Steve's employment at NIST began with the provision of technical support and measurement traceability to the CAP clinical survey program. This evolved into the development of primary measurement methods and assignment of certified values for trace elements in environmental, clinical and biological materials using isotope dilution mass spectrometry in support of the Standard Reference Materials program. More recently he has been involved in the development of new innovative methods for the high-accuracy determination of mercury in challenging matrices including fossil fuels, and provision of primary traceability support for the EPA regulation of coal-fired power station mercury emissions. He has authored or co-authored more than 50 peer-reviewed publications.
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