A simple method based on hollow fibre liquid phase microextraction (HF-LPME) combined with negative corona discharge ionization ion mobility spectrometry (CD-IMS) was applied for the extraction and determination of 1,2-dinitrobenzene in water and wastewater samples.The effect of different experimental variables on the extraction efficiency such as extraction solvent, stirring rate, NaCl concentration, sample volume, extraction time and temperature were studied and optimized. The method showed good linearity for determination of dinitrobenzene concentration in the rang of 1-100 µg l-1 with regression coefficient of 0.9978. Limit of detection was 0.3 µg l-1. Precision expressed in terms of relative standard deviation obtained lower than 10% for all experiments. Two different extraction systems including solvent and adsorbent filled in the lumen of the hollow fiber were compared. a composite of silica polymer network and carbon nanotubes (CNTs) was prepared with sol-gel technology.The gel containing CNTs was placed on the inner wall of the hollow fibre and used for the extraction process. The enrichment factor obtained 5 and 10 for adsorbent and solvent system, respectively. The recovery of the analyzed dinitrobenzene in real samples was in the range 89-107%.
