Water, Air, and Soil Pollution

, Volume 84, Issue 1–2, pp 103–116 | Cite as

Studies of aluminium complexation to humic and fulvic acids using a method for the determination of quickly reacting aluminium

  • N. Clarke
  • L. -G. Danielsson
  • A. Sparén


We have recently presented a method for the determination of quickly reacting aluminium in natural waters based on kinetic discrimination in a flow system. This method has been further validated using both an isolated fulvic acid and natural humus-rich waters. Different reaction times were used, further clarifying the response of aluminium complexed with humic and fulvic acids. Equilibrium dialysis was also used as a reference method for comparison. With the reaction time used normally, 2.3 s, aluminium complexed with humic or fulvic acids was shown not to be measured with our method. These results suggest that our method may be used for studies of the complexation of aluminium with humic and fulvic acids. We have compared results from a series of solutions with varying concentrations of fulvic acids with calculations based on two different models obtained from complexation studies performed by potentiometric titrations and by equilibrium dialysis. The results show fair agreement and suggest that our method can be used for such studies. This approach is more sensitive and rapid than potentiometric titrations, enabling studies of humus interactions with aluminium at concentrations similar to those found in natural waters.


Aluminium Reaction Time Titration Humus Natural Water 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



Concentration of all dissolved alumininium that has not reacted with RFA


Quickly Reacting Aluminium


Concentration of complexes formed between Al and RFA


Total aluminium concentration


Diethylaminoethyl cellulose


Flow Injection Analysis


Fulvic acid


Graphite Furnace Atomic Absorption Spectrophotometry


Diprotic ligand used by Lövgren et al. (1987) as a model compound for organic matter in a concentrated bog water


Humic substances


Inductively Coupled Plasma Optical Emission Spectrometry


Conditional equilibrium constant


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Copyright information

© Kluwer Academic Publishers 1995

Authors and Affiliations

  • N. Clarke
    • 1
  • L. -G. Danielsson
    • 1
  • A. Sparén
    • 1
  1. 1.Division of Analytical ChemistryThe Royal Institute of TechnologyStockholmSweden

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