Mohammad Reza Ganjali is Professor of Analytical Chemistry, Head of the Centre of Excellence in Electrochemistry, and Dean of the College of Science at the University of Tehran, Tehran, Iran. He obtained a PhD in analytical chemistry at the University of Tehran in 1997. He has published more than 580 research articles and reviews in international journals. His research work has focused on the design and construction of new electrochemical and optical sensors for different species, in particular lanthanide ions. He proposed a new theory that made possible the design and synthesis of selective sensing materials for lanthanide ions. Most of the first electrochemical sensors for the lanthanide family have been reported by him, and more than 70% of electrochemical lanthanide sensors in the world are related to his work and his research team. Dr. Vinod Kumar Gupta is Professor of Chemistry at Indian Institute of Technology Roorkee, Roorkee, India, and is currently working as SARCHI Chair Professor in the Applied Chemistry Department at the University of Johannesburg, Johannesburg, South Africa. He has published more than 500 papers with 37,000 citations and an h-index of 127. He is editor of many journals and is on the editorial board of more than 20 international journals. He has more than 30 years of research experience in environmental engineering, electro-analytical chemistry, chemical sensors, and waste management. Farnoush Faridbod is Assistant Professor at the Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran. Parviz Norouzi is a Professor in Electrochemistry at the Center of Excellence in Electrochemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran.