UNIGE document Scientific Article
previous document  unige:79047  next document
add to browser collection
Title

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

Authors
Quentel, François
Published in Analytical and Bioanalytical Chemistry. 2008, vol. 392, no. 6, p. 1225-1230
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 HumicsFulvicsRefractory organic matterIHSSSWVMo(VI)Freshwaters
Identifiers
Full text
Article (Published version) (155 Kb) - document accessible for UNIGE members only Limited access to UNIGE
Other version: http://link.springer.com/10.1007/s00216-008-2366-4
Structures
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 and Bioanalytical Chemistry, 2008, vol. 392, n° 6, p. 1225-1230. https://archive-ouverte.unige.ch/unige:79047

92 hits

0 download

Update

Deposited on : 2016-01-11

Export document
Format :
Citation style :