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Sökning: swepub > Örebro universitet > Linköpings universitet > Borén Hans > Allard Bert

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1.
  • Dahlén, Johan, 1969-, et al. (författare)
  • Determination of the molecular weight of fulvic acids by UV/VIS spectroscopy
  • 1999
  • Ingår i: Chemosphere. - 0045-6535. ; 38:4, s. 783-794
  • Tidskriftsartikel (refereegranskat)abstract
    • Partial least squares (PLS) modeling was applied to investigate number-average molecular weights (Mn) and weight-average molecular weights (Mw) of fulvic acids (FAs) in relation to the corresponding UVNIS spectra. The Mn and Mw values were determined by size exclusion chromatography (SEC). The impact of pH control, wavelength range and density as well as smoothing and derivation of spectra were tested. It was found that PLS models based on absorbance spectra can be a fast and powerful complement to existing techniques employed for determination of molecular weights of FAs. Control of pH of the FA solutions is important for the performance of the models. The models were also compared with the best univariate alternatives.
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2.
  • Johansson, Inger, et al. (författare)
  • Analysis of water leachable organic components in incineration residues
  • 2000
  • Ingår i: International Journal of Environmental Analytical Chemistry. - 0306-7319. ; 78:3-4, s. 305-313
  • Tidskriftsartikel (refereegranskat)abstract
    • The composition of water leachable organics in municipal solid waste incineration (MSWI) residues is not well known. Therefore the utilisation of ashes is restricted due to the concern about their long-term environmental impact. Previous studies have focused on some highly toxic organic compounds present only in trace amounts. It is also important to know the composition of the bulk organic matter since dissolved organic carbon can alter the leachability of metals. In order to characterise water leachable organic matter in incineration residues a fractionation procedure using polymeric adsorbents was successfully developed and applied. The technique uses XAD-8 and XAD-4 resins in tandem and has been implemented on bottom ash samples from two incineration plants in Sweden in order to characterise the bulk organic matter.
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  • Resultat 1-2 av 2
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tidskriftsartikel (2)
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refereegranskat (2)
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Allard, Bert (2)Ta bort avgränsningen
Borén, Hans, (2)Ta bort avgränsningen
Bäckström, Mattias, (1)
Johansson, Inger, (1)
Dahlén, Johan, 1969- ... (1)
Ephraim, James (1)
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Pavasars, Ivars (1)
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Linköpings universitet  (2)Ta bort avgränsningen
Örebro universitet  (2)Ta bort avgränsningen
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Engelska (2)
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