Abstract: A novel solid phase microextraction(SPME) fiber coated with open chain crown ether(α,ω diallyltriethlene glycol, DATEG)/hydroxy terminated silicone oil(OH TSO) was prepared by sol gel approach and cross linking step. The adsorption and desorption properties of the new SPME fiber to polar compounds such as aromatic amines, non polar compounds such as benzene homologue and high boiling compound such as phthalate esters were investigated by SPME coupled with GC FID, and the results were compared with those of commercially available fibers. The new coating provided a better extraction efficiency and possessed a significantly stable performance at a high temperature(>300 ℃) in solvents, as well as long life span(>200 times). Under the experimental conditions used, the detection limits were 0.1-1.5 μg/L for aromatic amines and 0.03-0.3 μg/L for benzene homologue, and the precisions were below 8%(n =5).

Key words: Solid phase microextraction, Sol gel process, Gas chromatography, Open chain crown ether