原位制备复合碳纳米粒涂层用于环境水样中多环芳烃的高效固相微萃取

In Situ Development of Composite Carbon Nanoparticles Coatings on Nickel-titanium Fibers for Efficient Solid-phase Microextraction of Polycyclic Aromatic Hydrocarbons

通过阳极氧化法在镍钛(NiTi)丝上原位生长了双金属纳米粒(Ni Ti ONPs)层,后通过水热法和碳化处理制备了具有复合碳纳米粒涂层的纤维(NiTi@NiTiONPs@C纤维)。将其与高效液相色谱-紫外检测器(HPLC-UV)联用研究了其对多环芳烃(PAHs)的萃取性能。与其他纤维相比,NiTi@NiTiONPs@C纤维对PAHs有更好的萃取性能。在优化条件下,PAHs的线性范围为0.05~200g·L-1,LODs介于0.006g·L-1和0.127g·L-1之间。日内和日间分析的RSDs分别为4.17%~5.94%和5.71%~7.13%。实际水样的加标回收率为86.60%~112.0%。

The bimetallic oxide nanoparticles( NiTiONPs) were in situ grown on nickel-titanium(NiTi) fibers by anodization. Subsequently, the composite carbon NPs were prepared on the NiTiONPs by hydrothermal method and subsequent annealing. The NiTi fiber with the composite carbon NPs(NiTi@NiTiONPs@C fiber) was coupled to high-performance liquid chromatography with UV detection(HPLC-UV)to investigate the extraction performance for polycyclic aromatic hydrocarbons( PAHs). The results demonstrate that the NiTi@NiTiONPs@C fiber compared to other fibers exhibited good extraction efficiency for PAHs. Under the optimized conditions, the linear ranges of PAHs are 0.05 to 200 g·L-1, and limits of detection(LODs) were between 0.006 g·L-1 to 0.127 g·L-1. Relative standard deviations(RSDs) for intraday and inter-day analyses varied from 4.17% to 5.94% and 5.71% to 7.13%. The developed method was able to enrich and determinate target PAHs in real water samples and the relative recoveries of real water samples were from 86.60% to 112.0%.