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  • 1.
    Riddell, Nicole
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik. Wellington Laboratories Inc., Guelph, Canada.
    Mullin, Lauren Gayle
    Örebro universitet, Institutionen för naturvetenskap och teknik. Waters Corporation, Milford, USA.
    van Bavel, Bert
    Örebro universitet, Institutionen för naturvetenskap och teknik. Norwegian Institute for Water Research, Oslo, Norway.
    Ericson Jogsten, Ingrid
    Örebro universitet, Institutionen för naturvetenskap och teknik.
    McAlees, Alan
    Wellington Laboratories Inc., Guelph, Canada.
    Brazeau, Allison
    Wellington Laboratories Inc., Guelph, Canada.
    Synnott, Scott
    Wellington Laboratories Inc., Guelph, Canada.
    Lough, Alan
    Department of Chemistry, University of Toronto, Toronto, Canada.
    McCrindle, Robert
    Wellington Laboratories Inc., Guelph, Canada; Chemistry Department, University of Guelph, Guelph, Canada.
    Chittim, Brock
    Wellington Laboratories Inc., Guelph, Canada.
    Enantioselective Analytical- and Preparative-Scale Separation of Hexabromocyclododecane Stereoisomers Using Packed Column Supercritical Fluid Chromatography2016Ingår i: Molecules, ISSN 1420-3049, E-ISSN 1420-3049, Vol. 21, nr 11, artikel-id 1509Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Hexabromocyclododecane (HBCDD) is an additive brominated flame retardant which has been listed in Annex A of the Stockholm Convention for elimination of production and use. It has been reported to persist in the environment and has the potential for enantiomer-specific degradation, accumulation, or both, making enantioselective analyses increasingly important. The six main stereoisomers of technical HBCDD (i.e., the (+) and (-) enantiomers of α-, β-, and γ-HBCDD) were separated and isolated for the first time using enantioselective packed column supercritical fluid chromatography (pSFC) separation methods on a preparative scale. Characterization was completed using published chiral liquid chromatography (LC) methods and elution profiles, as well as X-ray crystallography, and the isolated fractions were definitively identified. Additionally, the resolution of the enantiomers, along with two minor components of the technical product (δ- and ε-HBCDD), was investigated on an analytical scale using both LC and pSFC separation techniques, and changes in elution order were highlighted. Baseline separation of all HBCDD enantiomers was achieved by pSFC on an analytical scale using a cellulose-based column. The described method emphasizes the potential associated with pSFC as a green method of isolating and analyzing environmental contaminants of concern.

  • 2.
    Zeiner, Michaela
    et al.
    Örebro universitet, Institutionen för naturvetenskap och teknik. Division of Analytical Chemistry, Department of Chemistry, BOKU ⁻ University of Natural Resources and Life Sciences, Vienna, Austria.
    Kuhar, Ana
    Department of Chemistry, Faculty of Science, University of Zagreb, Zagreb, Croatia.
    Juranović Cindrić, Iva
    Department of Chemistry, Faculty of Science, University of Zagreb, Zagreb, Croatia.
    Geographic Differences in Element Accumulation in Needles of Aleppo Pines (Pinus halepensis Mill.) Grown in Mediterranean Region2019Ingår i: Molecules, ISSN 1420-3049, E-ISSN 1420-3049, Vol. 24, nr 10, artikel-id E1877Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Miller is a pine species native to the Mediterranean region, which has been used for restoration activities in arid and semiarid areas leading to vast spatial expansion. Needles from pine trees collected in the southeastern to northwestern extension of Croatia's coastal area at twelve sampling sites were analysed for twenty-one metals and metalloids. Statistical evaluation of the obtained data revealed significant differences for Al, As, B, Ba, Ca, Cr, Fe, K, Mg, Mn, Na, Se, and Sr between the different regions. Needles from trees growing on islands did not show elevated levels of Mg and/or Na as a result of the sea spray influence. The differences in metal accumulation are supposed to be linked to the environmental conditions at the respective sampling site, since the species was the same everywhere. By comparing the elemental contents of the soil those of with needles, it can be clearly seen, that the root as well as the foliar uptake contribute to the final amount.

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