Nowadays, gas chromatography (GC) plays an important role in the identification and quantification of VOCs in the environment[4]. Conventional procedures for determination of VOCs (includ-ing BTEX) in water samples are usually carried out by GC with flame ionization detection (GC-FID) [5,6] or with mass spectrom-etry (MS) [7–9]. Some analytical methods are based on direct aqueous injection [10], but a vast majority of methods involve sample preparation steps including extraction, purification and enrichment. Liquid–liquid extraction (LLE), solid phase extraction(SPE), purge and trap (PT) [11] and headspace extraction (HS)are the most commonly employed methods, but they are costly,time consuming, and often lead to loss of analytes during sample preparation.