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  1. AU="Janzen, Kim"
  2. AU="Doug Beare"
  3. AU="Gisela Vecchio"
  4. AU="Sanguineti, M."
  5. AU="Cowie, Bruce"
  6. AU="Vílchez-Acosta, Alba"
  7. AU="Schierbaum, Luca"
  8. AU="Manea, M"
  9. AU=Slimano Florian
  10. AU="Awais, M."
  11. AU="Youn, Jong-Ung"
  12. AU="Song, Min-Gyu"
  13. AU="Sawada, Takashi"
  14. AU="Ferrucci, Francesco"
  15. AU="Agrawal, Karan"

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  1. Artikel ; Online: On the urgent need for standardization in isotope‐based ecohydrological investigations

    Millar, Cody / Janzen, Kim / Nehemy, Magali F. / Koehler, Geoff / Hervé‐Fernández, Pedro / Wang, Hongxiu / Orlowski, Natalie / Barbeta, Adrià / McDonnell, Jeffrey J.

    Hydrological Processes. 2022 Oct., v. 36, no. 10 p.e14698-

    2022  

    Abstract: Ecohydrological investigations commonly use the stable isotopes of water (hydrogen and oxygen) as conservative ecosystem tracers. This approach requires accessing and analysing water from plant and soil matrices. Generally, there are six steps involved ... ...

    Abstract Ecohydrological investigations commonly use the stable isotopes of water (hydrogen and oxygen) as conservative ecosystem tracers. This approach requires accessing and analysing water from plant and soil matrices. Generally, there are six steps involved to retrieve hydrogen and oxygen isotope values from these matrices: (1) sampling, (2) sample storage and transport, (3) extraction, (4) pre‐analysis processing, (5) isotopic analysis, and (6) post‐processing and correction. At each step, cumulative errors can be introduced which sum to non‐trivial magnitudes. These can impact subsequent interpretations about water cycling and partitioning through the soil–plant‐atmosphere continuum. At each of these steps, there are multiple possible options to select from resulting in tens of thousands of possible combinations used by researchers to go from plant and soil samples to isotopic data. In a newly emerging field, so many options can create interpretive confusion and major issues with data comparability. This points to the need for development of shared standardized approaches. Here we critically examine the state of the process chain, reflecting on the issues associated with each step, and provide suggestions to move our community towards standardization. Assessing this shared ‘process chain’ will help us see the problem in its entirety and facilitate community action towards agreed upon standardized approaches.
    Schlagwörter community development ; ecosystems ; hydrogen ; hydrologic cycle ; isotope labeling ; oxygen ; oxygen isotopes ; soil
    Sprache Englisch
    Erscheinungsverlauf 2022-10
    Erscheinungsort John Wiley & Sons, Inc.
    Dokumenttyp Artikel ; Online
    Anmerkung JOURNAL ARTICLE
    ZDB-ID 1479953-4
    ISSN 1099-1085 ; 0885-6087
    ISSN (online) 1099-1085
    ISSN 0885-6087
    DOI 10.1002/hyp.14698
    Datenquelle NAL Katalog (AGRICOLA)

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  2. Artikel ; Online: Organic contamination detection for isotopic analysis of water by laser spectroscopy.

    Millar, Cody / Janzen, Kim / Nehemy, Magali F / Koehler, Geoff / Hervé-Fernández, Pedro / McDonnell, Jeffrey J

    Rapid communications in mass spectrometry : RCM

    2021  , Seite(n) e9118

    Abstract: Rationale: Hydrogen and oxygen stable isotope ratios (δ: Methods: Errors induced by methanol and ethanol water mixtures on measured IRIS and IRMS results were evaluated. For IRIS analyses both liquid and vapour-mode (via direct vapour equilibration) ... ...

    Abstract Rationale: Hydrogen and oxygen stable isotope ratios (δ
    Methods: Errors induced by methanol and ethanol water mixtures on measured IRIS and IRMS results were evaluated. For IRIS analyses both liquid and vapour-mode (via direct vapour equilibration) methods are used. The δ
    Results: Organic contamination induced significant errors in IRIS results which were not seen in IRMS results. Methanol caused larger errors than ethanol. Results from vapour-IRIS analyses had larger errors than those from liquid-IRIS analyses. The
    Conclusion: Organic contamination caused significant errors in IRIS stable isotope results. These errors were larger during vapour analysis than during liquid IRIS analyses, and larger for methanol than ethanol contamination. The
    Sprache Englisch
    Erscheinungsdatum 2021-05-03
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 58731-x
    ISSN 1097-0231 ; 0951-4198
    ISSN (online) 1097-0231
    ISSN 0951-4198
    DOI 10.1002/rcm.9118
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: 17

    Nehemy, Magali F / Millar, Cody / Janzen, Kim / Gaj, Marcel / Pratt, Dyan L / Laroque, Colin P / McDonnell, Jeffrey J

    Rapid communications in mass spectrometry : RCM

    2019  Band 33, Heft 16, Seite(n) 1301–1310

    Abstract: Rationale: The stable isotope compositions of hydrogen and oxygen in water (δ: Methods: We performed isotopic analysis using the δ: Results: The : Conclusions: ... ...

    Abstract Rationale: The stable isotope compositions of hydrogen and oxygen in water (δ
    Methods: We performed isotopic analysis using the δ
    Results: The
    Conclusions: 17
    Sprache Englisch
    Erscheinungsdatum 2019-06-06
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 58731-x
    ISSN 1097-0231 ; 0951-4198
    ISSN (online) 1097-0231
    ISSN 0951-4198
    DOI 10.1002/rcm.8470
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.A 3461: Hefte anzeigen Standort:
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    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
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  4. Artikel ; Online: PAH distributions in sediments in the oil sands monitoring area and western Lake Athabasca: Concentration, composition and diagnostic ratios.

    Evans, Marlene / Davies, Martin / Janzen, Kim / Muir, Derek / Hazewinkel, Rod / Kirk, Jane / de Boer, Dirk

    Environmental pollution (Barking, Essex : 1987)

    2016  Band 213, Seite(n) 671–687

    Abstract: Oil sands activities north of Fort McMurray, Alberta, have intensified in recent years with a concomitant debate as to their environmental impacts. The Regional Aquatics Monitoring Program and its successor, the Joint Canada-Alberta Implementation Plan ... ...

    Abstract Oil sands activities north of Fort McMurray, Alberta, have intensified in recent years with a concomitant debate as to their environmental impacts. The Regional Aquatics Monitoring Program and its successor, the Joint Canada-Alberta Implementation Plan for Oil Sands Monitoring (JOSM), are the primary aquatic programs monitoring this industry. Here we examine sediment data (collected by Ekman grabs) to investigate trends and sources of polycyclic aromatic hydrocarbons (PAHs), supplementing these data with sediment core studies. Total PAH (ΣPAH) concentrations were highest at Shipyard Lake (6038 ± 2679 ng/g) in the development center and lower at Isadore's Lake (1660 ± 777 ng/g) to the north; both lakes are in the Athabasca River Valley and lie below the developments. ΣPAH concentrations were lower (622-930 ng/g) in upland lakes (Kearl, McClelland) located further away from the developments. ΣPAH concentrations increased at Shipyard Lake (2001-2014) and the Ells River mouth (1998-2014) but decreased in nearshore areas at Kearl Lake (2001-2014) and a Muskeg River (2000-2014) site. Over the longer term, ΣPAH concentrations increased in Kearl (1934-2012) and Sharkbite (1928-2010) Lakes. Further (200 km) downstream in the Athabasca River delta, ΣPAH concentrations (1029 ± 671 ng/g) increased (1999-2014) when %sands were included in the regression model; however, 50 km to the east, concentrations declined (1926-2009) in Lake Athabasca. Ten diagnostic ratios based on anthracene, phenanthrene, fluoranthene, pyrene, benz[a]anthracene, chrysene, indeno[123-cd]pyrene, dibenz[a,h]anthracene, dibenzothiophene and retene were examined to infer spatial and temporal trends in PAH sources (e.g., combustion versus petrogenic) and weathering. There was some evidence of increasing contributions of unprocessed oil sands and bitumen dust to Shipyard, Sharkbite, and Isadore's Lakes and increased combustion sources in the Athabasca River delta. Some CCME interim sediment quality guidelines were exceeded, primarily in Shipyard Lake and near presumed natural bitumen sources.
    Mesh-Begriff(e) Alberta ; Environmental Monitoring ; Geologic Sediments/analysis ; Lakes/analysis ; Oil and Gas Fields/chemistry ; Polycyclic Aromatic Hydrocarbons/analysis ; Water Pollutants, Chemical/analysis
    Chemische Substanzen Polycyclic Aromatic Hydrocarbons ; Water Pollutants, Chemical
    Sprache Englisch
    Erscheinungsdatum 2016-06
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 280652-6
    ISSN 1873-6424 ; 0013-9327 ; 0269-7491
    ISSN (online) 1873-6424
    ISSN 0013-9327 ; 0269-7491
    DOI 10.1016/j.envpol.2016.03.014
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Verfügbar in ZB MED Köln/Königswinter

    Zs.A 2599: Hefte anzeigen Standort:
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