Selective and efficient solid-phase microextraction of polycyclic aromatic hydrocarbons in water by robust two-dimensional zinc oxide nanosheets grown on a superelastic nickel–titanium alloy fiber prior to determination by HPLC-UV,Analytical Methods

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Selective and efficient solid-phase microextraction of polycyclic aromatic hydrocarbons in water by robust two-dimensional zinc oxide nanosheets grown on a superelastic nickel–titanium alloy fiber prior to determination by HPLC-UV
Analytical Methods ( IF 2.7 ) Pub Date : 2020-09-17 , DOI: 10.1039/d0ay01469a
Hua Zhou _{1,

2,

3,

4} , Pei Liu _{1,

2,

3,

4} , Junliang Du _{1,

2,

3,

4} , Feifei Wang _{1,

2,

3,

4} , Xuemei Wang _{1,

2,

3,

4,

5} , Xinzhen Du _{1,

2,

3,

4,

5}

Affiliation

Oriented zinc oxide nanosheets (ZnONSs) were directly grown on pretreated nickel–titanium alloy (NiTi) fiber substrates without a traditional seeding layer of ZnO by electrochemical deposition for the first time. The fiber coatings were characterized by scanning electron microscopy and energy dispersive X-ray spectrometry. Direct growth of ZnONSs on the NiTi fiber substrate was dependent on the type of zinc salt. The adsorption performance of the ZnONSs coatings was evaluated using representative aromatic compounds as model analytes together with high performance liquid chromatography with ultraviolet detection. The as-prepared fiber shows higher extraction capability for the selected polycyclic aromatic hydrocarbons (PAHs) than for ultraviolet filters in water samples, and better extraction selectivity for PAHs. For this purpose, the important experimental parameters were optimized for the extraction of PAHs. Under the optimized conditions, the calibration curves are linear in the range of 0.03–200 μg L⁻¹ with correlation coefficients greater than 0.999. Limits of detection ranged from 0.011 μg L⁻¹ to 0.082 μg L⁻¹. Intra-day and inter-day relative standard deviations (RSDs) of the developed method with a single fiber ranged from 2.69% to 4.18% and from 4.44% to 5.40%, respectively. RSDs for the fiber-to-fiber reproducibility varied between 5.57% and 7.66%. The developed method was successfully applied for selective preconcentration and determination of trace PAHs in five real water samples. Relative recoveries varied from 84.5% to 104% with RSDs between 1.65% and 8.30%. Furthermore, the as-prepared fiber is highly stable.

中文翻译：

在HPLC-UV测定之前，通过在超弹性镍钛合金纤维上生长的坚固的二维氧化锌纳米片对水中的多环芳烃进行选择性和高效的固相微萃取

定向的氧化锌纳米片（ZnONSs）首次通过电化学沉积直接在预处理的镍钛合金（NiTi）纤维基材上生长，而没有传统的ZnO籽晶层。纤维涂层通过扫描电子显微镜和能量色散X射线光谱法表征。ZnONS在NiTi纤维基材上的直接生长取决于锌盐的类型。使用代表性的芳香族化合物作为模型分析物以及具有紫外检测功能的高效液相色谱法，对ZnONSs涂层的吸附性能进行了评估。所制备的纤维显示出对选定多环芳烃（PAHs）的萃取能力高于对水样品中的紫外线过滤器的萃取能力，并且对PAHs的萃取选择性更高。以此目的，优化了重要的实验参数以提取多环芳烃。在最佳条件下，校准曲线在0.03–200μgL范围内呈线性^-1，相关系数大于0.999。检测限为0.011μgL^-1至0.082μgL^-1。使用单根纤维开发的方法的日内和日间相对标准偏差（RSD）分别为2.69％至4.18％和4.44％至5.40％。光纤到光纤的重现性的RSD在5.57％和7.66％之间变化。所开发的方法已成功用于选择性富集和测定五个真实水样中的痕量PAHs。相对回收率从84.5％到104％不等，RSD在1.65％和8.30％之间。此外，所制备的纤维是高度稳定的。

更新日期：2020-11-03

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