scholarly journals Preparation of a magnetic multiwalled carbon nanotube@polydopamine/zeolitic imidazolate framework-8 composite for magnetic solid-phase extraction of triazole fungicides from environmental water samples

RSC Advances ◽  
2018 ◽  
Vol 8 (45) ◽  
pp. 25351-25360 ◽  
Author(s):  
Xiaodong Huang ◽  
Yanan Liu ◽  
Guangyang Liu ◽  
Lingyun Li ◽  
Xiaomin Xu ◽  
...  
Keyword(s):  
Water Samples ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Phase Extraction ◽  
Multiwalled Carbon ◽  
Zeolitic Imidazolate Framework ◽  
Triazole Fungicides ◽  
Magnetic Solid

A magnetic ZIF-8 composite was prepared based on Fe3O4/MWCNT@PDA and used as an adsorbent for MSPE of triazoles from environmental water samples.

scholarly journals Magnetic Solid-Phase Extraction of Dichlorodiphenyltrichloroethane and Its Metabolites from Environmental Water Samples Using Ionic Liquid Modified Magnetic Multiwalled Carbon Nanotube/Zeolitic Imidazolate Framework-8 as Sorbent

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2758 ◽  
Author(s):  
Huang ◽  
Liu ◽  
Liu ◽  
Liu ◽  
Xu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Water Samples ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Phase Extraction ◽  
Multiwalled Carbon ◽  
Zeolitic Imidazolate Framework ◽  
Magnetic Solid

As persistent organic pollutants, dichlorodiphenyltrichloroethanes (DDTs) and their metabolites pose considerable risks to human health and the environment. Therefore, monitoring DDTs in the environment is essential. Here, we developed a green, simple, and effective magnetic solid-phase extraction (MSPE) method coupled with gas chromatography tandem triple-quadrupole mass spectrometry to determine the DDT content of environmental water samples. A magnetic ionic liquid (IL) adsorbent was developed based on a modified magnetic multiwalled carbon nanotube/zeolitic imidazolate framework-8 (MM/ZIF-8/IL), synthesized by immobilizing the IL on the surface of MM/ZIF-8. We confirmed successful synthesis of MM/ZIF-8/IL by material characterization, and our results suggested that the MM/ZIF-8/IL had a high Brunauer–Emmett–Teller surface area (159.9 m2 g−1), good thermostability (<800 °C), and a high degree of superparamagnetism (52.9 emu g−1). Several experimental conditions affecting the MSPE efficiency were optimized. Under the best conditions, good detection linearity was achieved (0.5–500 µg L−1) with determination coefficients ranging from 0.9927 to 0.9971. The lower limits of detection (0.0016–0.0072 µg L−1) also had good precision, having an intraday relative standard deviation (RSD) ≤ 6.5% and an interday RSD ≤ 8.9%. Finally, we used the as-developed method to determine DDT levels in environmental water samples.

scholarly journals Magnetic Solid-Phase Extraction of Pyrethroid Pesticides from Environmental Water Samples Using Deep Eutectic Solvent-type Surfactant Modified Magnetic Zeolitic Imidazolate Framework-8

Molecules ◽  
2019 ◽  
Vol 24 (22) ◽  
pp. 4038 ◽  
Author(s):  
Huifang Liu ◽  
Lihua Jiang ◽  
Meng Lu ◽  
Guangyang Liu ◽  
Tengfei Li ◽  
...  
Keyword(s):  
Water Samples ◽  
Solid Phase ◽  
Deep Eutectic Solvent ◽  
Magnetic Solid Phase Extraction ◽  
Environmental Water ◽  
Environmental Water Samples ◽  
Phase Extraction ◽  
Zeolitic Imidazolate Framework ◽  
Pyrethroid Pesticides ◽  
Magnetic Solid

A simple, sensitive and effective magnetic solid-phase extraction (MSPE) technique was developed for the extraction of pyrethroid pesticides from environmental water samples, followed by gas chromatography tandem triple quadrupole mass spectrometry determination. An adsorbent of magnetic zeolitic imidazolate framework-8@deep eutectic solvent (M-ZIF-8@DES) was prepared using deep eutectic solvent coated on the surface of M-ZIF-8. The features of M-ZIF-8@DES were confirmed by material characterizations, and the results indicated that M-ZIF-8@DES has a good magnetism (61.3 emu g−1), a decent surface area (96.83 m2 g−1) and pore volume (0.292 mL g−1). Single factor experiments were carried out to investigate the effect of different conditions on the performance of MSPE. Under the optimal conditions, the developed method performs good linearity (R2 ≥ 0.9916) in the concentration range of 1–500 μg L−1. The limits of detection were in the range of 0.05–0.21 μg L−1 (signal/noise = 3/1). The intraday relative standard deviation (RSD) and interday RSD were less than 9.40%. Finally, the proposed technique was applied for the determination of pyrethroid pesticides in environmental water samples. This work shows the potential of DES-modified metal-organic frameworks for different sample pretreatment techniques.

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.

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