1. a Department of Chemistry, Faculty of Science , Trakya University , Edirne , Turkey
2. b Department of Analytical Chemistry, Faculty of Pharmacy , Marmara University , Istanbul , Turkey
3. c Biological and Medical Research Department (MBC 03‐65), Pharmaceutical Analysis Laboratory , King Faisal Specialist Hospital and Research Centre , P.O. Box 3354, Riyadh , 11211 , Saudi Arabia