-Johnson geometry spectrometer with 3 selectable mass resolutions (M/ ΔM of 400, 3000 and 10,000). By using increased resolution, most isobaric interferences can be resolved during the analysis, minimizing the need for extensive sample processing. At low resolution the Element2 has a sensitivity of >1.5x10e9 counts/ppm at 115Indium.

When used with the Aridus desolvating nebulizer, the Element2 can be used for determination of REEs in small samples, or samples with low REE abundances. A Cetac ASX-100 auto-sampler is available for automated sequences along with a HEPA-filtered work enclosure for minimization of environmental contamination to samples.

The Element is also extremely useful for our everyday lab quality control (lab blanks, reagent blanks, column calibration, exact sample contents for MC-ICP-MS analyses).

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Thermo-Finnigan Neputune Multi-Collector ICP-MS


A ThermoFinnigan Neptune MC-ICPMS is equipped in the Radiogenic Isotope and Geochronology Laboratory at Washington State University. The Neptune is a doubly focusing, plasma source multi-collector mass spectrometer that offers high elemental sensitivities (~80V/ppm Hf at an aspiration rate of 0.05 ml/min). The Neptune has nine movable Faraday collectors and one high-sensitivity ion-counting electron multiplier. This collector configuration has wide-ranging utility in measuring high precision isotope ratios in a variety of isotopic systems. We are routinely measuring isotope ratios for the radiogenic isotope systems Lu-Hf, Sm-Nd, Rb-Sr, and Pb and the heavy stable isotope systems Cu, Fe, and Mo.

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TELEDYNE Analyte Excite Laser Ablation System


High-precision in-situ laser ablation U-Pb gechronology coupled with Element2
  • Zircon U-Pb dating
  • Monazite U-Pb dating
  • Titanite U-Pb dating
  • Rutile U-Pb dating
High-precision in-situ laser albation Hf-Nd isotope determination coupled with Neptune
  • Zircon Hf isotope composition
  • Monazite Nd isotope composition
  • Titanite Nd isotope composition
  • Apatite Nd isotope composition
  • Allanite Nd isotope composition
Laser Ablation Split Stream (LASS) coupled with both Neptune and Element2


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