Preparation and Application of Needle Extraction Device Packed with Sol–gel-Derived Perhydroxy Cucurbit[6]uril Coating Fiber

A novel needle extraction device packed with heat-resistant fibers coated with perhydroxy cucurbit[6]uril by sol–gel technology was first developed for the analysis of polycyclic aromatic hydrocarbons in actual water samples. Its performance was tested via purge and trap microextraction coupled with gas chromatography. The strong adsorption affinity between polycyclic aromatic hydrocarbons and (OH) 12 Q[6] was attributed to C–H··· π interactions and π – π interactions. The parameters of the extraction device, such as extraction volume, extraction temperature, desorption time, ionic strength, and fiber number, were optimized. Under optimized conditions, the as-prepared extraction device showed good linearity within 0.5–1,500 µg L −1 with low detection limits (0.03–0.2 µg L −1 ). Moreover, the durability of the needle extraction device was excellent and can be used for 60 cycles. Furthermore, the loss rates of the coating fiber were less than 10% after storage for 3 days at room temperature, and the RSD was less than 6.4%.