Multi-residue determination of pesticides in water using multi-walled carbon nanotubes solid-phase extraction and gas chromatography–mass spectrometry

Carbon‐based sorbents in chromatography. New achievements

“…Similar results were achieved using SPE extraction dual-layer carbon/PSA adsorbent (Shimelis et al, 2007). SPE employing MWCNTs was successfully applied for the preconcentration of pesticides from water prior GC-MS analysis (Wang et al, 2007b) and for the extraction of fungicides and promethryin from water (Zhou et al, 2007).…”

Determination of 16 polycyclic aromatic hydrocarbons in environmental water samples by solid-phase extraction using multi-walled carbon nanotubes as adsorbent coupled with gas chromatography–mass spectrometry

“…The multi-walled CNTs (MWCNTs) composed of several rolled-up graphite sheets [26] displayed large specific surface areas [27] and high adsorption capacity [28], which was primarily owe to their dramatically hydrophobic surface and unique structure with internal tube cavity [29]. Cai et al [30] indicated that the hexagonal arrays of carbon atoms in graphene sheets of the surface of CNTs have strong interaction with the two benzene rings of dioxin, and therefore, it was easily concluded that MWCNTs also have the ability to adsorb PAHs containing two or more fused benzene rings (2)(3)(4)(5)(6).…”

Occurrence and levels of pesticides in South Lebanon water

“…All these pesticides were observed at similar levels in studies conducted all over the world. [52][53][54][55][56][57] Finally, tolclofos-methyl, tetradifon, chlorfenapyr, and trifluralin were detected in all examined water samples in October. These compounds are not used in our region and highly adsorbed to soil particles indicating that their detection resulted from persistent contamination that was previously masked by dilution.…”