The Concentration of Trace Metals and Hydrocarbons Depending on Water Column Depth in Caspian Sea Taken from Areas of Azerbaijan

Majid M. Ahmadov and Navai A. Ibadov

Institute of Radiation Problems of Azerbaijan NAS, 121 H.Javid aven, AZ1143, Baku, Azerbaijan.

Abstract: The present study was conducted to investigate the heavy metal contents (As, Ba, Cu, Ga, Mo, Rb, U, and V) and hydrocarbons (Total Hydrocarbons (THC) and 16EPA Polycyclic Aromatic Hydrocarbons (PAHs)) in seawater samples, which were collected at two different sites of Azerbaijan sector of the Caspian Sea. The Agilent 7700x Series ICP-MS (inductively coupled plasma mass spectrometry) with HMI (high matrix introduction) system applied to analysis seawater. Depending on concentration of elements from water columns depth can be explained in accordance with the geochemical system of classification of dissolved forms of elements in the sea water. Hydrocarbons are extracted with methylene chloride, after the extracts are cleaned on silica-gel columns and then injected into GC/FID (GC7890B, Agilent) for determination of THC and GC/MS (TRACE/DSQ, Thermo-Electron-Finnigan) operating in the selected-ion-monitoring (SIM) mode for determination of the 16EPA PAHs. The average concentrations of total hydrocarbons were below the admissible environmental levels. THC ranged from 20-29 µg/L and PAHs from <10-29 ng/L, respectively.

Keywords: ICP-MS,THC, 16EPA PAHs, GCFID, GC/MS SİM.

Pages: 378 – 390 | Full PDF Paper