the scanning electron microscopy (SEM) studies on the surface of the nanocomposite coating film was shown that it has a porous, large effective surface area and homogeneous structure which is favorable for the sorption of target analytes. the thickness of the coating measured by SEM was approximately 110 um. the lifetime of the coating was such that a single fiber could be used at least 120 times. after that, the extraction recovery decreased by as much as 25.