Simultaneous extraction of permethrin diastereomers and deltamethrin in environmental water samples based on aperture regulated magnetic mesoporous silica

2020 ◽  
Vol 44 (37) ◽  
pp. 16152-16162
Author(s):  
Meixing Zhang ◽  
Jie Mei ◽  
Siying Lv ◽  
Jiahao Lai ◽  
Xiaoni Zheng ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Solid Phase Extraction ◽  
Water Samples ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Environmental Water ◽  
Phase Extraction ◽  
Simultaneous Extraction ◽  
Magnetic Solid ◽  
Magnetic Mesoporous Silica

The aperture of KIT-6 can influence the recoveries of magnetic solid phase extraction.

scholarly journals Multi-Walled Carbon Nanotubes for Magnetic Solid-Phase Extraction of Six Heterocyclic Pesticides in Environmental Water Samples Followed by HPLC-DAD Determination

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5729
Author(s):  
Jiping Ma ◽  
Liwei Hou ◽  
Gege Wu ◽  
Liyan Wang ◽  
Xiaoyan Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Solid Phase Extraction ◽  
Water Samples ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Environmental Water ◽  
Phase Extraction ◽  
Multi Walled Carbon Nanotubes ◽  
Magnetic Solid ◽  
Walled Carbon Nanotubes

Magnetic multi-walled carbon nanotubes were prepared as magnetic solid-phase extraction (MSPE) adsorbent for the enrichment of six heterocyclic pesticides in environmental water samples, including imidacloprid, triadimefon, fipronil, flusilazole, chlorfenapyr and fenpyroximate. Then six heterocyclic pesticides were separated and determined by high-performance liquid chromatography-diode-array detector (HPLC-DAD). Major factors influencing MSPE efficiency, including the dose of mag-multi-walled carbon nanotubes (mag-MWCNTs), extraction time, solution pH, salt concentration, type and volume of eluent and desorption time were investigated. Under the optimized conditions, the enrichment factor of the method reached to 250. The linearity was achieved within 0.05–10.0 μg/L for imidacloprid and chlorfenapyr, 0.10–10.0 μg/L for fipronil, flusilazole, triadimefon and fenpyroximate. Limits of detection were in the range of 0.01–0.03 μg/L. Good precision at three spiked levels were 1.1–11.2% (intra-day) and 1.7–11.0% (inter-day) with relative standard deviation of peak area, respectively. The developed method was utilized to analyze tap water, river water and reservoir water samples and recoveries at three spiked concentration levels ranged from 72.2% to 107.5%. The method was proved to be a convenient, rapid and practical method for sensitive determination of heterocyclic pesticides.

Preparation of magnetic zeolitic imidazolate framework-67 composites for the extraction of phthalate esters from environmental water samples

2020 ◽  
Vol 12 (40) ◽  
pp. 4906-4912
Author(s):  
Qingsong Zhang ◽  
Guangyang Liu ◽  
Xiaolin Cao ◽  
Jungang Yin ◽  
Ziping Zhang
Keyword(s):  
Solid Phase Extraction ◽  
Water Samples ◽  
Solid Phase ◽  
Phthalate Esters ◽  
Magnetic Solid Phase Extraction ◽  
Environmental Water ◽  
Phase Extraction ◽  
Zeolitic Imidazolate Framework ◽  
Magnetic Solid

In this paper, magnetic ZIF-67 composites were prepared by an in situ method and utilized in the magnetic solid-phase extraction of phthalate esters.

scholarly journals Magnetic Solid Phase Extraction using Magnetic Mesoporous Silica for Preconcentration of Organophosphorus Pesticides

2019 ◽  
Vol 8 (4) ◽  
pp. 6847-6852
Keyword(s):  
Mesoporous Silica ◽  
Solid Phase Extraction ◽  
Water Samples ◽  
High Performance ◽  
Solid Phase ◽  
Organophosphorus Pesticides ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Magnetic Solid ◽  
Mcm 41

The present study describes the synthesis, characterization and application of two mesoporous silica material based coated magnetic nanoparticles namely Fe3O4 -SBA-15 and Fe3O4 -MCM-41 for the simultaneous preconcentration of three selected organophosphorus pesticides (OPPs) namely chlorpyrifos, diazinon and parathion methyl from water samples. The resultant sorbent material was physicochemically and morphologically characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and N2 adsorption analysis. OPPs pesticides extraction efficiency of two sorbents were evaluated through magnetic solid phase extraction (MSPE) using high performance liquid chromatography with ultraviolet detector (HPLC/UV). The main parameters affecting the sorbent efficiency namely extraction time and desorption solvent were optimized. Comparatively, Fe3O4 -SBA-15 achieved excellent percent recovery (97.5%) compared to the Fe3O4 -MCM-41 (87.1%) under optimum condition respectively. The result appealed that the Fe3O4 -SBA-15 composite was efficient sorbent with good capability for the preconcentration of selected OPPs from water samples.AThe present study describes the synthesis, characterization and application of two mesoporous silica material based coated magnetic nanoparticles namely Fe3O4 -SBA-15 and Fe3O4 -MCM-41 for the simultaneous preconcentration of three selected organophosphorus pesticides (OPPs) namely chlorpyrifos, diazinon and parathion methyl from water samples. The resultant sorbent material was physicochemically and morphologically characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and N2 adsorption analysis. OPPs pesticides extraction efficiency of two sorbents were evaluated through magnetic solid phase extraction (MSPE) using high performance liquid chromatography with ultraviolet detector (HPLC/UV). The main parameters affecting the sorbent efficiency namely extraction time and desorption solvent were optimized. Comparatively, Fe3O4 -SBA-15 achieved excellent percent recovery (97.5%) compared to the Fe3O4 -MCM-41 (87.1%) under optimum condition respectively. The result appealed that the Fe3O4 -SBA-15 composite was efficient sorbent with good capability for the preconcentration of selected OPPs from water samples.

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