Journal
MICROCHEMICAL JOURNAL
Volume 159, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.microc.2020.105350
Keywords
Pyrethroid pesticides; Fe3O4 magnetic nanoparticles; Urine; In situ ionic liquid; Dispersive liquid-liquid microextraction
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Funding
- Hainan Provincial Department of Education [Hnky2018-13]
- Research project of education and teaching reform of Hainan University, China [hdjy1960]
- National Natural Science Foundation of China, China [21505029]
- 111 Project, China [D20010]
- Kobayashi International Scholarship Foundation, Japan
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Dispersive liquid-liquid microextraction (DLLME) based on Fe3O4 magnetic nanoparticle-assisted in situ ionic liquid was developed as a novel method for the pretreatment of pyrethroid pesticides (flumethrin, bifenthrin and silafluofen) in urine samples. [N-4,N-4,N-4,N-4]Cl and Na[N(CN)(2)] formed a ionic liquid ([N-4,N-4,N-4,N-4][N(CN)(2)]), which provides an alternative to highly toxic solvents; moreover, high extraction recoveries and enrichment factors were achieved. The extraction parameters affecting the extraction recoveries were investigated. Under optimum conditions, the analytical method showed a good linear response, with correlation coefficient (R-2) values ranging from 0.9994 to 0.9996. The enrichment factor, limit of detection and recovery were 108-125, 2.7-5.0 mu g L-1 and 88.0-101.1%, respectively. Therefore, this green and simple method is suitable for the microextraction of pyrethroid pesticides in urine samples. It is valuable to establish a sensitive method for monitoring trace levels of pyrethroids, which could contribute to the use of rapid and green sample preparation procedures in urine samples.
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