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HERO ID
3479554
Reference Type
Journal Article
Title
In-syringe dispersive liquid-liquid microextraction based on the solidification of ionic liquids for the determination of benzoylurea insecticides in water and tea beverage samples
Author(s)
Wang, H; Hu, L; Li, W; Yang, X; Lu, R; Zhang, S; Zhou, W; Gao, H; Li, J
Year
2017
Is Peer Reviewed?
1
Journal
Talanta
ISSN:
0039-9140
EISSN:
1873-3573
Volume
162
Page Numbers
625-633
Language
English
PMID
27837881
DOI
10.1016/j.talanta.2016.10.035
Web of Science Id
WOS:000389088700084
Abstract
A novel in-syringe dispersive liquid-liquid microextraction based on the solidification of ionic liquids (in-syringe SIL-DLLME) was coupled with high-performance liquid chromatography-ultraviolet detector (HPLC-UVD) to detect five benzoylurea insecticides (BUs) in water and tea beverage samples. In this method, the hydrophobic ionic liquid [N8881][PF6] was formed in situ by the metathesis reaction between [N8881]Cl and the anion-exchange reagent KPF6 to extract the target analytes. The whole extraction procedure was performed in a syringe. The solidified extractant could be separated from the aqueous phase by exposing the emulsified extraction solution to an ice bath and then easily collected by squeezing out the aqueous phase through the prepared NWPP-based needle. Various parameters affecting the extraction efficiency, such as the amount of [N8881]Cl, the molar ratio of [N8881]Cl to KPF6, salt addition, cooling time, solution temperature, sample pH and sample volume, were evaluated. Under the optimized conditions, the proposed method was validated with satisfactory results: good linearities with coefficients of determination greater than 0.99 were obtained in the range of 2-500µgL(-1); the limits of detection varied between 0.29 and 0.59µgL(-1); the recoveries of the five benzoylurea insecticides ranged from 85.93% to 90.52%; and the intra-day (n=3) and inter-day (n=3) relative standard deviations were less than 5.36%. Finally, the proposed method was successfully used for the determination of BUs in real water and tea beverage samples.
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Phthalates – Targeted Search for Epidemiological Studies
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