Direct synthesis of nitrogen-doped graphene on platinum wire as a new fiber coating method for the solid-phase microextraction of BXes in water samples: Comparison of headspace and cold-fiber headspace modes

Advances in Solid Phase Microextraction and Perspective on Future Directions

“…3 Another study involved the preparation of a new graphene oxide CF SPME device, which was prepared for the extraction of alkyl-benzenes from a more complex wastewater sample. 322 Although not as difficult of a matrix as soil, the methodology was able to show the effectiveness of a thermoelectrically cooled SPME device to reliably quantitate VOCs from a complex matrix. Despite these advancements, neither of these apparatus explore an automatable approach for soil sampling.…”

“…The main advantage to this technique is that it can be adopted at relatively low cost for manual CF implementation; however, it does lack the automation seen by other CF methodologies . Another study involved the preparation of a new graphene oxide CF SPME device, which was prepared for the extraction of alkyl-benzenes from a more complex wastewater sample . Although not as difficult of a matrix as soil, the methodology was able to show the effectiveness of a thermoelectrically cooled SPME device to reliably quantitate VOCs from a complex matrix.…”

Layer‐by‐layer self‐assembly of a novel covalent organic frameworks microextraction coating for analyzing polycyclic aromatic hydrocarbons from aqueous solutions via gas chromatography

“…Usually, these commercially available fibers were assembled using a polymer thin‐film coating on a finely fused silica fiber, which exhibits some drawbacks such as relatively expensive, low recommended operation temperature, instability in organic solvents, easy exfoliation of the coating, short lifetime, and difficulty to prepare in the laboratory. To overcome these limitations, many researchers have made great efforts to prepare metal‐based SPME fibers, such as stainless‐steel wire (SSW) , copper wire , platinum wire , aluminum wire , titanium wire , and silver wire . Myriad coatings for the SPME fiber have also been introduced, including carbon nanotubes , metal oxide , graphene/graphene oxide , poly(ionic liquids) , metal‐organic frameworks , and covalent organic frameworks (COFs) .…”

Multiresidue Determination of Six Pesticide Adjuvants in Characteristic Minor Crops Using QuEChERS Method and Gas Chromatography‐Mass Spectrometry

“…Sample pretreatment techniques that could concentrate trace analytes and prevent interferences is a key step in analytical procedure. Recently, several methods have been explored for the determination of the six target pesticide adjuvants, such as liquid‐liquid extraction (LLE),‐ headspace extraction (HS),, solid‐phase microextraction (SPME),,, and purge and trap (PT) ,. However, the traditional LLE using large volumes of toxic organic solvents is tedious, time consuming, and environmentally unfriendly.…”