Nano‐MoO₃ for highly selective enrichment of polycyclic aromatic hydrocarbons in in‐tube solid‐phase microextraction

Abstract

Nano‐molybdenum trioxide was prepared from nano‐molybdenum disulfide by simple firing in muffle furnace. Nano‐molybdenum trioxide was used as the extraction coating on the stainless steel wire. Four wires were filled in a polyetheretherketone tube to get an extraction tube. The tube was connected to the six‐port valve of a high performance liquid chromatograph, and the online analysis system was constructed. Extraction selectivity of the tube for different types of compounds, including polycyclic aromatic hydrocarbons, plasticizers, estrogens, anilines and neonicotinoids, was studied. Good enrichment ability for polycyclic aromatic hydrocarbons, but the extraction efficiency of others was not satisfactory. Using eight polycyclic aromatic hydrocarbons as the targets, an analytical method was established after optimizing main factors such as sampling volume, sampling rate, methanol content, and desorption time. The established method exhibited wide linear range to 0.016–20.00 μg/L and low limits of detection to 0.005 μg/L, and the enrichment factors can be up to 2443. The method was applied to the detection of trace polycyclic aromatic hydrocarbons in tap water and river water, and a good recovery was obtained. The tube showed good durability and chemical stability, and it still remained good extraction effect after more than 140 run.

Carbon nanotubes functionalized mesoporous silica for in‐tube solid‐phase microextraction of polycyclic aromatic hydrocarbons

“…The method exhibits the wider linear range than in-tube SPME-HPLC-DAD method based on ionic liquid-bonded basalt fibers and ZIF-8-PDA-SPME-HPLC-FLD method. Furthermore, it is comparable to Nano-MoO 3 in-tube SPME-HPLC-DAD [16] and diamond nanoparticles-coated in-tube SPME-HPLC-DAD methods [37]. The F E values of this method are larger than some method, but the extraction time is relative less.…”

“…The development of efficient sorbents is very important for SPME. For several decades, various materials have been applied to the extraction coating such as mesoporous materials [7][8][9], ionic liquids [10,11], carbon materials [12][13][14], metal oxides [15][16][17], aerogels [18,19], metal organic frameworks [20,21], and so on. There are certain common characteristics in excellent extraction coatings such as large specific surface, high adsorption capacity, good selectivity, and well durability.…”

“…To solve above problems, a type of extraction tube via filling the fibers in PEEK tube was developed in our previous works [18], in which various extraction materials could be coated on the wires or fibers for in-tube SPME. We have introduced aerogels [18], graphene oxide [35], ionic liquids [11], polydopamine [36], diamond nanoparticles [37], and nano-MoO 3 [16] for in-tube SPME. In order to enrich the extraction coatings and promote the development of in-tube SPME, the mesoporous silica material with excellent property was introduced in this research.…”

Resorcinol–formaldehyde aerogel coating for in‐tube solid‐phase microextraction of estrogens

“…Solid‐phase microextraction (SPME) has significant advantageous over above methods , such as no or less solvent, time‐saving, high sensitivity, convenient combination with chromatographic detection, etc . The extraction performance is mainly decided by the sorbent, so the efficient materials have been developed for SPME, including ionic liquids , metal organic frameworks , covalent organic frameworks , graphene , graphitic carbon nitride , mesoporous materials , and functional nanomaterials . There are some common properties in these high‐performance coatings, such as high surface area, excellent adsorption ability and selectivity, large porousness, good durability, and chemical stability.…”

Nanostructured Silver Coating as a Stationary Phase for Capillary Gas Chromatography

“…Nanoparticles have attracted great attention due to their unique properties and potential in separation science. Various nanoparticles were applied for solid-phase extraction [1][2][3], solid-phase microextraction [4][5][6][7], removal of pollutants [8,9], and chromatographic stationary phase [10,11]. Carbon nanomaterials like carbon nanotubes (CNTs) and graphene oxide (GO) were used as the stationary phases for gas chromatography (GC), which exhibited excellent separation performance for various organic compounds.…”