Magnetical hollow fiber bar collection of extract in homogenous ionic liquid microextraction of triazine herbicides in water samples

2017 ◽  
Vol 409 (10) ◽  
pp. 2569-2579 ◽  
Author(s):  
Kun Wang ◽  
Jia Jiang ◽  
Mingqin Kang ◽  
Dan Li ◽  
Shuang Zang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Hollow Fiber ◽  
Water Samples ◽  
Triazine Herbicides ◽  
Liquid Microextraction

Ionic Liquid-based Hollow Fiber Liquid–Liquid–Liquid Microextraction Combined with Capillary Electrophoresis for the Determination of Sulfonamides in Aquaculture Waters

2019 ◽  
Vol 57 (10) ◽  
pp. 950-960
Author(s):  
Youyi Wu ◽  
Jingwen Zhou ◽  
Xuedong Wang ◽  
Zhanen Zhang ◽  
Shiqian Gao
Keyword(s):  
Ionic Liquid ◽  
Capillary Electrophoresis ◽  
Hollow Fiber ◽  
Water Samples ◽  
Extraction Temperature ◽  
Relative Standard ◽  
Liquid Microextraction ◽  
Acceptor Phase ◽  
Donor Phase

Abstract Ionic liquid-based hollow-fiber liquid–liquid–liquid microextraction (IL-HF-LLLME) coupled to capillary electrophoresis (CE) has been developed for the determination of six sulfonamides (SAs) in aquaculture waters. A series of extraction parameters was optimized to enhance the extraction efficiency, which included type and pore size of hollow fiber, type and composition of extraction solvent, pH value of donor phase, the concentration of acceptor phase and the mass ratio of donor phase to acceptor phase along with extraction temperature and time. Under optimal conditions, the IL-HF-LLLME-CE method provided a wide liner range for six SAs from 2 to 1,000 μg L−1 (r2 ≥ 0.9995), the limits of the detection from 0.25 to 0.48 and the enrichment factors from 122 to 230, respectively. Relative standard deviations for intra- and interday precision were 1.4–5.3% and 1.8–7.5% (n = 5), respectively. The proposed method was successfully applied for the determination of trace-level SAs in seven real-world aquaculture water samples with good recoveries (80.4–100.7%). Also, sulfamerazine and sulfamethoxazole were detected at the level of 0.52–1.60 μg L−1 in two water samples. Due to its good sensitivity, simple operation, short analysis time and eco-friendliness, the developed method has a great application potential in analysis of trace SA residues in aquaculture waters.

Determination of Organochlorine Pesticides in Water Samples through Hollow Fiber Membrane-Liquid Phase Microextraction Using Ionic Liquid Material as Extractant

2013 ◽  
Vol 675 ◽  
pp. 260-263 ◽  
Author(s):  
Du Shu Huang ◽  
Ya Shun Chen ◽  
He Ping Yan ◽  
Na Wu ◽  
Wei Liu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Phase ◽  
Organochlorine Pesticides ◽  
Hollow Fiber ◽  
Water Samples ◽  
Hollow Fiber Membrane ◽  
Fiber Membrane ◽  
Liquid Phase Microextraction ◽  
Liquid Material

A novel method for determination of organochlorine pesticides residuals (2,4-DDT and 4,4-DDT) in water samples through hollow fiber membrane-liquid phase microextraction using ionic liquid material as extractant coupled with high performance liquid chromatography has been developed. The effect of extraction parameters including pH of the feed solution, stirring rate and extraction time was investigated. The proposed method provided enrichment efficiency of 323 and 289 for 2,4-DDT and 4,4-DDT respectively. The method had good linear range of 0.5-50 μg /L and the limits of detection of the pesticides were 0.1 μg /L.

Effervescence-assisted dispersive liquid–liquid microextraction based on the solidification of a floating ionic liquid with a special collection method for the rapid determination of benzoylurea insecticides in water samples

RSC Advances ◽  
2016 ◽  
Vol 6 (97) ◽  
pp. 95283-95291 ◽  
Author(s):  
Lu Hu ◽  
Heng Qian ◽  
Xiaoling Yang ◽  
Songqing Li ◽  
Sanbing Zhang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Water Samples ◽  
Rapid Determination ◽  
Collection Method ◽  
Special Collection ◽  
Benzoylurea Insecticides ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Dispersion liquid–liquid microextraction based on the solidification of a floating ionic liquid.

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