Evaluation of new polymeric sorbents with high specific surface areas using an on-line solid-phase extraction-liquid chromatographic system for the trace-level determination of polar pesticides

Guenu, S.; Hennion, Marie‐Claire

doi:10.1016/0021-9673(96)00021-0

Cited by 61 publications

(41 citation statements)

References 23 publications

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“…In recent years, solid phase extraction (SPE) has widely been applied for the analysis of different pesticides in water samples, owing to the high enrichment factors achievable by this methodology using the high breakthrough volumes of materials such as C 18 (Picón et al, 2000;Zamora et al, 2003;Garrido Frenich et al, 2003), polystyrenedivinylbenzene (Guenu et al, 1996), ethylvinylbenzene-divinylbenzene (JunkerBuchheit, 1996, polystyrene (Shimamura et al, 1998) and active carbon (Jeannot et al, 2000). In this sense, Guenu et al used precolumns packed with PS-DVB sorbents for the on-line determination of very polar pesticides, including carbendazim (Guenu et al, 1996).…”

Section: Namementioning

confidence: 99%

“…In this sense, Guenu et al used precolumns packed with PS-DVB sorbents for the on-line determination of very polar pesticides, including carbendazim (Guenu et al, 1996). The evaluation of the PS-DVB sorbent was first carried out by measuring the recoveries using off-line extraction with a 20 mg PS-DVB cartridge and percolating drinking and river water both spiked with 0.1 µg·L -1 of each pesticide Limits of detections (LODs) were at the 0.05-0.3 µg·L -1 level in surface waters for different polar pesticides.…”

Section: Namementioning

confidence: 99%

“…Satisfactory predictions ranging from 102 to 114% for carbendazim, 96 to 115% for fuberidazole and 90 to 107% for thiabendazole were sufficiently low to determine pesticide residues in water samples (Picón et al, 2000;Garrido Frenich et al, 2003). SPE requires large volumes of sample (>200mL) and organic solvent (12-50 mL) and BFs losses occur during the evaporation of the extracts (Guenu et al, 1996). Recent developments in SPE field are mainly related to the use of new sorbent materials.…”

Section: Namementioning

confidence: 99%

See 2 more Smart Citations

Benzimidazole Fungicides in Environmental Samples: Extraction and Determination Procedures

Rodríguez¹,

Torres-Padrón²,

Aufartová³

et al. 2010

Fungicides

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Section: Namementioning

confidence: 99%

Section: Namementioning

confidence: 99%

Section: Namementioning

confidence: 99%

See 1 more Smart Citation

Benzimidazole Fungicides in Environmental Samples: Extraction and Determination Procedures

Rodríguez¹,

Torres-Padrón²,

Aufartová³

et al. 2010

Fungicides

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“…Le même problème peut être rencontré lorsque l'on utilise des copolymères de très haute surface spécifique. Toutefois il peut être contourné par l'utilisation d'une colonne analytique de PGC pour la séparation qui est alors réalisée avec une phase mobile plus riche en solvant organique [13]. Il est aussi possible d'utiliser une pompe analytique permettant de désorber les solutés de la phase carbonée par le solvant organique pur auquel est ajoutée, après la précolonne et avant la colonne analytique et ce par une pièce en T, la quantité d'eau néces-saire pour constituer la phase mobile adaptée à la séparation sur silice greffée [14].…”

Section: Tableauunclassified

Méthode de préconcentration par extraction en phase solide : principe et application aux industries environnementales et pétrolières

Chapuis

Pichon

Hennion

2005

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Cet article a pour objectif de présenter les caractéristiques de l'extraction en phase solide pour les analyses environnementales à partir de matrices ou d'extraits liquides. Les principes fondamentaux qui régissent l'extraction sont expliqués afin de pouvoir choisir la nature et la quantité de phase extractante selon la matrice des échantillons et les propriétés des solutés recherchés en s'appuyant sur les mécanismes de rétention des phases. Les derniers développements concernant les formats disponibles, la nature des phases et l'automatisation sont présentés. Un intérêt particulier est porté aux phases sélectives émergentes, notamment celles qui agissent par reconnaissance moléculaire telles les immunoadsorbants ou les polymères à empreinte moléculaire permettant en une seule étape d'avoir un extrait propre. Les performances de leur couplage en ligne avec la séparation par chromatographie en phase liquide sont illustrées par des exemples dans le domaine environnemental. Quelques exemples particuliers à l'analyse des produits pétroliers sont également présentés. Abstract -Preconcentration by Solid Phase Extraction: Principles and Applications in the Environmental and Petroleum Industries -The aim of this paper is to present the characteristics of

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“…N ew SDB with high specific surface areas have been shown to strongly retain polar analytes [23,24]. The problem is that the on-line coupling with a C 18 analytical column is difficult for on-line analysis of very polar analytes because the difference in retention by the two sorbents is too large.…”

Section: Selection Of the Sorbent In The Precolumnmentioning

confidence: 99%

Automation in multiresidue analysis of pesticides using on-line solid-phase extraction and liquid chromatography

Hennion¹

1998

Analusis

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Solid-phase ex t raction simplifies the sample pre t re atment step , but there is still some evap o ration and transfer of the extract. The on-line SPE-LC-UV diode array detection (UV-DAD) system is being used routinely in many laboratories and an increasing number of applications is currently described using on-line SPE-LC coupled to various interfaces and MS detection [1]. Important advantages in coupling on-line the pretreatment and the LC separation and detection are a decrease of the risk of contamination of the sample and sample extract, the removal of analyte losses by evaporation and finally the transfer and the analysis of the totality of the extracted species. In contrast to off-line SPE, where only an aliquot of the extract is injected into the chromatograph, the analysis of the complete sample allows the sample volume to be dramatically reduced to less than 5 -10 mL when SPE is coupled to GC or to 100 -150 mL when it is coupled to LC. It was surprising to see that GC has been the preferred method of environmental chemists for a long time, but that on-line systems using LC became the first robust on-line techniques. This is explained by the good compatibility of the LC aqueous mobile phases with the SPE of the samples. On-line coupling of SPE with GC is more delicate because of the inherent incompatibility between the aqueous part of the SPE step and the dry part of the GC system. Although not reported here, much work has been done in this area and automated devices have re c e n t ly become available. On-line set-up and precolumn designThe on-line set-up coupling SPE to LC is particularly easy to perform in any laboratory, and has been described extensively in general reviews [1][2][3][4][5][6][7][8][9]. The apparatus is represented in figure 1 [10]. The trace-enrichment is carried out on a small precolumn, generally made of stainless steel in order to be pressure-resistant, which is placed at the sample-loop position of a six-port liquid switching valve. A solvent delive ry unit (SDU) provides the solvents necessary to purge, wash, and activate the precolumn. After conditioning, sample application, and eventual clean-up via the pump of the SPE part, the precolumn is placed in front of an analytical column by switching the valve into the "inject" position. The trapped compounds are then eluted directly from the precolumn into the analytical column by a suitable mobile phase allowing the ch ro m at ographic sep a ration of the extracted analytes. Quantitative results of good accuracy can be expected as there is no sample manipulation between the preconcentration and the analysis. The LC system is often run in the reve rsed-phase mode, using C 1 8 a n a ly t i c a l columns because the mobile phase is a partly aqueous solvent mixture. Th e re fo re, residual water in the pre c o l u m n after the preconcentration of aqueous samples does not have to be removed before the desorption. The addition of a second sw i t ching va l ve allows both direct injection onto the analytical column and preconcentratio...

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Evaluation of new polymeric sorbents with high specific surface areas using an on-line solid-phase extraction-liquid chromatographic system for the trace-level determination of polar pesticides

Cited by 61 publications

References 23 publications

Benzimidazole Fungicides in Environmental Samples: Extraction and Determination Procedures

Benzimidazole Fungicides in Environmental Samples: Extraction and Determination Procedures

Méthode de préconcentration par extraction en phase solide : principe et application aux industries environnementales et pétrolières

Automation in multiresidue analysis of pesticides using on-line solid-phase extraction and liquid chromatography

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