1. a Department of Chemistry , Middle East Technical University , Ankara , Turkey
2. b Department of Chemistry , Zonguldak Karaelmas University , Zonguldak , Turkey
3. c Department of Chemistry , Dicle University , Diyarbakır , Turkey
4. d Department of Mineral Analysis and Technology , General Directorate of Mineral Research and Exploration , Ankara , Turkey
5. e Department of Chemistry , İnönü University , Malatya , Turkey
6. f Department of Chemistry , Bozok University , Yozgat , Turkey
7. g Department of Chemistry , Ataturk University , Erzurum , Turkey