Development of counter current salting-out homogenous liquid–liquid extraction for isolation and preconcentration of some pesticides from aqueous samples

Farajzadeh, Mir Ali; Feriduni, Behruz; Mogaddam, Mohammad Reza Afshar

doi:10.1016/j.aca.2015.05.031

Cited by 50 publications

(18 citation statements)

References 28 publications

(24 reference statements)

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“…It can be that LODs and DLRs of the UA-HLLME method were better than or comparable with other reported methods except for SPE-DLLME-GC-MS. The EFs were higher than those reported by Refs [12,23] and comparable those reported by [24]. However, the EFs were lower than those reported by Refs [25][26][27][28].…”

Section: Comparison Of the Proposed Methods With The Other Sample Precontrasting

confidence: 45%

Ultrasound Assisted-Homogeneous Liquid-Liquid Phase Microextraction based on Deep Eutectic Solvents and Ethyl Acetate for Preconcentration of Selected Organochlorine Pesticides in Water Samples

Matong¹,

Mpupa²,

Nomngongo³

2018

Eurasian J Anal Chem

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A novel and greener methodology for the simultaneous preconcentration of organochlorine pesticides in water samples based on ultrasound assistedhomogeneous liquid-liquid phase microextraction (UA-HLLME) has been developed. Gas chromatography-time of flight mass spectrometry was used for quantification of OCPS in water samples. In this method, choline-chloride-ethylene glycol deep eutectic solvent and ethyl acetate were used as the disperser solvent and extraction solvent, respectively. Univariate and multivariate approaches were used for optimization of the influential parameters that affect the extraction efficiency of the UA-HLLME method. Under the optimum conditions, enrichment factors ranging from 152 to 403 with acceptable recoveries of 85-100% were obtained. The dynamic linear ranges were obtained in the concentration range 0.015-1000 μg L −1 with correlation coefficients ranging 0.9952-0.9995. The limits of detection and quantification of the developed UA-HLLME method were in the range 1.9-8.6 ng L −1 and 5.9-26 ng L −1 , respectively. The intra-day and inter-day precision expressed in terms of relative standard deviation (%RSD) ranged from 2.1-4.5% and 3.9-7.3%, respectively. The developed method was successfully applied for the preconcentration and determination of the selected OCPs from 3 different river water samples. The developed procedure displayed simplicity, environmental friendliness, relatively high extraction efficiency, short analysis time and relatively low detection limits.

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Section: Comparison Of the Proposed Methods With The Other Sample Precontrasting

confidence: 45%

Ultrasound Assisted-Homogeneous Liquid-Liquid Phase Microextraction based on Deep Eutectic Solvents and Ethyl Acetate for Preconcentration of Selected Organochlorine Pesticides in Water Samples

Matong¹,

Mpupa²,

Nomngongo³

2018

Eurasian J Anal Chem

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“…The chromatographic systems such as GC [28–34], LC [35, 36], MEKC [37], and CE [38–40] are used to determine the levels of pesticides in agricultural, food, and environmental samples. Analysis of low polarity and volatile pesticides is commonly done by GC.…”

Section: Introductionmentioning

confidence: 99%

Dispersive liquid‐liquid microextraction method combined with sugaring‐out homogeneous liquid‐liquid extraction for the determination of some pesticides in molasses samples

Yıldız

Çabuk

2021

J of Separation Science

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In this study, a sensitive analytical method was developed to determine some pesticides (cyprodinil, trifloxystrobin, prometryn, propachlor, fenitrothion, chlorpyrifos, profenofos, and phosalone) in molasses samples. Pesticides were extracted from samples by dispersive liquid‐liquid microextraction method combined with sugaring‐out homogeneous liquid‐liquid extraction and determined by gas chromatography–mass spectrometry analysis. In this method, pesticides in molasses samples were first extracted using a water‐miscible solvent (acetonitrile) in the sugaring‐out homogeneous liquid‐liquid extraction stage. The sugar in the ratio of 84–88% naturally contained in the molasses sample enabled phase separation in the acetonitrile‐water homogeneous mixture. Then acetonitrile phase containing pesticides was used as dispersing solvent in the second step of the process. Under the specified optimum conditions, the limit of detection was calculated between 0.8–6.1 ng/g and the limit of quantification was in the range of 2.5–20 ng/g. The relative standard deviation values of molasses samples containing 150 ng/g of each analyte were found to be lower than 4.9% intra‐day and 5.6% for inter‐day. This validated method has been successfully applied to different types of molasses.

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“…In our study, the recoveries and detection limits of the pesticides obtained when salt-ACN was used as the purification reagent were higher than those obtained when ACN alone. According to Farajzadeh et al [43], who described the NaCl-assisted ACN and 1,2-dibromoethane extraction and preconcentration of pesticides from aqueous samples, NaCl could preferentially facilitate the collection of the organic phase from aqueous solutions, and therefore it could promote extraction and enrich the analytes (Figure 3).…”

Section: Extraction Of Multi-classes Pesticides From Serummentioning

confidence: 99%

Salt‐assisted acetonitrile extraction and HPLC‐QTOF‐MS/MS detection for residues of multiple classes of pesticides in human serum samples

Yin

Fang

Zhang

et al. 2020

J of Separation Science

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Detecting pesticide residues in human serum is a challenging process. In this study we developed and validated a method for the extraction and recovery of residues of multiple classes of pesticides from serum using one reagent. Salt‐assisted acetonitrile extraction and high‐performance liquid chromatography with quadrupole time of flight tandem mass spectrometry were used to quantitate 34 pesticides classified in nine groups of chemicals in human serum samples, which are frequently detected in food. The recoveries for 33 of analyzed pesticides ranged from 86 to 112% with relative standard deviations below 15%. The limits of quantitation and linearity of 31 of the pesticides were 1 µg/L and >0.990, respectively. The lower limit of quantitation has been reported in the literature particularly for multi‐classes pesticide mixtures in human serum. The salt–acetonitrile reagent was allowed to achieve good recoveries and detection limits, which could be attributed to salt altering the solvent polarity, preferentially collecting the organic phase in the solution, and promoting the extraction. The developed method was applied for two organophosphate pesticide metabolites, diethylphosphate and 3,5,6‐trichloro‐2‐pyridinol, in serum from rats that were fed a nonlethal quantity of chlorpyrifos. The concentrations of these two were 252.18 ± 15.47 and 0.63 ± 0.23 µg/L, respectively.

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Development of counter current salting-out homogenous liquid–liquid extraction for isolation and preconcentration of some pesticides from aqueous samples

Cited by 50 publications

References 28 publications

Ultrasound Assisted-Homogeneous Liquid-Liquid Phase Microextraction based on Deep Eutectic Solvents and Ethyl Acetate for Preconcentration of Selected Organochlorine Pesticides in Water Samples

Ultrasound Assisted-Homogeneous Liquid-Liquid Phase Microextraction based on Deep Eutectic Solvents and Ethyl Acetate for Preconcentration of Selected Organochlorine Pesticides in Water Samples

Dispersive liquid‐liquid microextraction method combined with sugaring‐out homogeneous liquid‐liquid extraction for the determination of some pesticides in molasses samples

Salt‐assisted acetonitrile extraction and HPLC‐QTOF‐MS/MS detection for residues of multiple classes of pesticides in human serum samples

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