Determination of metallic complexing capacities of the dissolved organic material in seawater

Authors

  • Luis M. Laglera-Baquer Departmento de Química, Universidad de Las Palmas de Gran Canaria
  • Melchor González-Dávila Departmento de Química, Universidad de Las Palmas de Gran Canaria
  • J. Magdalena Santana-Casiano Departmento de Química, Universidad de Las Palmas de Gran Canaria

DOI:

https://doi.org/10.3989/scimar.2001.65s133

Keywords:

Langmuir isotherm, complexation, trace metals, complexing capacities

Abstract


The use of the Langmuir isotherm for the study of the complexing properties of functional groups present both in dissolved organic material and on biological surfaces in aquatic systems needs a heterogeneous model and an iterative linear regression solution. The method proposed previously by van den Berg is improved by replacing the expression used to obtain the complexing capacity and the conditional stability constant of the functional groups with stronger trace metal affinity, for the linear expression of the Langmuir isotherm proposed by Scatchard. The result is also an iterative linear regression process, which gives a convergent solution, together with better statistical weight distribution of the initial metallic titration data. It also fits better with the titration data obtained at very low dissolved metallic ion concentrations.

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Published

2001-07-30

How to Cite

1.
Laglera-Baquer LM, González-Dávila M, Santana-Casiano JM. Determination of metallic complexing capacities of the dissolved organic material in seawater. scimar [Internet]. 2001Jul.30 [cited 2023Jan.28];65(S1):33-40. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/676

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