Dr. Hakan Gürleyük is the Technical Director at Brooks Applied Labs (BAL). Dr. Gürleyük develops various methods for speciation analysis using various chromatographic methods coupled to an ICP-MS as the detector. These methods provide extremely low detection limits and are used routinely for chromium, arsenic, selenium, and mercury speciation in liquid and solid matrices. In addition, Dr. Gürleyük has been working on improving the determination of trace elements in difficult matrices by ICP-MS. Dr. Gürleyük holds a PhD in Analytical Chemistry from the University of Massachusetts (Amherst, MA), a MS degree in Chemistry from Sam Houston State University (Huntsville, TX), and a BS degree in Chemistry from Boğaziçi University (Istanbul, Turkey).