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    DETERMINATION OF BENZENE COMPOUNDS IN A DRINKING WATER DISTRIBUTION NETWORK
    (PARLAR SCIENTIFIC PUBLICATIONS (P S P), 2009) Aydin, Mehmet Emin; Yildiz, Sueheyla; Kara, Guelnihal
    Chlorinated benzenes are carcinogenic, toxic and flammable by-products of gas and coke coal production or produced from petroleum. These compounds are brought through precipitation or industrial wastes to the water sources. Chlorinated benzenes are not easily soluble in water and could be broken down by microorganisms in soil. However, they easily evaporate from waters and soils into the atmosphere. Production, use, transportation and discharge of chlorinated benzenes cause environmental pollution. In this work, EPA micro extraction method (EPA method 504) was adapted and compared with German micro extraction method (DIN 38407) for the GC/ECD analyses of 1,3-, 1,4- and 1,2-dichlorobenzenes as well as 1,2,4- and 1,2,3-trichlorobenzenes in water samples. Adaptation of micro extraction method was carried out using MTBE (methyl tert-butyl ether) instead of n-hexane, and higher recovery ratios were obtained than with German standard method (DIN 38407). Although chlorinated benzene values were not exceeding limit values given by EPA, WHO and EU in the city water distribution network, 1,3-dichlorobenzene results were observed to be near the limit values. Therefore, it is important to monitor drinking water distribution systems for such compounds.