Characterization of photodegradation products of alachlor in water by on-line solid-phase extraction liquid chromatography combined with tandem mass spectrometry and orthogonal-acceleration time-of-flight mass spectrometry

Hogenboom, A.C.; Niessen, W.M.A.; Brinkman, U.A.Th.

doi:10.1002/1097-0231(20001030)14:20<1914::aid-rcm112>3.0.co;2-r

Cited by 48 publications

(11 citation statements)

References 20 publications

(56 reference statements)

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“…for pesticides TPs). Despite all these characteristics, this technique has rarely been used in the environmental field 13–20…”

Section: Introductionmentioning

confidence: 99%

“…The usefulness of photodegradation experiments on aqueous samples has been shown as a means to elucidate pesticide TPs formed in water 13, 16, 18–20. As an example, the most important triazine photodegradation products identified by LC‐QTOF under laboratory controlled conditions13 were included in a multiresidue LC‐MS/MS QqQ method developed in our laboratory 21.…”

Section: Introductionmentioning

confidence: 99%

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Investigating the presence of pesticide transformation products in water by using liquid chromatography‐mass spectrometry with different mass analyzers

et al. 2007

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Registro de acceso restringido Este recurso no está disponible en acceso abierto por política de la editorial. No obstante, se puede acceder al texto completo desde la Universitat Jaume I o si el usuario cuenta con suscripción. Registre d'accés restringit Aquest recurs no està disponible en accés obert per política de l'editorial. No obstant això, es pot accedir al text complet des de la Universitat Jaume I o si l'usuari compta amb subscripció. Restricted access item This item isn't open access because of publisher's policy. The full--text version is only available from Jaume I University or if the user has a running suscription to the publisher's contents.

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“…for pesticides TPs). Despite all these characteristics, this technique has rarely been used in the environmental field 13–20…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigating the presence of pesticide transformation products in water by using liquid chromatography‐mass spectrometry with different mass analyzers

et al. 2007

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“…Due to the high mass accuracy and inherent high sensitivity in full scan mode, liquid chromatography/timeof-flight mass spectrometry (LC/TOF-MS) has been successfully used in the confirmation of pesticides as well as emerging contaminants in the environmental field. [1][2][3][4] LC/TOF-MS has been used to identify structures proposed for transformation products, e.g., photodegradation products of alachlor 5 and diuron, 6 or alachlor and acetochlor degradates. 7 In these cases, LC/TOF has been combined with MS/MS experiments using a triple quadrupole mass spectrometer, 5 an ion trap mass spectrometer, 6 or in-source collisioninduced dissociation (CID), 5,7 for final structural elucidation of 'unknowns'.…”

mentioning

confidence: 99%

Use of quadrupole time‐of‐flight mass spectrometry in the elucidation of unknown compounds present in environmental water

Ibáñez

Sancho

Pozo

et al. 2004

Rapid Comm Mass Spectrometry

135

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Target compound monitoring is often not sufficient to assess the quality of water, as many of the unknown micro-contaminants present might be a threat to the environment and human health. In this work, the potential of hybrid quadrupole time-of-flight mass spectrometry (QTOF-MS) coupled to liquid chromatography (LC) in the elucidation of unknown compounds in environmental water samples has been explored. Based on accurate mass measurement, possible elemental compositions for the precursor ions were calculated. Using model compounds, a useful strategy was developed, enabling determination and evaluation of potential molecular formulae for the detected unknowns. The possibility of performing tandem mass spectrometric (MS/MS) acquisitions to obtain product ion spectra in accurate mass mode also helped to elucidate the structures of these unknowns or to detect some functional groups, to further evaluate potential formulae. The remaining formulae were searched against available databases such as the Merck Index and the NIST library. Where standards were commercially available, retention time and MS/MS data were both also used as confirmatory tools. The approach developed was applied for the identification of unknown compounds in different types of water. To improve sensitivity, environmental water samples were preconcentrated on-line in a polymeric cartridge by direct injection of 2 mL water into the SPE-LC/MS/MS system. For three unknowns, structures were proposed and confirmed with standards. Although other compounds could not be unequivocally identified based on the data available within this study, details about the possible structures of some are given.

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“…A scheme of the configuration of a Q‐TOF analyzer, which consists of a quadrupole front‐end and an orthogonal‐acceleration TOF backend for MS/MS, is presented in Figure 6. All these features, which make Q‐TOF instruments ideally suited for screening purposes of unknown compounds (Bobeldijk et al, 2001b; Reemtsma, 2003), have been exploited or evaluated by various authors in the identification and quantification of pesticides and their TPs in water (Hogenboom et al, 1999; Hogenboom, Niessen, & Brinkman, 2000; Maizels & Budde, 2001; Thurman, Ferrer, & Parry, 2002; Sancho, Pozo, & Hernández, 2004).…”

Section: Analytical Methodologiesmentioning

confidence: 99%

Analysis of pesticides in water by liquid chromatography‐tandem mass spectrometric techniques

Kuster

Alda

Barceló

2006

Mass Spectrometry Reviews

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Pesticide residues continue to be the focus of many environmental studies, and the number of articles describing the development of more advanced, multiresidue analytical methodologies does not decline. The use of liquid chromatography-mass spectrometry based on single quadrupole or ion trap analyzers is consolidated for this purpose. The implementation, in the near future, of more sophisticated mass analyzers, such as triple quadrupole and hybrid quadrupole-time-of-flight is anticipated for routine analysis. This article reviews the various works published so far in the literature for the determination of pesticides and transformation products (TPs) in water by means of liquid chromatography (LC) coupled to tandem mass spectrometry. It discusses the various ionization sources and analyzers used for this purpose, as well as the extraction procedures employed for previous sample preconcentration. Because of the widespread use of triple quadrupole analyzers for the generation of pesticides levels in water using tandem mass spectrometry, a table compiling the transitions monitored for ca. 70 compounds is also included.

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Characterization of photodegradation products of alachlor in water by on-line solid-phase extraction liquid chromatography combined with tandem mass spectrometry and orthogonal-acceleration time-of-flight mass spectrometry

Cited by 48 publications

References 20 publications

Investigating the presence of pesticide transformation products in water by using liquid chromatography‐mass spectrometry with different mass analyzers

Investigating the presence of pesticide transformation products in water by using liquid chromatography‐mass spectrometry with different mass analyzers

Use of quadrupole time‐of‐flight mass spectrometry in the elucidation of unknown compounds present in environmental water

Analysis of pesticides in water by liquid chromatography‐tandem mass spectrometric techniques

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