Analysis of pesticides in seawater after enrichment onto C8 bonded-phase cartridges

Hinckley, Daniel A.; Bidleman, Terry F.

doi:10.1021/es00066a011

Cited by 86 publications

(45 citation statements)

References 20 publications

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“…In the traditional C 8 or C 18 SPE method, SPE columns consist of about 0.4-0.9 g of sorbents [24][25][26][27][28][29], while in our study, only 0.1 g of the Fe 3 O 4 @C 18 @Ba 2+ -ALG sorbents is enough for PAHs and PAEs to attain satisfactory results (Fig. 5).…”

Section: Effect Of the Amount Of Nanoparticle Sorbentsmentioning

confidence: 51%

“…Other researchers have also found similar negative effects of humic acid when C 8 or C 18 silica sorbents are used to extract PAHs and other organic compounds [24][25][26][27][28]. In surface water samples, the concentration of humic acid generally ranges from 1 to 5 mg L −1 [25,29]. In this range, the recoveries of target compounds meet the requirement of analysis.…”

Section: Effect Of Humic Acidmentioning

confidence: 72%

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Barium alginate caged Fe3O4@C18 magnetic nanoparticles for the pre-concentration of polycyclic aromatic hydrocarbons and phthalate esters from environmental water samples

Zhang

Niu

Cai

et al. 2010

Analytica Chimica Acta

145

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a b s t r a c tThe hydrophobic octadecyl (C 18 ) functionalized Fe 3 O 4 magnetic nanoparticles (Fe 3 O 4 @C 18 ) were caged into hydrophilic barium alginate (Ba 2+ -ALG) polymers to obtain a novel type of solid-phase extraction (SPE) sorbents, and the sorbents were applied to the pre-concentration of polycyclic aromatic hydrocarbons (PAHs) and phthalate esters (PAEs) pollutants from environmental water samples. The hydrophilicity of the Ba 2+ -ALG cage enhances the dispersibility of sorbents in water samples, and the superparamagnetism of the Fe 3 O 4 core facilitates magnetic separation. With the magnetic SPE technique based on the Fe 3 O 4 @C 18 @Ba 2+ -ALG sorbents, it requires only 30 min to extract trace levels of analytes from 500 mL water samples. After the eluate is condensed to 0.5 mL, concentration factors for both phenanthrene and di-n-propyl-phthalate are over 500, while for other analytes are about 1000. The recoveries of target compounds are independent of salinity and solution pH under testing conditions. Under optimized conditions, the detection limits for phenanthrene, pyrene, benzo [a]anthracene, and benzo[a]pyrene are 5, 5, 3, and 2 ng L −1 , and for di-n-propyl-phthalate, di-n-butyl-phthalate, di-cyclohexyl-phthalate, and din-octyl-phthalate are 36, 59, 19, and 36 ng L −1 , respectively. The spiked recoveries of several real water samples for PAHs and PAEs are in the range of 72-108% with relative standard deviations varying from 1% to 9%, showing good accuracy of the method. The advantages of the new SPE method include high extraction efficiency, short analysis time and convenient extraction procedure. To the best of our knowledge, it is unprecedented that hydrophilic Ba 2+ -ALG polymer caged Fe 3 O 4 @C 18 magnetic nanomaterial is used to extract organic pollutants from large volumes of water samples.

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Section: Effect Of the Amount Of Nanoparticle Sorbentsmentioning

confidence: 51%

Section: Effect Of Humic Acidmentioning

confidence: 72%

Barium alginate caged Fe3O4@C18 magnetic nanoparticles for the pre-concentration of polycyclic aromatic hydrocarbons and phthalate esters from environmental water samples

Zhang

Niu

Cai

et al. 2010

Analytica Chimica Acta

145

View full text Add to dashboard Cite

show abstract

“…This result indicates that it is the carbon layer that responsible for the effective adsorption of PAHs on the magnetic Fe 3 O 4 /C sorbents. The required dosage of Fe 3 O 4 /C sorbents is not only far less than some traditional SPE sorbents, such as graphitized carbon blacks, C 8 or C 18 bonded silica [22,[33][34][35][36], but also less than previous reported nanomaterial SPE sorbents [1][2][3]5,[7][8][9][10][11]15], which may result from the large surface areas of Fe 3 O 4 /C sorbents and strong adsorption ability of carbon materials. In the following experiment, 50 mg Fe 3 O 4 /C nanoparticle sorbents are applied to assure complete adsorption of analytes.…”

Section: Effect Of Amount Of Nanoparticle Sorbentsmentioning

confidence: 88%

Preparation of carbon coated Fe3O4 nanoparticles and their application for solid-phase extraction of polycyclic aromatic hydrocarbons from environmental water samples

Zhang

Niu

et al. 2010

Journal of Chromatography A

211

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a b s t r a c tThe carbon coated Fe 3 O 4 nanoparticles (Fe 3 O 4 /C) were synthesized by a simple hydrothermal reaction and applied as solid-phase extraction (SPE) sorbents to extract trace polycyclic aromatic hydrocarbons (PAHs) from environmental water samples. The Fe 3 O 4 /C sorbents possess high adsorption capacity and extraction efficiency due to strong adsorption ability of carbon materials and large surface area of nanoparticles, and only 50 mg of sorbents are required to extract PAHs from 1000 mL water samples. The adsorption attains equilibrium rapidly and analytes are eluted with acetonitrile readily. Salinity and solution pH have no obvious effect on the recoveries of PAHs, which avoids fussy adjustment to water sample before extraction. Under optimized conditions, the detection limits of PAHs are in the range of 0.2-0.6 ng L −1 . The accuracy of the method was evaluated by the recoveries of spiked samples. Good recoveries (76-110%) with low relative standard deviations from 0.8% to 9.7% are achieved. This new SPE method provides several advantages, such as high extraction efficiency, high breakthrough volumes, convenient extraction procedure, and short analysis times. To our knowledge, this is the first time that Fe 3 O 4 /C nanoparticles are used for the pretreatment of environmental water samples.

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“…Solid-phase extraction (SPE) has been extensively used to recover nonpolar organic chemicals from water (Hinkley and Bidleman, 1989;Loconto and Gaind, 1989;Swineford and Belisle, 1989). SPE technique provides high extraction efficiencies while reducing solvent usage and extraction time necessary for classical extraction methods such as liquid-solvent extractions.…”

Section: Introductionmentioning

confidence: 99%

Persistent organic pollutants in water and surface sediments of Taihu Lake, China and risk assessment

et al. 2003

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Analysis of pesticides in seawater after enrichment onto C8 bonded-phase cartridges

Cited by 86 publications

References 20 publications

Barium alginate caged Fe3O4@C18 magnetic nanoparticles for the pre-concentration of polycyclic aromatic hydrocarbons and phthalate esters from environmental water samples

Barium alginate caged Fe3O4@C18 magnetic nanoparticles for the pre-concentration of polycyclic aromatic hydrocarbons and phthalate esters from environmental water samples

Preparation of carbon coated Fe3O4 nanoparticles and their application for solid-phase extraction of polycyclic aromatic hydrocarbons from environmental water samples

Persistent organic pollutants in water and surface sediments of Taihu Lake, China and risk assessment

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