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Duration:60 minutes


Along with rice and apple juice, seafood and seaweed are major sources of human exposure to dietary arsenic. Although toxic inorganic chemical forms of arsenic such as arsenate or arsenite are well understood, the safety and toxicity of arsenosugars and lipid-soluble arsenicals are still under debate. The literature is limited in terms of the methods and sample groups used for such analyses, but the range and variation of arsenic in each species affect its characterization and quantitation.


Attend this webinar to hear Dr. Mesay Wolle, Research Fellow at the US FDA/CFSAN, discuss the origins of arsenic in seafood. He will also explain why arsenic is not always harmful to human health and provide expertise on sample preparation and chromatographic methods needed to accurately analyze arsenic speciation in seafood. The discussion will include a topical overview of new methodology developed recently at the FDA/CFSAN, for extracting, separating and quantifying arsenic in finfish, crustaceans, mollusks and seaweed.


Following Dr. Wolle’s presentation, Michael Murphy, Technical Director at Metrohm USA, will present commonly used ion chromatography solutions that help ensure the safety of foods. 

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Dr. Mesay Wolle

Dr. Mesay Wolle is a research Fellow at the US Food and Drug Administration’s (FDA) Center for Food Safety and Applied Nutrition, in College Park, Maryland. As an accomplished analytical chemist with years of research, he is experienced in the use of several analytical techniques including mass spectrometry (ICP-MS, LC-MS/MS), atomic spectrometry (ICP-OES), and chromatography. His expertise spans the areas of elemental and molecular speciation analysis, isotope dilution mass spectrometry, wastewater management, and pesticide residue analysis. Dr. Wolle’s background includes tenures at Duquesne University as a Research Associate and as an adjunct Research Scientist at Applied Isotope Technologies, both in Pittsburgh, Pennsylvania. He holds a PhD in Analytical and Environmental Chemistry from the University of Oslo, Norway, and a Masters in Analytical Chemistry from Addis Ababa University in Ethiopia.

Michael Murphy

Michael is the Technical Director at Metrohm USA overseeing Laboratory and Training operations. Michael joined Metrohm USA in 2014 as the Technical Support Manager and quickly assumed additional responsibilities leading in-house service repair operations and production of process instrumentation. Prior to joining Metrohm USA, Michael worked as a National Service Manager, Product Manager, Compliance Manager, Training Supervisor and Technical Instructor for Thermo Fisher Scientific. Michael earned his B.A. in Chemistry from Southern Illinois University at Carbondale and his Ph.D. in Analytical Chemistry from the University of Georgia in Athens. Following his graduate work, Michael was a visiting scientist at the Counterterrorism and Forensic Science Research Unit of the FBI where he focused on the analysis of forensic samples of interest using FT-IR and Raman spectroscopy.

(Moderator) Barbara VanRenterghem, Ph.D

Editorial Director
Food Safety Magazine


Solutions for Challenges in Extraction and Quantitation of Arsenic in Food
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