Highly efficient solid‐phase microextraction of polycyclic aromatic hydrocarbons in water based on worm‐like nickel‐titanium oxide nanocomposites coating grown on a nickel‐titanium alloy wire by low‐voltage anodization

Abstract

A novel worm‐like nickel‐titanium oxide nanocomposite coating was directly grown on a nickel‐titanium alloy wire by low‐voltage electrochemical anodization in alkaline ethylene glycol and water solution. The in situ growth of nickel‐titanium oxide nanocomposites greatly depended on the volume ratio of ethylene glycol to water and temperature. Coupled to high‐performance liquid chromatography with UV detection by static desorption in the mobile phase, the adsorption performance of the as‐prepared fiber was evaluated for solid‐phase microextraction of representative environmental analytes in water. The results indicate that the as‐prepared fiber exhibits higher extraction capability for polycyclic aromatic hydrocarbons than commercial polydimethylsiloxane and polyacrylate fibers. After optimizing the extraction parameters, the calibration graphs of the developed method was linear in the range of 0.05–200 μg/L with correlation coefficients above 0.998. Limit of detection ranged from 0.013 to 0.145 μg/L for seven target analytes. Relative standard deviations of intraday and interday analyses varied from 4.0 to 5.3% and from 4.7 to 6.3% with the single fiber, respectively. The relative recoveries of 84.4–109% were achieved for highly efficient enrichment and determination of target analytes in spiked river and snow water. Moreover, the as‐prepared fiber can be used more than 200 times.

Selective solid‐phase microextraction of polycyclic aromatic hydrocarbons in water based on oriented phosphorus‐containing titanium oxide nanofibers grown on titanium support prior to high‐performance liquid chromatography with ultraviolet detection

“…As shown in Table S2, the linear ranges of the established method are wider than the reported methods [13,23,40,41]. Furthermore, the extraction time is shorter than some reported ones [13,22,23,37,39]. LODs are also lower than those of the ESS@MoO 3 ‐SPME‐GC‐FID method [38] or comparable to those of some other methods [13,37].…”

“…Furthermore, the extraction time is shorter than some reported ones [13,22,23,37,39]. LODs are also lower than those of the ESS@MoO 3 ‐SPME‐GC‐FID method [38] or comparable to those of some other methods [13,37]. Meanwhile, the established method also has satisfactory RSDs and recoveries compared with some methods [13,22,23,39,41].…”

Triazine‐based covalent organic polymer: A promising coating for solid‐phase microextraction

“…However, their limited diversity is not always satisfactory due to the large variety of analytes [15]. Recently, to meet the diverse analytical requirements, various porous materials have been synthesized as novel SPME coatings, for example, graphene [16,17], carbon nitride [18,19], metal/metal oxide nanoparticles [20,21], metal-organic frameworks (MOFs) [22][23][24][25], and covalent organic frameworks [26][27][28].…”

Evaluation of three sorbent‐phase extraction techniques based on hyper‐crosslinked polymer for the extraction of five endocrine disrupters in water

“…But complex operations, long extraction times, and large usage of organic solvents often emerge in their procedures. Hence, several efficient sorbent-based extraction methods such as micro-SPE (μ-SPE) [10], dispersive SPE (DSPE) [11], SPME [12] have been very well-received in recent years.…”