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Scientific article
Open access
English

Quantification of refractory organic substances in freshwaters: further insight into the response of the voltammetric method

Published inAnalytical & bioanalytical chemistry, vol. 392, no. 6, p. 1225-1230
Collection
  • Open Access - Licence nationale Springer
Publication date2008
Abstract

A recently published method for quantifying refractory organic matter (often referred to as humic substances) in freshwaters was applied to a wide range of International Humic Substance Society (IHSS) humic compounds in order to (i) gain a better understanding of the mechanism of the voltammetric response which is the basis of the analytical method and (ii) provide guidance on choosing the optimal standard to be used. At the same time, the sensitivity of the technique has been increased by switching from the pulse mode initially proposed to the square-wave mode. The results obtained show that (i) differences in adsorption onto the electrode rather than differences in complexation strength are responsible for the differences in the intensity of the signal obtained for the different humic compounds, (ii) carboxylate, N- and S-containing groups do not play a role in the voltammetric signal.

Keywords
  • Humics
  • Fulvics
  • Refractory organic matter
  • IHSS
  • SWV
  • Mo(VI)
  • Freshwaters
Citation (ISO format)
QUENTEL, François, FILELLA, Montserrat. Quantification of refractory organic substances in freshwaters: further insight into the response of the voltammetric method. In: Analytical & bioanalytical chemistry, 2008, vol. 392, n° 6, p. 1225–1230. doi: 10.1007/s00216-008-2366-4
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Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal1618-2642
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