1. Chemistry Department, Laboratory of Inorganic Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
2. Geology Department, Laboratory of Engineering Geology & Hydrogeology, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. Geology Department, Laboratory of Applied Geophysics, Aristotle University of Thessaloniki, Thessaloniki, Greece
4. Physics Department, Nuclear Physics Laboratory, Aristotle University of Thessaloniki, Thessaloniki, Greece