Determination of pesticides in seaweeds by pressurized liquid extraction and programmed temperature vaporization-based large volume injection–gas chromatography–tandem mass spectrometry

García-Rodríguez, D.; Carro-Díaz, A.M.; Lorenzo-Ferreira, R.A.; Cela, R.

doi:10.1016/j.chroma.2010.02.061

Cited by 45 publications

(22 citation statements)

References 48 publications

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“…Florisil combined with GCB gave very clean extracts when extracting pyrethroid and organophosphorus pesticides from seaweed using ACN with 1 % acetic acid under the general conditions tested [34]. To obtain pigment-free extracts, a suitable ratio between Florisil and GCB was required; this is consistent with the ratio of 0.25 previously reported for the determination of some pesticides by GC-MS/MS [14]. Thus, in this experiment GCB was tested with Florisil.…”

Section: Selection Of In-cell Clean-up Sorbentsmentioning

confidence: 86%

“…Pressure is a parameter without a significant effect on the extraction, in agreement with previous reports [13,14]. Taking into account these aspects and considering a safety issue with the equipment, a pressure of 1,500 psi was selected and used throughout the study [14,35].…”

Section: Selection Of Number Of Cyclesmentioning

confidence: 93%

“…Previous studies suggest that ACN with a low percentage of acetic acid [21,27,28] and MeOH [32] are generally the preferred solvents for avermectins. On the other hand, a mixture of hexane and ethyl acetate (4:1) has been shown to be useful for carbamates and organophosphorus compounds [14,29]. For benzoylureas, extraction was achieved with aqueous mixtures with MeOH [33].…”

Section: Solvent Optimization For Plementioning

confidence: 99%

“…GCB served as an adsorbent enabling in-cell clean-up during extraction of pesticides by PLE, and the resultant extracts were clean enough to be analysed using GC-MS [14,17]. Since the extraction cell should have sufficient adsorbent capability [17], four different adsorbents were investigated.…”

Section: Selection Of In-cell Clean-up Sorbentsmentioning

confidence: 99%

“…This together with the relevant matrix-effect problems (ion enhancement or ion suppression) makes the quantitative analysis of some compounds extremely difficult [12]. Pressurized liquid extraction (PLE) combined with in situ (in-cell) clean-up of the extracts can avoid the application of exhaustive post-clean-up procedures, such as column and/or gel-permeation chromatography, and may be automated [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

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Pesticides in seaweed: optimization of pressurized liquid extraction and in-cell clean-up and analysis by liquid chromatography–mass spectrometry

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Chemical residues, such as insecticides and anthelmintics, are frequently redistributed from the aquatic environment to marine species. This work reports on a fast validated protocol for the analysis of azamethiphos, three avermectins, two carbamates and two benzoylurea pesticides and chemotherapeutic agents in seaweeds based on pressurized liquid extraction and separation of analytes by liquid chromatography coupled with tandem mass spectrometry. The variables affecting the efficiency of pressurized liquid extraction, including temperature, number of extraction cycles, static extraction time and percent acetonitrile flush volume, were studied using a Doehlert design. The optimum parameters were 100 °C and one cycle of 3 min with 70 % acetonitrile. Adequate in-cell clean-up of the seaweeds was achieved using 0.8 g of Florisil over 0.1 g of graphitized carbon black on the bottom of the cell. The optimized method was validated using an analyte-free seaweed sample fortified at different concentrations. The limits of quantification ranged from 3.6 μg kg(-1) (azamethiphos) to 31.5 μg kg(-1) (abamectin). The recovery was from 87 to 120 % in most cases at different spiking levels. Finally, the reproducibility of the method expressed as the relative standard deviation and evaluated at concentrations of 10 and 50 μg kg(-1) was in the range 9-14.3 % and 6.1-12.3 %, respectively. The applicability of the method was evaluated with five commercial and 12 wild edible seaweeds, and four target compounds were detected in two wild seaweeds at a concentration below the quantification limit.

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Section: Selection Of In-cell Clean-up Sorbentsmentioning

confidence: 86%

Section: Selection Of Number Of Cyclesmentioning

confidence: 93%

Section: Solvent Optimization For Plementioning

confidence: 99%

Section: Selection Of In-cell Clean-up Sorbentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pesticides in seaweed: optimization of pressurized liquid extraction and in-cell clean-up and analysis by liquid chromatography–mass spectrometry

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Advanced Sample Preparation Techniques for MS Analysis

Picó

2015

Mass Spectrometry for the Analysis of Pesticide Residues and Their Metabolites

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Current literature in mass spectrometry

2010

J. Mass Spectrom.

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In order to keep subscribers up‐to‐date with the latest developments in their field, John Wiley & Sons are providing a current awareness service in each issue of the journal. The bibliography contains newly published material in the field of mass spectrometry. Each bibliography is divided into 11 sections: 1 Reviews; 2 Instrumental Techniques & Methods; 3 Gas Phase Ion Chemistry; 4 Biology/Biochemistry: Amino Acids, Peptides & Proteins; Carbohydrates; Lipids; Nucleic Acids; 5 Pharmacology/Toxicology; 6 Natural Products; 7 Analysis of Organic Compounds; 8 Analysis of Inorganics/Organometallics; 9 Surface Analysis; 10 Environmental Analysis; 11 Elemental Analysis. Within each section, articles are listed in alphabetical order with respect to author

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Determination of pesticides in seaweeds by pressurized liquid extraction and programmed temperature vaporization-based large volume injection–gas chromatography–tandem mass spectrometry

Cited by 45 publications

References 48 publications

Pesticides in seaweed: optimization of pressurized liquid extraction and in-cell clean-up and analysis by liquid chromatography–mass spectrometry

Pesticides in seaweed: optimization of pressurized liquid extraction and in-cell clean-up and analysis by liquid chromatography–mass spectrometry

Advanced Sample Preparation Techniques for MS Analysis

Current literature in mass spectrometry

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