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Vicent Yusa - One of the best experts on this subject based on the ideXlab platform.

  • determination of 40 currently used pesticides in airborne particulate matter pm 10 by microwave assisted extraction and gas chromatography coupled to triple quadrupole mass spectrometry
    Analytica Chimica Acta, 2011
    Co-Authors: Clara Coscolla, Mercedes Castillo, Agustin Pastor, Vicent Yusa
    Abstract:

    Abstract A confirmatory and sensitive procedure has been developed for the determination of 40 currently used pesticides (CUPs) in airborne particulate matter (PM 10) at trace level. The proposed method includes extraction of PM 10-bound pesticides by microwave-assisted extraction (MAE) followed by a gel permeation chromatography (GPC) clean-up and determination by GC–MS/MS. The injection mode and the main parameters in MS/MS were optimized. The matrix effect was also evaluated. Recoveries ranged from 70 to 120% except for pyrimethanil and pirimicarb. The limit of quantification (LOQ) ranged from 1.32 to 39.47 pg m −3 , when air volumes of 760 m 3 were collected. The method was applied to 38 samples collected from a rural station belonging to the Atmospheric Monitoring network of the Regional Valencia Government (Spain) during April–June 2010. Eighteen out of 40 pesticides investigated were found in at least one sample (bifenthrin, chlorothalonil, chlorpyriphos-e, chlorpyriphos-m, clorpropham, diazinon, dicofol, diphenylamine, fipronil, fludioxonil, folpet, malathion, metalaxyl, penconazole, quinoxyfen, triadimefon, trifluralin, and vinclozoline), with concentrations ranging from 1.32 to 625.80 pg m −3 .

  • multi residue analysis of 30 currently used pesticides in fine airborne particulate matter pm 2 5 by microwave assisted extraction and liquid chromatography tandem mass spectrometry
    Journal of Chromatography A, 2009
    Co-Authors: Clara Coscolla, Vicent Yusa, Ma Isabel Beser, Agustin Pastor
    Abstract:

    Abstract A confirmatory and rapid procedure has been developed for the determination of 30 currently used pesticides (CUP) in fine airborne particulate matter (PM 2.5) at trace level. The proposed method includes extraction of PM 2.5-bound pesticides by microwave-assisted extraction (MAE) followed by a direct injection into LC–MS/MS. The main parameters affecting the MAE extraction (time, temperature and volume of solvent) were optimised using statistical design of experiments (DoE). The matrix effect was also evaluated. Recoveries ranged from 72 to 109% and the limit of quantification (LoQ) was 32.5 pg m −3 for chlorpyrifos, 13.5 pg m −3 for fenhexamid, imazalil and prochloraz, and 6.5 pg m −3 for the rest of pesticides, when air volumes of 760 m 3 were collected. The method was applied to 54 samples collected from three stations of the Atmospheric Monitoring network of the Regional Valencia Government (Spain) during April–July 2009. Nineteen out of 30 pesticides investigated were found in at least one sample: omethoate, carbendazim, acetamiprid, thiabendazole, malathion, flusilazole, metalaxyl, azoxystrobin, iprovalicarb, myclobutanil, tebuconazole, triflumizole, cyprodinil, tebufenpyrad, buprofezin, pyriproxyfen, hexythiazox, flufenoxuron and fenazaquin. The measured concentrations ranged from 6.5 to 1208 pg m −3 . To our knowledge, 11 of the pesticides detected have been reported for the first time in ambient air.

Agustin Pastor - One of the best experts on this subject based on the ideXlab platform.

  • determination of 40 currently used pesticides in airborne particulate matter pm 10 by microwave assisted extraction and gas chromatography coupled to triple quadrupole mass spectrometry
    Analytica Chimica Acta, 2011
    Co-Authors: Clara Coscolla, Mercedes Castillo, Agustin Pastor, Vicent Yusa
    Abstract:

    Abstract A confirmatory and sensitive procedure has been developed for the determination of 40 currently used pesticides (CUPs) in airborne particulate matter (PM 10) at trace level. The proposed method includes extraction of PM 10-bound pesticides by microwave-assisted extraction (MAE) followed by a gel permeation chromatography (GPC) clean-up and determination by GC–MS/MS. The injection mode and the main parameters in MS/MS were optimized. The matrix effect was also evaluated. Recoveries ranged from 70 to 120% except for pyrimethanil and pirimicarb. The limit of quantification (LOQ) ranged from 1.32 to 39.47 pg m −3 , when air volumes of 760 m 3 were collected. The method was applied to 38 samples collected from a rural station belonging to the Atmospheric Monitoring network of the Regional Valencia Government (Spain) during April–June 2010. Eighteen out of 40 pesticides investigated were found in at least one sample (bifenthrin, chlorothalonil, chlorpyriphos-e, chlorpyriphos-m, clorpropham, diazinon, dicofol, diphenylamine, fipronil, fludioxonil, folpet, malathion, metalaxyl, penconazole, quinoxyfen, triadimefon, trifluralin, and vinclozoline), with concentrations ranging from 1.32 to 625.80 pg m −3 .

  • multi residue analysis of 30 currently used pesticides in fine airborne particulate matter pm 2 5 by microwave assisted extraction and liquid chromatography tandem mass spectrometry
    Journal of Chromatography A, 2009
    Co-Authors: Clara Coscolla, Vicent Yusa, Ma Isabel Beser, Agustin Pastor
    Abstract:

    Abstract A confirmatory and rapid procedure has been developed for the determination of 30 currently used pesticides (CUP) in fine airborne particulate matter (PM 2.5) at trace level. The proposed method includes extraction of PM 2.5-bound pesticides by microwave-assisted extraction (MAE) followed by a direct injection into LC–MS/MS. The main parameters affecting the MAE extraction (time, temperature and volume of solvent) were optimised using statistical design of experiments (DoE). The matrix effect was also evaluated. Recoveries ranged from 72 to 109% and the limit of quantification (LoQ) was 32.5 pg m −3 for chlorpyrifos, 13.5 pg m −3 for fenhexamid, imazalil and prochloraz, and 6.5 pg m −3 for the rest of pesticides, when air volumes of 760 m 3 were collected. The method was applied to 54 samples collected from three stations of the Atmospheric Monitoring network of the Regional Valencia Government (Spain) during April–July 2009. Nineteen out of 30 pesticides investigated were found in at least one sample: omethoate, carbendazim, acetamiprid, thiabendazole, malathion, flusilazole, metalaxyl, azoxystrobin, iprovalicarb, myclobutanil, tebuconazole, triflumizole, cyprodinil, tebufenpyrad, buprofezin, pyriproxyfen, hexythiazox, flufenoxuron and fenazaquin. The measured concentrations ranged from 6.5 to 1208 pg m −3 . To our knowledge, 11 of the pesticides detected have been reported for the first time in ambient air.

Clara Coscolla - One of the best experts on this subject based on the ideXlab platform.

  • determination of 40 currently used pesticides in airborne particulate matter pm 10 by microwave assisted extraction and gas chromatography coupled to triple quadrupole mass spectrometry
    Analytica Chimica Acta, 2011
    Co-Authors: Clara Coscolla, Mercedes Castillo, Agustin Pastor, Vicent Yusa
    Abstract:

    Abstract A confirmatory and sensitive procedure has been developed for the determination of 40 currently used pesticides (CUPs) in airborne particulate matter (PM 10) at trace level. The proposed method includes extraction of PM 10-bound pesticides by microwave-assisted extraction (MAE) followed by a gel permeation chromatography (GPC) clean-up and determination by GC–MS/MS. The injection mode and the main parameters in MS/MS were optimized. The matrix effect was also evaluated. Recoveries ranged from 70 to 120% except for pyrimethanil and pirimicarb. The limit of quantification (LOQ) ranged from 1.32 to 39.47 pg m −3 , when air volumes of 760 m 3 were collected. The method was applied to 38 samples collected from a rural station belonging to the Atmospheric Monitoring network of the Regional Valencia Government (Spain) during April–June 2010. Eighteen out of 40 pesticides investigated were found in at least one sample (bifenthrin, chlorothalonil, chlorpyriphos-e, chlorpyriphos-m, clorpropham, diazinon, dicofol, diphenylamine, fipronil, fludioxonil, folpet, malathion, metalaxyl, penconazole, quinoxyfen, triadimefon, trifluralin, and vinclozoline), with concentrations ranging from 1.32 to 625.80 pg m −3 .

  • multi residue analysis of 30 currently used pesticides in fine airborne particulate matter pm 2 5 by microwave assisted extraction and liquid chromatography tandem mass spectrometry
    Journal of Chromatography A, 2009
    Co-Authors: Clara Coscolla, Vicent Yusa, Ma Isabel Beser, Agustin Pastor
    Abstract:

    Abstract A confirmatory and rapid procedure has been developed for the determination of 30 currently used pesticides (CUP) in fine airborne particulate matter (PM 2.5) at trace level. The proposed method includes extraction of PM 2.5-bound pesticides by microwave-assisted extraction (MAE) followed by a direct injection into LC–MS/MS. The main parameters affecting the MAE extraction (time, temperature and volume of solvent) were optimised using statistical design of experiments (DoE). The matrix effect was also evaluated. Recoveries ranged from 72 to 109% and the limit of quantification (LoQ) was 32.5 pg m −3 for chlorpyrifos, 13.5 pg m −3 for fenhexamid, imazalil and prochloraz, and 6.5 pg m −3 for the rest of pesticides, when air volumes of 760 m 3 were collected. The method was applied to 54 samples collected from three stations of the Atmospheric Monitoring network of the Regional Valencia Government (Spain) during April–July 2009. Nineteen out of 30 pesticides investigated were found in at least one sample: omethoate, carbendazim, acetamiprid, thiabendazole, malathion, flusilazole, metalaxyl, azoxystrobin, iprovalicarb, myclobutanil, tebuconazole, triflumizole, cyprodinil, tebufenpyrad, buprofezin, pyriproxyfen, hexythiazox, flufenoxuron and fenazaquin. The measured concentrations ranged from 6.5 to 1208 pg m −3 . To our knowledge, 11 of the pesticides detected have been reported for the first time in ambient air.

V Formisano - One of the best experts on this subject based on the ideXlab platform.

  • the current weather and climate of mars 12 years of Atmospheric Monitoring by the planetary fourier spectrometer on mars express
    Icarus, 2021
    Co-Authors: M Giuranna, Davide Grassi, Paulina Wolkenberg, A Aronica, Shohei Aoki, Diego Scaccabarozzi, Bortolino Saggin, V Formisano
    Abstract:

    Abstract We used thermal-infrared spectra returned by the Mars Express Planetary Fourier Spectrometer (PFS/MEx) to retrieve Atmospheric temperature profiles, surface temperatures, and column-integrated optical depths of dust and water ice. More than 2,500,000 spectra were processed to build this new Atmospheric dataset, covering the full range of season, latitude, longitude, and local time. The data presented here span more than six Martian Years (from MY 26, Ls = 331°, 10 January 2004 to MY 33, Ls = 78°, 6 December 2015). We present an overview of the seasonal and latitudinal dependence of the above Atmospheric quantities for the relevant period, as well as an assessment of the interannual variability in the current Martian climate. The general effect of suspended dust on Atmospheric temperatures observed during the global dust storm of MY 28 is also presented. Atmospheric temperatures and aerosol opacity were successfully retrieved over cold surface areas and in the polar regions, including the polar nights. Rather than the aphelion cloud belt, the most prominent feature one can observe in the climatology of the Martian water ice clouds is the seasonal extent, pattern and thickness of the North polar hoods (NPH), where most of the thickest clouds are observed. The NPH also shows peculiar features, observed in detail here for the first time, with characteristic spatial and seasonal patterns that repeat very similarly every Martian year. By exploiting PFS/MEx capability to perform observations at different local times (LT), this dataset allowed the characterization of how dust and ice cloud optical depths vary throughout the day on Mars. We present observations of the dust daily cycle during non-dusty seasons; the daily variation of water ice opacity in the aphelion cloud belt; and the diurnal variation of the North and South polar hoods. With unprecedented spatial and temporal coverage and details revealed, this dataset offers new challenges to the Martian global circulation models and, at the same time, a new reference for the MYs complementary to those observed by previous orbiters.

M Giuranna - One of the best experts on this subject based on the ideXlab platform.

  • the current weather and climate of mars 12 years of Atmospheric Monitoring by the planetary fourier spectrometer on mars express
    Icarus, 2021
    Co-Authors: M Giuranna, Davide Grassi, Paulina Wolkenberg, A Aronica, Shohei Aoki, Diego Scaccabarozzi, Bortolino Saggin, V Formisano
    Abstract:

    Abstract We used thermal-infrared spectra returned by the Mars Express Planetary Fourier Spectrometer (PFS/MEx) to retrieve Atmospheric temperature profiles, surface temperatures, and column-integrated optical depths of dust and water ice. More than 2,500,000 spectra were processed to build this new Atmospheric dataset, covering the full range of season, latitude, longitude, and local time. The data presented here span more than six Martian Years (from MY 26, Ls = 331°, 10 January 2004 to MY 33, Ls = 78°, 6 December 2015). We present an overview of the seasonal and latitudinal dependence of the above Atmospheric quantities for the relevant period, as well as an assessment of the interannual variability in the current Martian climate. The general effect of suspended dust on Atmospheric temperatures observed during the global dust storm of MY 28 is also presented. Atmospheric temperatures and aerosol opacity were successfully retrieved over cold surface areas and in the polar regions, including the polar nights. Rather than the aphelion cloud belt, the most prominent feature one can observe in the climatology of the Martian water ice clouds is the seasonal extent, pattern and thickness of the North polar hoods (NPH), where most of the thickest clouds are observed. The NPH also shows peculiar features, observed in detail here for the first time, with characteristic spatial and seasonal patterns that repeat very similarly every Martian year. By exploiting PFS/MEx capability to perform observations at different local times (LT), this dataset allowed the characterization of how dust and ice cloud optical depths vary throughout the day on Mars. We present observations of the dust daily cycle during non-dusty seasons; the daily variation of water ice opacity in the aphelion cloud belt; and the diurnal variation of the North and South polar hoods. With unprecedented spatial and temporal coverage and details revealed, this dataset offers new challenges to the Martian global circulation models and, at the same time, a new reference for the MYs complementary to those observed by previous orbiters.