Susan R. Mikkelsen, PhD, is a Professor in the Department of Chemistry at the University of Waterloo, Ontario, Canada. She has presented at numerous conferences and is the author of over 35 peer-reviewed research articles and 115 presentations. She has organized and supervised a wide variety of bioanalytical research projects and has participated in local and international collaborations in this field. She is the co-author of the first edition of Bioanalytical Chemistry. Eduardo Cortón, PhD, is Head of the Bioan?lisis and Biosensors Laboratory in the Biochemistry Department at the University of Buenos Aires, Argentina. He is also an Adjunct Professor in the Department of Biological Chemistry at the University of Buenos Aires as well as an active Independent Researcher at the National Council of Scientific and Technical Research (CONICET). He has published over 35 peer-reviewed research articles and presented at 80 conferences. He is the co-author of the first edition of Bioanalytical Chemistry.