1. Department of Chemistry College of Science Sultan Qaboos University Al‐Khod 123 Oman
2. University of Khartoum Faculty of Science Department of Chemistry Khartoum 11114 Sudan
3. Department of Chemistry College of Science King Faisal University Al‐Hofuf Al‐Ahsa 31982 Saudi Arabia
4. Applied Analytical Chemistry Faculty of Chemistry University of Duisburg‐Essen Essen Germany