Ultrasonic nebulization extraction coupled with headspace hollow fiber microextraction of pesticides from root of <i>Panax ginseng</i> C.A. Mey.

Li, Xueyuan; Wang, Lu; Wang, Ziming; Zhang, Huihui; Su, Rui; Xu, Xu; Zhang, Hanqi

doi:10.1002/jssc.201000858

Cited by 6 publications

(5 citation statements)

References 24 publications

(22 reference statements)

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“…Proper salt concentration can improve the viscosities of sample solutions and accelerate the mass transfer rate. ,,, In this study, the effect of NaCl concentration in the range of 0–20% on the response signals of analytes was investigated. It can be seen from Figure S4 that the peak areas of all analytes increased with the increase of NaCl concentration until the concentration reached 15%.…”

Section: Resultsmentioning

confidence: 99%

“…It can be seen from Figure S4 that the peak areas of all analytes increased with the increase of NaCl concentration until the concentration reached 15%. However, our previous study indicated that more salt in aerosol particles could cause a change of the physical properties of the fiber wall, which might result in a decrease of the diffusion rates of the analytes . Finally, a 15% NaCl aqueous solution was chosen in the following experiments.…”

Section: Resultsmentioning

confidence: 99%

“…However, our previous study indicated that more salt in aerosol particles could cause a change of the physical properties of the fiber wall, which might result in a decrease of the diffusion rates of the analytes. 23 Finally, a 15% NaCl aqueous solution was chosen in the following experiments.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Due to its simple operation and high elimination efficiency of matrix interference effects, HF-LPME has been applied to pharmaceutical analysis, such as determination of levonorgestrel and megestrol acetate drugs in human urine and analysis of antidepressants in human fluids . Moreover, HF-LPME is easily coupled with other sample preparation apparatus, such as headspace vial, online automated extraction system, and ultrasonic nebulization system, which greatly improves its practicality and flexibility.…”

Section: Introductionmentioning

confidence: 99%

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Headspace Microextraction of Sulfonamides from Honey by Hollow Fibers Coupled with Ultrasonic Nebulization

Liu

et al. 2016

J. Agric. Food Chem.

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A new method for the rapid simultaneous determination of five sulfonamides in honey was developed using ultrasonic nebulization-assisted extraction coupled with hollow fiber liquid-liquid-liquid microextraction prior to liquid chromatography. In the present method, the sample solution was nebulized by ultrasonication. Sulfonamides in the aerosol particles were extracted by 1-octanol impregnated in the pores of a hollow fiber and further into the acceptor phase (acid solution, pH 2.0) contained in the lumen of the hollow fiber. Several experimental parameters that affect the extraction efficiency were optimized. The present method provides good recoveries (88.9-114.2%) and acceptable precision (<10.7%), indicating the effective extraction. The detection limits were 4.6-6.8 μg/kg, lower than the maximum residue limits of sulfonamides in honeys. Compared to the traditional extraction methods, the present method requires less organic solvent and operation time, demonstrating excellent cleanup ability and good enrichment efficiency.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Headspace Microextraction of Sulfonamides from Honey by Hollow Fibers Coupled with Ultrasonic Nebulization

Liu

et al. 2016

J. Agric. Food Chem.

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“…After extraction, the fiber was desorbed in a polar solvent. Li et al [49] described an ultrasonic nebulization extraction coupled to headspace HFME for extraction of pesticides from a plant root sample. A suspension of powdered sample in NaCl solution was nebulized by ultrasound.…”

Section: Applications Of Hfme For Extraction Of Pesticidesmentioning

confidence: 99%

Applications of Hollow-Fiber and Related Microextraction Techniques for the Determination of Pesticides in Environmental and Food Samples—A Mini Review

Prosen

2019

Separations

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Pesticides represent one of the most important groups of analytes in environmental analysis. Moreover, their levels are very frequently determined in food and beverages due to the concern over their possible adverse health effects. Their concentration in samples is usually very low; thus, they have to be preconcentrated. Conventional solvent and solid-phase extractions are mainly used for this purpose, but miniaturized approaches are also being applied more and more often. The present review covers solvent microextractions that use a semi-permeable membrane barrier between the sample and the solvent. The main representatives of this approach are hollow-fiber microextraction (HFME), solvent bar microextraction (SBME), electromembrane extraction (EME), and different variations of those, such as combinations with other sorbent or solvent microextractions, electromigration, etc. The relevant research from the last decade, dealing with the application of these microextractions to the isolation of pesticides from various environmental and food samples, is critically discussed with emphasis on their strengths and weak points.

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Multiresidue method for the fast determination of pesticides in nutraceutical products (Camellia sinensis) by GC coupled to triple quadrupole MS

Martínez-Domínguez

Plaza‐Bolaños

Romero‐González

et al. 2014

J of Separation Science

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A method based on QuEChERS (quick, easy, cheap, effective, rugged, and safe) has been developed and validated for the determination and quantification of more than 140 pesticides in nutraceutical products obtained from green tea (Camellia sinensis). Extraction was performed with acidified acetonitrile (acetic acid 1%, v/v) and a clean-up step using primary secondary amine (50 mg), graphitized black carbon (100 mg) and magnesium sulfate (200 mg) was needed. Pesticide determination was achieved utilizing GC coupled to triple quadrupole MS/MS using the selective-reaction monitoring mode. The total run time was 23 min. Pesticides were quantified using matrix-matched calibration. Recoveries ranged from 70 to 120% and relative SD was lower than 25% at 10, 50, and 100 μg/kg. LOQs were lower than 10 μg/kg. 148 pesticides were validated. The validated method was applied to commercial nutraceutical products, detecting 4,4-dichlorobenzophenone (28 μg/kg), o,p'-dicofol (38 μg/kg) and p,p-dicofol (44 μg/kg) in a few samples.

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Ultrasonic nebulization extraction coupled with headspace hollow fiber microextraction of pesticides from root of Panax ginseng C.A. Mey.

Cited by 6 publications

References 24 publications

Headspace Microextraction of Sulfonamides from Honey by Hollow Fibers Coupled with Ultrasonic Nebulization

Headspace Microextraction of Sulfonamides from Honey by Hollow Fibers Coupled with Ultrasonic Nebulization

Applications of Hollow-Fiber and Related Microextraction Techniques for the Determination of Pesticides in Environmental and Food Samples—A Mini Review

Multiresidue method for the fast determination of pesticides in nutraceutical products (Camellia sinensis) by GC coupled to triple quadrupole MS

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