3 research outputs found

    Application de l'analyse métabolomique à la détection ciblée et globale de contaminants organiques dans des matrices agroalimentaires et environnementales par spectrométrie de masse à ultra-haute résolution

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    Pollution of agrifood and environmental water by pesticides and drugs is a real public health concern. There are many quantitative methods developed on triple quadrupole mass spectrometer for their detection, but drug residues and abiotic or biological degradation of pollutants are generally not considered and are limited to a predetermined and restricted list of molecules.In this context, we have developed an analytical method based on metabolomic analyses by high performance liquid chromatography coupled with ultra-high resolution mass spectrometry (LC-HRMS). Two matrices (honey and groundwater) were investigated as proof of concept studies. We showed that LC-HRMS associated to data mining tools enables (i) targeted analyses of pollutants, (ii) detection of untargeted and unknown xenobiotics, and (iii) detection of metabolites useful for the characterization of matrices. Then, a large targeted and semi-quantitative approach has been developed and validated for the detection of pesticides, drugs and metabolites in water samples by using on line SPE and UHPLC-ESI-HRMS. This method allowed the detection of 539 organic contaminants at the MLR of 0.1 ”g/L in 36 minutes with only 5 milliliter of water. A study of 26 tap water samples from the Paris region showed the presence of 37 pollutants including 6 drugs.La pollution des produits agroalimentaires et des eaux environnementales par les substances phytosanitaires et les mĂ©dicaments est une rĂ©elle prĂ©occupation de santĂ© publique. Il existe aujourd’hui de nombreuses mĂ©thodes d’analyses quantitatives dĂ©veloppĂ©es sur des appareils de type triple quadripĂŽle pour leur dĂ©tection mais elles ne se prĂ©occupent peu ou pas des rĂ©sidus mĂ©dicamenteux et des produits de dĂ©gradation abiotique ou biologique des polluants et sont limitĂ©es Ă  un nombre restreint et figĂ© de molĂ©cules.Dans ce contexte, nous avons dĂ©veloppĂ© une mĂ©thode d’analyse basĂ©e sur la mĂ©tabolomique par chromatographie liquide haute performance couplĂ©e Ă  la spectromĂ©trie de masse Ă  ultra-haute rĂ©solution (LC-HRMS). Deux matrices (miel et eau souterraine) ont ainsi Ă©tĂ© Ă©tudiĂ©es comme preuve de concept. Nous avons montrĂ© que la LC-HRMS associĂ©e Ă  des outils de fouille de donnĂ©es permet (i) une recherche ciblĂ©e de polluants prioritaires, (ii) la dĂ©tection sans a priori de contaminants inattendus ou inconnus et (iii) la recherche de mĂ©tabolites nĂ©cessaire Ă  la classification des Ă©chantillons en fonction de leur mĂ©tadonnĂ©e (adultĂ©ration, origine gĂ©ographique, etc.). Ensuite, une approche semi-quantitative ciblĂ©e large spectre a Ă©tĂ© dĂ©veloppĂ©e et validĂ©e pour la dĂ©tection de pesticides, mĂ©dicaments et mĂ©tabolites dans l’eau par couplage de la SPE en ligne avec l’UHPLC-ESI-HRMS. Cette mĂ©thode permet la dĂ©tection de 539 contaminants organiques en 36 minutes dans 5 millilitres d’eau au seuil minimum rĂ©glementaire de 0,1 ”g/L. L’étude de 26 eaux du robinet de la rĂ©gion parisienne a permis de mettre en Ă©vidence la prĂ©sence Ă  l’état de trace de 37 polluants dont 6 mĂ©dicaments

    Application of metabolomics analysis to targeted and comprehensive detection of organic contaminants in food and environmental matrices using ultra-high resolution mass spectrometry

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    La pollution des produits agroalimentaires et des eaux environnementales par les substances phytosanitaires et les mĂ©dicaments est une rĂ©elle prĂ©occupation de santĂ© publique. Il existe aujourd’hui de nombreuses mĂ©thodes d’analyses quantitatives dĂ©veloppĂ©es sur des appareils de type triple quadripĂŽle pour leur dĂ©tection mais elles ne se prĂ©occupent peu ou pas des rĂ©sidus mĂ©dicamenteux et des produits de dĂ©gradation abiotique ou biologique des polluants et sont limitĂ©es Ă  un nombre restreint et figĂ© de molĂ©cules.Dans ce contexte, nous avons dĂ©veloppĂ© une mĂ©thode d’analyse basĂ©e sur la mĂ©tabolomique par chromatographie liquide haute performance couplĂ©e Ă  la spectromĂ©trie de masse Ă  ultra-haute rĂ©solution (LC-HRMS). Deux matrices (miel et eau souterraine) ont ainsi Ă©tĂ© Ă©tudiĂ©es comme preuve de concept. Nous avons montrĂ© que la LC-HRMS associĂ©e Ă  des outils de fouille de donnĂ©es permet (i) une recherche ciblĂ©e de polluants prioritaires, (ii) la dĂ©tection sans a priori de contaminants inattendus ou inconnus et (iii) la recherche de mĂ©tabolites nĂ©cessaire Ă  la classification des Ă©chantillons en fonction de leur mĂ©tadonnĂ©e (adultĂ©ration, origine gĂ©ographique, etc.). Ensuite, une approche semi-quantitative ciblĂ©e large spectre a Ă©tĂ© dĂ©veloppĂ©e et validĂ©e pour la dĂ©tection de pesticides, mĂ©dicaments et mĂ©tabolites dans l’eau par couplage de la SPE en ligne avec l’UHPLC-ESI-HRMS. Cette mĂ©thode permet la dĂ©tection de 539 contaminants organiques en 36 minutes dans 5 millilitres d’eau au seuil minimum rĂ©glementaire de 0,1 ”g/L. L’étude de 26 eaux du robinet de la rĂ©gion parisienne a permis de mettre en Ă©vidence la prĂ©sence Ă  l’état de trace de 37 polluants dont 6 mĂ©dicaments.Pollution of agrifood and environmental water by pesticides and drugs is a real public health concern. There are many quantitative methods developed on triple quadrupole mass spectrometer for their detection, but drug residues and abiotic or biological degradation of pollutants are generally not considered and are limited to a predetermined and restricted list of molecules.In this context, we have developed an analytical method based on metabolomic analyses by high performance liquid chromatography coupled with ultra-high resolution mass spectrometry (LC-HRMS). Two matrices (honey and groundwater) were investigated as proof of concept studies. We showed that LC-HRMS associated to data mining tools enables (i) targeted analyses of pollutants, (ii) detection of untargeted and unknown xenobiotics, and (iii) detection of metabolites useful for the characterization of matrices. Then, a large targeted and semi-quantitative approach has been developed and validated for the detection of pesticides, drugs and metabolites in water samples by using on line SPE and UHPLC-ESI-HRMS. This method allowed the detection of 539 organic contaminants at the MLR of 0.1 ”g/L in 36 minutes with only 5 milliliter of water. A study of 26 tap water samples from the Paris region showed the presence of 37 pollutants including 6 drugs

    High-Resolution Mass Spectrometry Associated with Data Mining Tools for the Detection of Pollutants and Chemical Characterization of Honey Samples

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    Analytical methods for food control are mainly focused on restricted lists of well-known contaminants. This paper shows that liquid chromatography–high-resolution mass spectrometry (LC/ESI-HRMS) associated with the data mining tools developed for metabolomics can address this issue by enabling (i) targeted analyses of pollutants, (ii) detection of untargeted and unknown xenobiotics, and (iii) detection of metabolites useful for the characterization of food matrices. A proof-of-concept study was performed on 76 honey samples. Targeted analysis indicated that 35 of 83 targeted molecules were detected in the 76 honey samples at concentrations below regulatory limits. Furthermore, untargeted metabolomic-like analyses highlighted 12 chlorinated xenobiotics, 1 of which was detected in lavender honey samples and identified as 2,6-dichlorobenzamide, a metabolite of dichlobenil, a pesticide banned in France since 2010. Lastly, multivariate statistical analyses discriminated honey samples according to their floral origin, and six discriminating metabolites were characterized thanks to the MS/MS experiments
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