Professor of Analytical Chemistry, Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt. He obtained his Ph.D. Analytical Chemistry (1974) Cairo University, and D. Sc. Analytical Chemistry (2015) Cairo University. The main fields of interest are spectrophotometric analysis, potentiometric determination using ion-selective electrodes. He published 459 publications and supervised more than 100 M. Sc. and Ph. D. theses. He attended 41 international conferences and was the chairman for four symposia. He is Member of editorial board in several journals. He was awarded the State encouraging award in Analytical Chemistry (1989), Medal and diploma of Excellency Egypt Arab Republic (1995), Cairo University Award of Appreciation (2005), and Arab Award in Chemistry (2010).