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Steve Shen

Steve Shen

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352


Steve Shen has three years of experience in multi-collector mass spectrometry. Joining PNNL as a post-bachelor’s research associate in January 2016, he has been working on various high precision mass spectrometry techniques under the guidance of Dr. Eirik Krogstad. His initial focus was on enhancing ionization efficiency for actinides for Thermal Ionization Mass Spectrometry (TIMS), but has since transitioned to both method development of as well as day to day analyses by Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Along with Alex Mitroshkov, he is the primary steward of the three NuInstruments multi-collector ICP-MS in the 331 Life Sciences building, and his work supports a broad range of studies ranging from fish ecology to nuclear non-proliferation.

Research Interests

  • Multi-Collector ICP-MS
  • Applied isotopic research
  • Actinides in the environment

Education and Credentials

  • B.A., Atmospheric Science, University of California, Berkeley

Awards and Recognitions

  • 2017 - Outstanding Performance Award
  • 2016 - Outstanding Performance Award

PNNL Publications


  • Lackey H.E., D.R. Bottenus, M. Liezers, S.D. Shen, S.D. Branch, J.A. Katalenich, and A.M. Lines. 2020. "A versatile and low-cost chip-to-world interface: enabling ICP-MS characterization of isotachophoretically separated lanthanides on a microfluidic device." Analytica Chimica Acta 1137. PNNL-SA-151307. doi:10.1016/j.aca.2020.08.049


  • Johns J.M., E.J. Krogstad, S.D. Shen, D.D. Reilly, and B.D. Reid. 2019. "Hafnium Isotope Ratio Method for Enhanced Safeguards at Research Reactors." In 41st ESARDA Annual Meeting Symposium on Safeguards and Nuclear Non-Proliferation, May 14-16, 2019, Stresa, Italy, 731-743. PNNL-SA-143516.
  • Pellegrini K.L., C.Z. Soderquist, S.D. Shen, E.J. Krogstad, C.J. Palmer, K. Gerez, and E.C. Buck, et al. 2019. "Chemical and Isotopic characterization of noble metal phase from commercial UO2 fuel." Analytical Chemistry 91, no. 10:6522-6529. PNNL-SA-138098. doi:10.1021/acs.analchem.8b05549


  • Cantrell K.J., I.I. Leavy, M. Snyder, S.R. Baum, S.D. Shen, B.D. Williams, and S.A. Saslow, et al. 2018. Off-Gas Condensate and Cast Stone Analysis Results. PNNL-27765. Richland, WA: Pacific Northwest National Laboratory. doi:10.2172/1476714.Off-Gas Condensate and Cast Stone Analysis Results


Additional Information