Determination of four heterocyclic insecticides by ionic liquid dispersive liquid–liquid microextraction in water samples

Liu, Yu; Zhao, Ercheng; Zhu, Wentao; Gao, Haixiang; Zhou, Zhiqiang

doi:10.1016/j.chroma.2008.11.076

Cited by 299 publications

(157 citation statements)

References 42 publications

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“…Therefore, acetonitrile was not a suitable solvent for the extraction of analytes. In the determination of four heterocyclic insecticides in water samples using IL-DLLME, Liu et al 25 observed the same behavior. As it can be seen, methanol exhibits better recoveries for all compounds, thus it was selected as the disperser solvent.…”

Section: Selection Of Extraction and Disperser Solventmentioning

confidence: 52%

“…25 When salt is added to the solution, the water molecules form a hydration sphere around the ionic salt molecule. The hydration spheres reduce the amount of water available to dissolve the analytes favoring analyte extraction into the organic phase.…”

Section: Effect Of Addition Of Saltmentioning

confidence: 99%

“…46 However, the addition of salt may have different effects when ionic liquids are used as extraction solvents. 25 Generally, most studies use NaCl to investigate the influence of ionic strength on IL-DLLME. In this experiment, tests were carried without the addition of salt, with 1% (m/v) magnesium sulfate (MgSO 4 ) and 1% (m/v) ammonium sulfate ((NH 4 ) 2 SO 4 ) to evaluate the effect of different salts on the recoveries of analytes.…”

Section: Effect Of Addition Of Saltmentioning

confidence: 99%

“…However, when using the volume of 500 µL of methanol, all compounds showed a significantly greater area (p < 0.05), therefore, the volume of 500 µL of methanol was chosen. Studying pesticide extraction in water using IL-DLLME, Liu et al 25 also used a methanol volume of 500 µL. …”

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confidence: 99%

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Multi-Residue Method for Determination of Thirty-Five Pesticides, Pharmaceuticals and Personal Care Products in Water Using Ionic Liquid-Dispersive Liquid-Liquid Microextraction Combined with Liquid Chromatography-Tandem Mass Spectrometry

Marube¹,

Caldas²,

Santos³

et al. 2017

J. Braz. Chem. Soc.

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Ionic liquid-dispersive liquid-liquid microextraction (IL-DLLME) was used for the determination of different chemical classes of analytes for the first time. Limits of quantification (LOQs) ranged from 0.5 to 2.5 µg L −1, and the linearity ranged from the LOQ of each compound to 50 µg L -1. Recoveries ranged from 70 to 120% for the compounds, with relative standard deviations less than 18%. The proposed method demonstrates for the first time that sample preparation by IL-DLLME and determination by liquid chromatography-tandem mass spectrometry (LC-MS/MS) can be used successfully for the simultaneous extraction of 19 kinds of pesticides and 16 PPCPs from water samples. In addition, to eliminate the environmental risk of waste solvent disposal, this technique uses a low-toxicity extraction solvent. Finally, the analytical method proposed was applied successfully in analysis in surface water samples. Keywords: IL-DLLME, water, pesticides, PPCPs, LC-MS/MS IntroductionIn recent decades, many synthetic organic compounds detected in water samples have attracted people's attention. Pesticides, pharmaceuticals and personal care products (PPCPs) 1 have also been detected and are investigation targets. 2 Pesticides play an important role in increasing agricultural productivity. Their use in agriculture is inevitable, still being the most effective tool in the fight against weeds and pests. They are not only used for agricultural purposes, but also in forest and environmental preservation areas. Although the use of pesticides in agricultural applications provides a wide range of beneficial effects, their extensive use has been a concern because of hazards to the environment. 1,3 Toxic effects on humans, such as acute neurological toxicity, impairment of neurological development, possible dysfunction of the immune, reproductive and endocrine systems, cancers, chronic kidney disease and other potential diseases have been reported in many papers. 4,5 PPCPs are used to prevent or treat human and animal diseases or to improve the quality of daily life. They have emerged as a major group of environmental pollutants over the past decades since some of them are produced and used in large quantities. 2 Various investigations indicate that many of them can hardly be totally removed during the water treatment process. Many PPCPs are persistent or pseudo-persistent in the environment and are toxic to non-target organisms. They also have the potential to bioaccumulate in different trophic level organisms. 2,6 To quantitatively evaluate the fate of these chemicals and ensure the quality of drinking water, effective analytical methods are extremely necessary. Since the concentrations of pesticides and PPCPs in water are generally very low (ng L -1 or less), extraction techniques are needed prior to chromatographic determination. 7 The most commonly used methods are liquid-liquid extraction (LLE), 8,9 and solid phase extraction (SPE).10,11 These techniques, however, are time consuming and use large amounts of organic solvents. Thus, the ...

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Section: Selection Of Extraction and Disperser Solventmentioning

confidence: 52%

Section: Effect Of Addition Of Saltmentioning

confidence: 99%

Section: Effect Of Addition Of Saltmentioning

confidence: 99%

mentioning

confidence: 99%

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Multi-Residue Method for Determination of Thirty-Five Pesticides, Pharmaceuticals and Personal Care Products in Water Using Ionic Liquid-Dispersive Liquid-Liquid Microextraction Combined with Liquid Chromatography-Tandem Mass Spectrometry

Marube¹,

Caldas²,

Santos³

et al. 2017

J. Braz. Chem. Soc.

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“…RTILs are melting salt systems composed of organic cations and organic or inorganic anions. 34 They are soluble in both organic and inorganic phases and compatible with the reverse-phase HPLC mobile phase. Moreover, they barely volatilize and are enviromentally friendly.…”

mentioning

confidence: 99%

Determination of pyrethroid pesticides in environmental samples using ionic liquid dispersive liquid-liquid microextraction

Wu¹,

Liu²,

Yang³

et al. 2012

J. Braz. Chem. Soc.

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Microextração líquido-líquido dispersiva (DLLME) utilizando líquido iônico (IL) como solvente extrator foi desenvolvida com uma nova abordagem para a determinação de quatro pesticidas piretróides em amostras ambientais de água e solo. Cromatografia líquida de alto rendimento com detector de UV (HPLC-UV) foi empregada na análise cromatográfica. Este método é rápido, fácil de operar e ambientalmente correto. O solvente clorado altamente tóxico foi substituído pelo IL hexafluorofosfato de 1-hexil-3-metilimidazólio ( [C 6 MIM][PF 6 ]), para o qual elevados valores de recuperação de extração e fatores de enriquecimento foram obtidos. Os efeitos do volume de IL, tipo e volume do solvente dispersor, adição de sal, pH e tempo de extração foram investigados e otimizados. Nas condições ideais, o método mostrou boa resposta linear com valores de coeficiente de correlação (R 2 ) no intervalo de 0,9943 a 0,9986. Desvio padrão relativo (RSD) variou de 3,9 a 10,1%. Fator de enriquecimento, limite de detecção e recuperação variaram de 260 a 319, de 0,94 a 1,97 μg L -1 e de 89 a 98%, respectivamente. Para amostras de água reais, RSD variou de 3,8 a 10,8%, e recuperação de 83 a 99%. Para análise de amostra de solo, RSD e recuperação variaram de 3,7 a 8,9% e 88 a 98%, respectivamente.Dispersive liquid-liquid microextraction (DLLME) using ionic liquid (IL) as extraction solvent was developed as a new approach for the determination of four pyrethroid pesticides in environmental water and soil samples. High-performance liquid chromatography with ultraviolet detection (HPLC-UV) was employed on chromatographic analysis. The method is rapid, easy to operate and enviromentally-friendly. The highly toxic chlorinated solvent was replaced by the IL 1-hexyl-3-methylimidazolium hexafluorophosphate ([C 6 MIM][PF 6 ]), in which high extraction recovery and enrichment factors were obtained. The effects of IL volume, type and volume of disperser solvent, salt addition, pH and extraction time were investigated and optimized. Under optimum conditions, the method showed good linear response with correlation coefficient (R 2 ) values in the range of 0.9943 to 0.9986. Relative standard deviation (RSD) varied from 3.9 to 10.1%. Enrichment factor, limit of detection and recovery ranged from 260 to 319, 0.94 to 1.97 μg L -1 and 89 to 98%, respectively. For real water samples, RSD ranged from 3.8 to 10.8%, and recovery from 83 to 99%. For soil sample analysis, RSD and recovery ranged from 3.7 to 8.9% and 88 to 98, respectively.Keywords: ionic liquid dispersive liquid-liquid microextraction, pyrethroid pesticides, HPLC-UV, environmental sample IntroductionPyrethroid pesticides are synthesized through biomimetic synthesis method based on the natural pyrethrin structure. They have been widely applied in controlling agricultural and sanitary pests 1 because of their excellent insecticidal activity, fast knockdown capability and relatively low mammalian toxicity, 2,3 and have been gradually taking the place of organophosphorus and carbamate pesticides. [4][5]...

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Use of Ionic Liquids in Microextraction Techniques

Aguilera-Herrador

2010

Encyclopedia of Analytical Chemistry

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The combined use of microextraction techniques for sample preparation and ionic liquids (ILs) is of growing interest in analytical chemistry. This article focuses on the combinations described in this context, considering the added values of ILs that are exploited in the extraction procedures. With this purpose, after an overview of the characteristics of ILs and their impact on analytical science, the topic is contextualized by giving a general outlook of a variety of microextraction techniques described. The main body of the article is devoted to the detailed explanation of the different uses of ILs in solid‐phase and liquid‐phase microextraction modalities, including the description of the most relevant practical examples presented in the literature. Finally, some remarks are made about the prospects of ILs in this context.

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Determination of four heterocyclic insecticides by ionic liquid dispersive liquid–liquid microextraction in water samples

Cited by 299 publications

References 42 publications

Multi-Residue Method for Determination of Thirty-Five Pesticides, Pharmaceuticals and Personal Care Products in Water Using Ionic Liquid-Dispersive Liquid-Liquid Microextraction Combined with Liquid Chromatography-Tandem Mass Spectrometry

Multi-Residue Method for Determination of Thirty-Five Pesticides, Pharmaceuticals and Personal Care Products in Water Using Ionic Liquid-Dispersive Liquid-Liquid Microextraction Combined with Liquid Chromatography-Tandem Mass Spectrometry

Determination of pyrethroid pesticides in environmental samples using ionic liquid dispersive liquid-liquid microextraction

Use of Ionic Liquids in Microextraction Techniques

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