Open Access

Erratum to: Humic acid potentiometric response patterns: out-of-equilibrium properties and species distribution modeling

Chemical and Biological Technologies in Agriculture20152:22

DOI: 10.1186/s40538-015-0046-0

Received: 6 October 2015

Accepted: 6 October 2015

Published: 17 December 2015

The original article was published in Chemical and Biological Technologies in Agriculture 2015 2:17

Erratum to: Chemical and Biological Technologies in Agriculture (2015) 2:17 DOI 10.1186/s40538-015-0042-4

After the publication of the original article [1], we noticed that Figs. 1–4 were ordered incorrectly and the figure captions did not correspond to the correct figures. The correct figure order and captions are provided below (Figs. 1, 2, 3, 4) and have also been updated in the original article. The publisher apologizes for any inconvenience caused.
Fig. 1

Potentiometric titration curve for humic acids and the calculated results for models M1 and M2 (calculated models were obtained with resulting error function σfit < 0.02)

Fig. 2

pH stabilization curves for three selected titration points. The values for parameters a, b, and c (Eq. 5) of all titration points were used in the construction of Fig. 4

Fig. 3

Species distribution diagram obtained using model M2. The components are represented by the following symbols: open circle carboxylic, open square phthalic, open triangle phenolic, closed triangle catechol, closed square salicylic, and open diamond supramolecular

Fig. 4

Out-of-equilibrium potentiometric response patterns for parameters b (bottom) and c (top) as functions of a (see Eq. 5). Color lines represent the triplicate results



This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver ( applies to the data made available in this article, unless otherwise stated.

Authors’ Affiliations

Departamento de Química, Universidade Federal de Santa Catarina
Départment des Sciences de la Terre et de l’Environnement, Université Libre de Bruxelles


  1. de Almeida VR, Szpoganicz B. Humic acid potentiometric response patterns: out-of-equilibrium properties and species distribution modeling. Chem Biol Technol Agric. 2015;2:17.View ArticleGoogle Scholar


© de Almeida and Szpoganicz. 2015