A Needle Extraction Device Packed with Molecularly Imprinted Polymer Functionalized Fiber for the Determination of Polycyclic Aromatic Hydrocarbon in Water
2022
Yue, Boying | Zhang, Xiaoyu | Wang, Xiyue | Lian, Lili | Gao, Wenxiu | Zhang, Hao | Hou, Shuang | Lou, Dawei
Polycyclic aromatic hydrocarbon (PAHs) is an important organic contaminant substance in the environment. Their concentration monitoring is of great significance for predicting the potential environmental risk and protecting the organism safety. Here, molecularly imprinted polymers (MIPs) coating was prepared on zylon heat-resistant fiber by in situ polymerization, which was packed to a stainless steel needle to develop a needle-type device (NTD) for the analysis of PAHs. Pyrene was used as the template molecule in this MIPs. To obtain excellent selectivity and adsorption efficiency, 4-vinylpyridine (4-VP) and ethylene glycol dimethacrylate (EDMA) were chosen as functional monomers and cross-linker, respectively, and the ratio of ingredients was optimized. The scanning electron microscope (SEM) was used for identifying micro-morphologic characteristics of the obtained MIPs-coating fiber. The PAHs from environmental water samples were extracted with the NTD by headspace extraction and detected by gas chromatography with a flame ionization detector (GC-FID). Under optimized conditions, the proposed method exhibited a good linearity dynamic range (LDR) of 0.5–1800 µg·L⁻¹ with the correlation coefficients (R²) between 0.9953 and 0.9977. The limits of detection are in the ranges of 0.09–0.40 µg·L⁻¹ and the limits of quantification are in the ranges of 0.37–1.40 µg·L⁻¹. Furthermore, the device showed remarkable durability and storage capacity. It could be reused 60 times, and the loss ratio was less than 15% with relative standard deviations (RSDs) less than 6.4% after 3 days of storage. The developed method is easy, sensitive, and accurate, and it can be used for detection of trace PAHs in water sample.
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