Diamond nanoparticles coating for in‐tube solid‐phase microextraction to detect polycyclic aromatic hydrocarbons

A novel, low‐cost and effective in‐needle solid‐phase microextraction device was developed for the enrichment of trace polycyclic aromatic hydrocarbons in water samples. The in‐needle solid‐phase microextraction device could be easily assembled by inserting hydrofluoric acid‐etched wires, which were used as adsorbent, into a 22‐gauge needle tube within spring supporters. Compared with the commercial solid‐phase microextraction fiber, the developed device has higher efficiency for the extraction of polycyclic aromatic hydrocarbons with four to six rings from water samples using the optimized extraction conditions. With gas chromatography equipped with a flame ionization detector, the limits of detection for the polycyclic aromatic hydrocarbons with four to six rings ranged from 0.0020 to 0.0067 ng/mL. The relative standard deviations for one needle and needle‐to‐needle extractions were in the range of 5.2–9.9% (n = 5) and 3.4–12.3% (n = 5), respectively. The spiked recoveries of the polycyclic aromatic hydrocarbons in tap water samples ranged from 73.2 to 95.4%. This in‐needle solid‐phase microextraction device could be a good field sampler because of the low sample loss over a long storage time.

Section: Validation Of the Analytical Methodssupporting

confidence: 65%

An in‐needle solid‐phase microextraction device packed with etched steel wires for polycyclic aromatic hydrocarbons enrichment in water samples

Yang

Mai

Gao

et al. 2019

“…As described in our previous report , the extraction tube was directly connected to the position of sample loop in HPLC six‐port valve. The state of six‐port valve was related to extraction and desorption processes.…”

Section: Methodsmentioning

confidence: 99%

Bare polyprolylene hollow fiber as extractive phase for in‐tube solid‐phase microextraction to determine estrogens in water samples

Sun

et al. 2019

Self Cite

Polypropylene hollow fibers as the adsorbent were directly filled into a polyetheretherketone tube for in-tube solid-phase microextraction. The surface properties of hollow fibers were characterized by a scanning electron microscope. Combined with high performance liquid chromatography, the extraction tube showed good extraction performance for five environmental estrogen hormones. To achieve high analytical sensitivity, four important factors containing sampling volume, sampling rate, content of organic solvent in sample, and desorption time were investigated. Under the optimum conditions, an online analysis method was established with wide linear range (0.03-20 μg/L), good correlation coefficients (≥0.9998), low limits of detection (0.01-0.05 μg/L), low limits of quantitation (0.03-0.16 μg/L), and high enrichment factors . Relative standard deviations (n = 3) for intraday (≤3.6%) and interday (≤5.1%) tests proved the stable extraction performance of the material. Durability and chemical stability of the extraction tube were also investigated, relative standard deviations of all analytes were less than 5.8% (n = 3), demonstrating the satisfactory stability. Finally, the method was successfully applied to detect estrogens in real samples. K E Y W O R D Sestrogen hormones, high performance liquid chromatography, online analysis, polyprolylene hollow fibers, solid-phase microextraction 2398

“…As described in our previous report , the developed extraction tube was connected to the position of sample loop of HPLC for an online in‐tube SPME‐HPLC system. Extraction process and desorption process were transformed by switching the state of six‐port valve.…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, the combined system has a great many of practical applications in many fields, such as pharmaceuticals, biochemistry, food, environmental analysis, and so on . For high efficiency, the key of in‐tube SPME is to develop efficient extraction materials .…”

Section: Introductionmentioning

confidence: 99%

Carbonized silk fibers for in‐tube solid‐phase microextraction to detect polycyclic aromatic hydrocarbons in water samples

Sun

et al. 2019

Self Cite

Silk fibers were carbonized to develop a biomass carbon material as an adsorbent for solid-phase microextraction. The surface structure of the carbonized silk fibers was characterized by scanning electron microscopy, and the graphitization degree was determined by Raman spectrometry. After carbonization under high temperature, the orderliness and structural regularity of carbon atoms on silk fibers were promoted. Extraction tube packed with carbonized silk fibers was prepared for intube solid-phase microextraction. Coupled with high performance liquid chromatography, it exhibited good extraction performance for hydrophobic polycyclic aromatic hydrocarbons. Main parameters including sampling volume, sampling rate, methanol content in sample, and desorption time were systematically investigated. Under the optimum conditions, the analysis method was established and it exhibited wide linear range (0.016-20 μg/L) with good linearity (correlation coefficient ≥ 0.9947), low limits of detection (0.005-0.050 μg/L), and high enrichment factors .Relative standard deviations (n = 3) for intraday (≤3.3%) and interday (≤9.6%) tests indicated that the extraction material had satisfactory repeatability. Finally, the analytical method was successfully applied to detect trace polycyclic aromatic hydrocarbons in real water samples, demonstrating its satisfactory practicability. K E Y W O R D Scarbonized silk fibers, high performance liquid chromatography, online analysis, polycyclic aromatic hydrocarbons, solid-phase microextraction