Analysis of some volatic organic compounds in media air with active air sampling technique

Monitoring of volatile organic compounds (VOCs) in air samples have attracted considerable interest due to their hazardous effect to human and also to environment in recent years. In this work, a cheap method was developed for the analysis of ethyl benzene, p-xylene, m-xylene, o-xylene, styrene, p- dichlorobenzene, nonanal and benzaldehyde in air samples. For this purpose, the filter coffee wastes were used as a starting material for the preparation adsorbents. Four different adsorbents were prepared from this material by using different processes. Then adsorption tubes were prepared from these adsorbents for the sampling of VOCs in air samples. For this purpose, suitable amount of adsorbent was tightly filled inside of the glass tube. Then, targeted VOCs in air samples adsorbed inside of this adsorption tubes. After adsorption process, adsorbed VOCs eluted by carbondisulphide (CS2) and analysis of VOCs in CS2 phase were performed by gas chromatographic technique. The results were also compared with the commercial activated carbon and the best results were obtained with 200- 1 coded adsorbent. Optimization of the preposed method with 200-1 coded adsorbent was performed under optimize conditions and calibration curves of the each targeted VOCs were performed. The limit of detection (LOD), limit of quantification (LOQ), linear range, intraday repeatability and interday reproducibility of the method for each compounds were calculated and acceptable results were obtained. The proposed method was successfully applied for the analysis of targeted compounds in air samples.