期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1468, 期 -, 页码 33-41出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2016.09.038
关键词
Titanium and nickel oxide composite; nanosheets; Hydrothermal growth; Nitinol; Solid phase microextraction; Aromatic compounds; Environmental water
资金
- National Natural Science Foundation of China [21265019]
A novel titanium and nickel oxide composite nanosheets (TiO2/NiOCNSs) coating was in situ grown on a Nitinol (NiTi) wire by direct hydrothermal treatment and modified by self-assembly of trichlorophenylsilane for solid phase microextraction (SPME). TiO2/NiOCNSs were radially oriented and chemically bonded to the NiTi substrate with double-faced open access sites. Moreover the phenyl modified TiO2/NiOCNSs (TiO2/NiOCNSs-Ph) coating exhibited original surface supporting framework favorable for effective SPME. The extraction performance of TiO2/NiOCNSs-Ph coated NiTi (NiTi-TiO2/NiOCNSs-Ph) fiber was investigated for the concentration and detection of ultraviolet (UV) filters, polycyclic aromatic hydrocarbons (PAHs), phthalate acid esters and polychlorinated biphenyls coupled to HPLC with UV detection. The novel fiber exhibited better selectivity for UV filters and PAHs and presented greater extraction capability compared to commercial polydimethylsiloxane and polyacrylate fibers. Under the optimized conditions for SPME of UV filters, the proposed method presented linear ranges from 0.1 to 300 mu g/L with correlation coefficients of higher than 0.999 and limits of detection from 0.030 mu g/L to 0.064 mu g/L. Relative standard deviations (RSDs) were below 7.16% and 8.42% for intra-day and inter-day measurements with the single fiber, respectively. Furthermore RSDs for fiber-to-fiber reproducibility from 6.57% to 8.93% were achieved. The NiTi-TiO2/NiOCNSs-Ph fiber can be used up to 200 times. The proposed method was successfully applied to the preconcentration and determination of trace target UV filters in different environmental water samples. The relative recoveries from 87.3% to 104% were obtained with RSDs less than 8.7%.(C) 2016 Elsevier B.V. All rights reserved.
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