Authors: Davidge, Janette; Thomas, Christopher P.; Williams, David R.

Source: Chemical Speciation and Bioavailability, Volume 13, Number 4, November 2001 , pp. 129-134(6)

Publisher: Science Reviews 2000 Ltd

Abstract:

For decades conditional constants have been used by industry, in promotional literature and in patents, to assess the efficiency of a chelating agent in complexing a metal ion at a set pH. Speciation computer programs now permit the complete system to be modelled and to take into account interfering side reactions and variations in pH. This work compares conditional constant calculations with speciation modelling and shows that such modelling can produce a more efficient and accurate assessment of the power of a chelating agent.

Keywords: conditional constants; chemical speciation modelling; JESS program; chelating agent; S,S′-EDDS

Document Type: Research article

DOI: http://dx.doi.org/10.3184/095422901782775390

Affiliations: 1: Speciation Research Group, Chemistry Department, Cardiff University, PO Box 912, Cardiff CF10 3TB, UK

Publication date: 2001-11-10

More about this publication?

• Chemical Speciation & Bioavailability covers a rapidly expanding area in environmental science.

  Research on the interactions between the chemical forms and behaviour of toxic compounds and their subsequent biological uptake, metabolism and ecological fate involves many scientific fields. These studies are often published in discipline-specific journals, leading to inadequate review and information scatter. This situation hinders both the development of an international community of experienced colleagues and the open flow of information and discussion. Additionally, the importance of speciation and bioavailability research to the development of pollution law and control technologies is being increasingly appreciated by environmental regulatory agencies throughout the world.

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