Leila Gharehaghaji Azar - Department of Chemistry, Faculty of Science, Maragheh University, Maragheh, Iran
Mohammad Taghi Vardini - Department of Chemistry, Faculty of Science, Maragheh University, Maragheh, Iran
Mir Mehdi Abolghasemi - Department of Chemistry, Faculty of Science, Maragheh University, Maragheh, Iran

The feasibility of headspace (HS) SPME for the determination of high-ring polycyclic aromatic hydrocarbons (PAHs) in water samples is studied. In this study, the possibility of extracting PAHs by utilizing nanostructures, PW/SBA-15/DABCO, using new synthetic solid phase microextraction methods. Parameters affecting the sorption of PAHs into the fiber such as sampling time, sampling volume, and temperature are also evaluated. The extraction efficiency decreases with the increasing molecular weights of PAHs. For HS-SPME, the extraction efficiency of PAHs decrease when the headspace volume of the sampling system increases. All high-ring PAHs can be detected in a water sample by increasing the temperature to 80°C. In this study, a new synthetic solid phase microextraction is used in which the PW/SBA-15/DABCO with nanocomposite is applied for extraction and identification PAHs; the high specific surface area, selectivity, shape and size are the main characteristics of these compounds leading to numerous fibers applications, filtration, separation and extraction of PAHs. The optimization conditions for this process include the extraction temperature: 80° C, extraction duration: 30 minutes, desorption temperature: 270 C, desorption duration: 2 minutes. Also, the correlation coefficient was high (0.997) and linear range was broad (…… to …. ng/ml).