氧化锌（ZnO）具有良好的化学稳定性和热稳定性，以及较强的吸附性能，可作为固相微萃取（SPME）的纤维涂层。本研究采用水热法在NiTi纤维基体表面生长交联的氧化钛氧化镍复合纳米片（TiO₂@NiOCNFs），用恒电位法在其表面成功构筑花状ZnO纳米片（ZnONFs）涂层。将制备的新型ZnONFs-TiO₂@NiOCNFs-NiTi纤维与高效液相色谱（HPLC）联用，研究了其对典型芳香族化合物的萃取性能。结果表明，所组装的新型ZnONFs纤维涂层对5种苯并三唑类紫外线吸收剂（BUVFs）有良好的萃取选择性和高的萃取效率。在的优化条件下（pH 7.0、萃取温度30℃、萃取时间40 min、解吸时间3 min、搅拌速率500 r/min、5%（w/V）NaCl），本方法对BUVFs的线性范围为0.05~200 μg/L，相关系数大于0.9988，检出限（LODs）为0.042~0.230 μg/kg。单支纤维对50 μg/L BUVFs标准混合溶液萃取测定，日内和日间相对标准偏差（RSD）分别小于6.4%和7.5%（n=5）。所建立的固相微萃取-高效液相色谱（SPME-HPLC）法用于测定不同类塑料食品包装材料中的BUVFs，回收率为83.6%~104.0%，RSD为5.5%~8.3%。此纤维性质稳定、重现性好，单支纤维能够完成整个分析过程。

Zinc oxide exhibits high chemical and thermal stability as well as desired adsorption, and can be used as excellent fiber coating of solid phase microextraction (SPME). In this study, the crosslinked titanium and nickel oxide composite nanoflakes (TiO₂@NiOCNFs) coating was in situ grown on nitinol (NiTi) wire by hydrothermal treatment, and then the flower-like zinc oxide nanoflakes (ZnONFs) coating was successfully modified onto the hydrothermally treated NiTi surface via potentiostatic method. Coupled to high performance liquid chromatography (HPLC), the extraction performance of the new ZnONFs-TiO₂@NiOCNFs-NiTi fiber was estimated by using typical aromatic compounds as model analytes. The fabricated fiber showed excellent extraction selectivity and high extraction capability for 5 kinds of benzotriazole ultraviolet filters (BUVFs) in food packaging materials. Under the optimized conditions such as pH=7.0, extraction temperature of 30℃, extraction time of 40 min, desorption time of 3 min, stirring rate at 500 r/min and 5% (w/V) NaCl, the proposed SPME-HPLC methods with ZnONFs-TiO₂@NiOCNFs-NiTi fiber showed a linearity from 0.05 to 200 μg/L with correlation coefficient (R) of higher than 0.9988. The limit of detection (LOD) ranged from 0.042 to 0.230 μg/kg, and the relative standard deviations (RSDs) were below 6.4% and 7.5% for intra-day and inter-day analysis of the 5 kinds of BUVFs at the spiking level of 50 μg/L using a single fiber, respectively. The developed SPME-HPLC method was successfully applied to selective extraction and determination of BUVFs in different types of food packaging materials with recovery of 83.6%-104.0% and RSDs of 5.5%-8.3%. Moreover, the novel fiber possessed good stability and repeatability, and the single fiber could finish all of analysis in the whole sequence.