Rapid Multiplug Filtration Cleanup with Multiple-Walled Carbon Nanotubes and Gas Chromatography–Triple-Quadruple Mass Spectrometry Detection for 186 Pesticide Residues in Tomato and Tomato Products

Abstract

This study reports the development and validation of a novel rapid cleanup method based on multiple-walled carbon nanotubes in a packed column filtration procedure for analysis of pesticide residues followed by gas chromatography-triple-quadruple tandem mass spectrometry detection. The cleanup method was carried out by applying the streamlined procedure on a multiplug filtration cleanup column with syringes. The sorbent used for removing the interferences in the matrices is multiple-walled carbon nanotubes mixed with anhydrous magnesium sulfate. The proposed cleanup method is convenient and time-saving as it does not require any solvent evaporation, vortex, or centrifugation procedures. It was validated on 186 pesticides and 3 tomato product matrices spiked at two concentration levels of 10 and 100 μg kg(-1). Satisfactory recoveries and relative standard deviations are shown for most pesticides using the multiplug filtration cleanup method in tomato product samples. The developed method was successfully applied to the determination of pesticide residues in market samples.

Distribution behaviour of acaricide cyflumetofen in tomato during home canning

“…is one of the most widely grown vegetable plants all over the world. It is consumed daily in various ways, for instance, raw or cooked; as tomato juice or tomato paste (Zhao et al 2014). Tomato is susceptible to acarid damage in the growing period.…”

Comparison of pulse glow discharge‐ion mobility spectrometry and liquid chromatography with tandem mass spectrometry based on multiplug filtration cleanup for the analysis of tricaine mesylate residues in fish and water

“…PSA is a weak anion exchanger that can remove various organic acids, fatty acids, and some sugars, and C 18 can absorb weak polarity substances like lipids . MWCNTs have been applied as effective clean‐up sorbents for removing fatty acids, pigments, and other matrix compounds in pesticide multiresidue analysis in our previous work . To obtain the best cleanup performance, different amounts of PSA, C 18 and MWCNTs were investigated in the m‐PFC procedure (combination A: 50 mg of PSA and 150 mg of MgSO 4 ; combination B: 100 mg of PSA and 150 mg of MgSO 4 ; combination C: 50 mg of PSA, 30 mg of C 18 , and 150 mg of MgSO 4 ; combination D: 30 mg of PSA, 30 mg of C 18 , 5 mg of MWCNTs, and 150 mg of MgSO 4 ).…”

“…All solutions were stored at 4ЊC before use. PSA, C 18 and multiwalled carbon nanotubes (MWCNTs) with average external diameters of 5ß 10 nm were obtained from Tianjin Bonna-Agela Technologies (China). MWCNTs were dried for 2 h at 120ЊC to remove the absorbed water and then kept in desiccators for storage.…”

“…PSA is a weak anion exchanger that can remove various organic acids, fatty acids, and some sugars, and C 18 can absorb weak polarity substances like lipids [21,22]. MWCNTs have been applied as effective clean-up sorbents for removing fatty acids, pigments, and other matrix compounds in pesticide multiresidue analysis in our previous work [18][19][20]. To obtain the best cleanup performance, different amounts of PSA, C 18 As shown in Fig.…”

Determination and Dissipation of Fipronil and Its Metabolites in Peanut and Soil

“…The GABA receptor is a 29 ligand-gated chloride channel, and the insecticide inhibits the chloride ion fluxing into 30 nerve cells, which results in nervous system hyper-excitation. Fipronil is a highly 31 effective broad-spectrum insecticide against sucking and chewing pests and is widely 32 used to control many species of soil and foliar insects on various crops. 4 It is also an 33 alternate insecticide for possible control of insects that are resistant to pyrethroid, 34 organophosphate, and carbamate pesticides.…”