Solid-phase sample preparation and stability of pesticides in water using Empore disks

Barceló, Damià; Chirón, Serge; Lacorte, Sı́lvia; Martı́nez, Elena; Salau, J.S.; Hennion, Marie‐Claire

doi:10.1016/0165-9936(94)85006-2

Cited by 72 publications

(24 citation statements)

References 29 publications

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“…Organic pesticides including insecticides and herbicides are widely used in agriculture because of their powerful biological activity [1]. Organophophorus insecticides are the most widely used insecticides available today.…”

Section: Introductionmentioning

confidence: 99%

Comparison of C₁₈ silica and multi‐walled carbon nanotubes as the adsorbents for the solid‐phase extraction of Chlorpyrifos and Phosalone in water samples using HPLC

Hadjmohammadi

Peyrovi

Biparva

2010

J of Separation Science

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A comparison between C(18) silica and multi-walled carbon nanotubes (MWCNTs) in the extraction of Chlorpyrifos and Phosalone in environmental water samples was carried out using HPLC. Parameters affecting the extraction were type and volume of elution solvent, pH and flow rate of sample through the adsorbent. The optimum conditions obtained by C(18) cartridge for adsorption of these pesticides were 4 mL dichloromethane as elution solvent, sample pH of 5, flow rate of 1 mL/min, and those for MWCNT cartridge were 3 mL dichloromethane, pH of 5 and flow rate of 10 mL/min, respectively. Optimized mobile phase for separation and determination of these compounds by HPLC was methanol/water (80:20 v/v) with pH=5 (adjusted with phosphate buffer). Under optimal chromatographic and SPE conditions, LOD, linear range and precision (RSD n=8) were 3.03x10(-3), 0.01-5.00 microg/mL and 2.7% for Chlorpyrifos and 4.03x10(-4), 0.01-5.00 microg/mL and 2.3% for Phosalone, in C(18) cartridge, respectively. These values for MWCNT were 4.02x10(-6), 0.001-0.500 microg/mL and 1.8% for Chlorpyrifos and 1.02x10(-6), 0.001-0.500 microg/mL and 1.5% for Phosalone, respectively.

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Section: Introductionmentioning

confidence: 99%

Comparison of C₁₈ silica and multi‐walled carbon nanotubes as the adsorbents for the solid‐phase extraction of Chlorpyrifos and Phosalone in water samples using HPLC

Hadjmohammadi

Peyrovi

Biparva

2010

J of Separation Science

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“…Also immunosorbents have been utilised [31,32]. Most applications make use of cartridges or small precolumns, but also membrane discs, known as Empore discs, can be used as well [33,34]. The advantages of discs over SPE columns are higher sample throughput, shorter and more efficient removal of water and smaller volumes of the solvents needed for desorption.…”

Section: On-line Coupling Of Solid-phase Extraction With Gas Chromatomentioning

confidence: 98%

Solid-phase extraction or liquid chromatography coupled on-line with gas chromatography in the analysis of biological samples

Hyötyläinen

Riekkola

2005

Journal of Chromatography B

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“…Different solvents extract different plasticizers and contaminants from the SPE columns [8,19]. Using a more polar solvent, such as methanol, should leach a more polar contaminant than a less polar solvent, like ethyl acetate.…”

Section: Most Prominent Spe Contaminantsmentioning

confidence: 99%

“…Depending on the type of GC column used, degradation of the column can lead to benzoic acid, phenyl naphthalene, squalene, or the alkyl derivatives of benzene, styrene, naphthalene, and biphenyl showing up in chromatograms [5 -8]. Polysiloxanes, which arise from bleeding of the septum or the column's stationary phase, is a common problem for all the gas chromatograph users [8,9]. A general rule is that the thicker the column the less uniform it is and the more that bleed will become a factor [10].…”

Section: Introductionmentioning

confidence: 99%

Potential sources of background contaminants in solid phase extraction and microextraction

Stiles

Yang

Lippincott

et al. 2007

J of Separation Science

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A study to identify the sources of background contamination from SPE, using a C-18 sorbent, and solid-phase microextraction (SPME), using a 70 microm carbowax/divinylbenzene (CW/DVB) fiber, was carried out. To determine the source of contamination, each material used in the procedure was isolated and examined for their contribution. The solid-phase column components examined were: sorbent material and frits, column housings and each solvent used to elute analytes off the column. The components examined in the SPME procedure were: SPME fiber, SPME vials, water (HPLC grade), and salt (sodium chloride) used to increase the ionic strength. The majority of the background contaminants from SPE were found to be from the SPE sorbent material and frits. The class of contaminants extracted during a blank extraction were phthalates and other plasticizers used during the manufacturing process. All had blank levels corresponding to measured concentrations below 2 ng/ mL, except for undecane, which had a concentration of 5.4 ng/mL. The most prevalent contaminants in the SPME blank procedure are 1,9-nonanediol, a mixture of phthalates and highly bis-substituted phenols. All the concentrations were below 2 ng/mL, with the exception of bis (2-ethylhexyl) phthalate, which had concentrations ranging from 5 to 20 ng/mL.

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Solid-phase sample preparation and stability of pesticides in water using Empore disks

Cited by 72 publications

References 29 publications

Comparison of C₁₈ silica and multi‐walled carbon nanotubes as the adsorbents for the solid‐phase extraction of Chlorpyrifos and Phosalone in water samples using HPLC

Comparison of C₁₈ silica and multi‐walled carbon nanotubes as the adsorbents for the solid‐phase extraction of Chlorpyrifos and Phosalone in water samples using HPLC

Solid-phase extraction or liquid chromatography coupled on-line with gas chromatography in the analysis of biological samples

Potential sources of background contaminants in solid phase extraction and microextraction

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Solid-phase sample preparation and stability of pesticides in water using Empore disks

Cited by 72 publications

References 29 publications

Comparison of C18 silica and multi‐walled carbon nanotubes as the adsorbents for the solid‐phase extraction of Chlorpyrifos and Phosalone in water samples using HPLC

Comparison of C18 silica and multi‐walled carbon nanotubes as the adsorbents for the solid‐phase extraction of Chlorpyrifos and Phosalone in water samples using HPLC

Solid-phase extraction or liquid chromatography coupled on-line with gas chromatography in the analysis of biological samples

Potential sources of background contaminants in solid phase extraction and microextraction

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Product

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Comparison of C₁₈ silica and multi‐walled carbon nanotubes as the adsorbents for the solid‐phase extraction of Chlorpyrifos and Phosalone in water samples using HPLC

Comparison of C₁₈ silica and multi‐walled carbon nanotubes as the adsorbents for the solid‐phase extraction of Chlorpyrifos and Phosalone in water samples using HPLC