Subcommittee on Solubility and Equilibrium Data

Description

The Subcommittee on Solubility and Equilibrium Data (SSED) coordinates projects in the area of compilation and critical evaluation of published experimental data on the chemical solubility of well defined substances and other equilibrium systems and coordinates the dissemination of evaluated solubility data through traditional (journal) and electronic (internet-accessible database) means. The SSED also organizes annual meetings of participants (SSED Meetings) to discuss progress on its various projects and biannual scientific conferences (International Symposia on Solubility Phenomena) to promote research in all areas related to solubility and other equilibrium phenomena.  The work of the SSED is carried out by several ongoing projects as described in the following paragraphs.

SSED MEMBERS:  Please check the member roster to the right (or at the bottom of this page when formatted for smaller screens) to make sure that your name is included.  If you find your name, click on it and check that your contact information is correct and up to date.  If your entry is missing, contact the Subcommittee Chair, Clara Magalhaes by email with a copy to the Subcommittee Secretary, Earle Waghorne.  If your contact information is incorrect, go to the IUPAC home page, click on Login and follow the instructions to update you information.

 

Solubility Data Series (SDS)

In the mid-1970s a group of chemists and chemical engineers came together within IUPAC to exhaustively compile and critically evaluate reports of experimental measurements of solubility primary chemical literature.  Beginning with Volume 1 covering the solubility of helium and neon in 1979 work has continued dealing with a wide array of solubilities of gases, liquids and solids in binary, ternary and higher order systems.  By 2017 a total of 104 volumes had been published and more are in preparation.  Volumes 1-65 were published as hard bound monographs, first by Pergamon Press (volumes 1–53) and later by Oxford University Press (volumes 54–65).  Starting with Volume 66 the series has been published by the Journal of Physical and Chemical Reference Data in cooperation with the US National Institute of Standards and Technology and is now formally known as the IUPAC-NIST Solubility Data Series.  For journal publication some volumes have been divided into parts bringing the total number of publications to 136.  A history of the early work on the SDS was prepared by Professor Larry Clever, one of the original participants (Chem Int 2004, 24(3), p. 12; doi:10.1515/ci.2004.26.3.12).  A guide to the preparation and use of the SDS (PAC 2010, 82(5), pp. 1137-1159; doi:10.1351/PAC-REP-09-10-33) and a glossary of solubility terms (PAC 2008, 80(2), pp. 233–276; doi:10.1351/pac200880020233) have been published.

 The goal of the SDS from the start was to compile all experimental solubility data in the world’s reviewed chemistry literature and to critically evaluate this body of data using international teams of experts under the auspices of IUPAC.  It was estimated that the effort would require the production of about 100 volumes each treating a chemically related group of systems.  In 2016 that estimate has been exceeded and the end is not yet in sight.  Some early volumes have already been revised and updated to include new experimental measurements and to incorporate new approaches to critical evaluation.

 Since the first volume of the SDS was published in 1979 great advances have occurred in the electronic storage and search for chemical property values including solubility.  While the SDS continues to be published on paper, all volumes are also accessible electronically.  The IUPAC-NIST Solubility Database provides search capability for selected systems and complete access to published volumes as PDF files.  Volumes 1-65 are available for download at no cost; later volumes require a fee.  At the time of this writing (late 2016) IUPAC is working to enhance and expand electronic access to the critically evaluated data of the SDS.

 The SDS is an ongoing work.  Expressions of interest from qualified individuals interested in volume preparation as well as questions about the series and its use should be directed to the Editor-in-Chief, Mark Salomon <[email protected]>.

 

Equilibrium Data Working Group

Stability constants, also known as equilibrium, formation, association, dissociation, protonation, ionization, complexation, instability (and doubtless other) constants, are quantities that define the extent of reaction of a system where reactants and products are in thermodynamic equilibrium. Unlike many physical properties, such as densities, stability constants in homogeneous solution are not measured directly but are typically calculated from analytical data using mass and (when appropriate) charge balance relationships. The derived nature of stability constants makes their evaluation difficult because each technique has its own foibles, uncertainties and (often-unrecognized) limitations, which may vary from system to system.

Stability constants form the basis of many analytical procedures and are often required for the development of new procedures and for predicting interferences. In addition, reliable values of stability constants for homogeneous equilibria are needed to inform computer-based chemical speciation modeling packages. Such packages are widely, and increasingly, employed to model the behavior of complex systems over wide ranges of concentrations, composition and temperature. The reliability (and usefulness) of such modeling is critically dependent upon the quality of the data on which it is based. Typical applications include the modeling of natural waters ranging from freshwater lakes to hyper-concentrated atmospheric aerosol particles. Speciation modeling is also used to improve understanding of human biochemistry and for industrial process monitoring and control.

IUPAC has been collecting stability constant data for homogeneous equilibria for almost 70 years. The early work in this area produced a monograph and several supplements, which aimed to be exhaustive compilations from the peer-reviewed chemical literature. Stability Constants of Metal-Ion Complexes, Edited by L. G. Sillén et al. [1] was followed by a number of supplements [2-9]. In 2003 most of the data collected were incorporated into an electronic database [10].

It has long been recognized that many researchers needing stability constant data had neither the time nor the expertize to distinguish among the numerous and often-conflicting reported values. To meet this need, which still exists, the then IUPAC Commission V.6 on Equilibrium Data decided to undertake a critical evaluation of the existing data. Given the daunting magnitude of such a task, it was divided into smaller parts and volunteer experts were sought to do the work. To the present this effort has produced 27 publications [11-37] providing critical evaluations of various selected groups of stability constants. Of these 27 publications, four [11-14] were published as monographs in the IUPAC Chemical Data Series and the remaining 23 as Technical Reports in Pure and Applied Chemistry [15-37].
Publications of compilations and critical evaluations of stability constant data

For further information contact: Glenn Hefter <[email protected]>

 

International Symposia on Solubility Phenomena (ISSP)

Since 1984 the SSED (and before 2002 its predecessor the Solubility Data Commission, V.8) have organized international meetings under IUPAC sponsorship.  In the IUPAC tradition these symposia have included plenary and invited lectures, contributed papers, poster sessions and opportunities for informal communication among participants.  In addition workshops on various technical and pedagogical topics have been held and meetings of the SSED traditionally  are held in conjunction with ISSP in even numbered years.  Under the SSED the scope of the symposia has been broadened to include a range of equilibrium-related topics.  The dates and venues of ISSP are given below:

1st   1984 London, Ontario, Canada
2nd   1986 Newark, New Jersey, USA
3rd   1988 Guilford, UK
4th   1990 Troy, New York, USA
5th   1992 Moscow, Russia
6th   1994 Buenos Aires, Argentina
7th   1996 Leoben, Austria
8th   1998 Niigata, Japan
9th   2000 Hammamet, Tunisia
10th  2002 Varna, Bulgaria
11th  2004 Aveiro, Portugal
12th  2006 Freiberg, Germany
13th  2008 Dublin, Ireland
14th  2010 Leoben, Austria
15th  2012 Xining, China
16th  2014 Karlsruhe, Germany
17th  2016 Geneva, Switzerland
18th  2018 Tours, France
19th  2020 Albuquerque, New Mexico, USA – Rescheduled Virtual 12-16 July 2021
20th  2022 Bragança, Portugal, 4-9 Sep 2022

 

Franzosini Award

The Franzosini Award was established by the former Solubility Data Commission (V.8), in 1988, during its 14th annual meeting held in Guildford, Surrey, United Kingdom, in conjunction with the third International Symposium on Solubility Phenomena (ISSP) that was hosted by A.F. Danil de Namor. The “Paolo Franzosini Endowment Fund” was created in 1988 under the proposal of A. S. Kertes, from the generous donation of Franzosini’s wife and daughter after the sudden death, on the 24th January 1985, of Paolo Franzosini, Professor of Physical Chemistry at the University of Pavia (Italy) while completing the volume 33 of the Solubility Data Series on Molten Alkali Metal Alkanoates. The volume, finished with the help of his colleagues, Paolo Ferloni, Alberto Schiraldi and Giorgio Spinolo, was published in 1988 by Pergamon Press. The family generously offered all fees and honoria associated with the volume for the establishment of the Franzosini Fund. A simple trust fund was established by Anders Björkman (then treasurer of IUPAC), and approved by the IUPAC Bureau as well as by the Commission on Solubility Data (IUPAC Commission V.8) chaired by John Lorimer. Under the terms of the trust the capital is held by IUPAC, the accounting is done by the IUPAC secretariat, and the income derived from the Fund is used exclusively for the activities of the Commission on Solubility Data of the Analytical Chemistry Division; the Chair of the Commission decides the precise use of the money.

The Solubility Data Commission established the Franzosini Award to be given to assist a promising young contributor to the Solubility Data Project to attend, in even years, the ISSP meetings, and in odd years the annual meeting of the Solubility Data Commission. Between 1989 and 2016 there have been twenty two the recipients of this prize often leading to new collaborations many of which are still active in preparation of volumes of the Solubility Data Series. During the SSED meeting of 2008 it was decided that a maximum of two prizes could be given only in the even years, when the SSED meeting and the ISSP meet together.  The recipients of the Franzosini Award as well as the year, the venue, and the name of the proponent have been compiled – see details

 

Current Projects

Meeting Minutes

18th Annual Meeting of the SSED was held in Paris, France in conjunction with the IUPAC General Assembly on 9 July 2019.

17th Annual Meeting of the SSED held in conjunction with the 18th International Symposium on Solubility Phenomena held in Tour, France, 15 July 2018 (full text, pdf-1.4MB).

16th Annual Meeting of the SSED was held in Graz, Austria in conjunction with the European Conference on Thermophysical Properties on 2 September 2017 (full text, pdf-5MB).

15th Annual Meeting of the SSED held in conjunction with the 17th International Symposium on Solubility Phenomena held in Geneva Switzerland, 24 July 2016 (full text, pdf-1.4MB).

14th Annual Meeting of the SSED held in conjunction with the 30th International Conference on Solution Chemistry in Prague, Czech Republic, 30 August 2015 (Full text, pdf-2.1MB)

13th Annual Meeting of the SSED held in conjunction with the 16th International Symposium on Solubility Phenomena at Karlsruhe, Germany, 20 July 2014 (full text, pdf-113KB)

12th Annual Meeting of the SSED held in conjunction with the 47th General Assembly held in Istanbul, Turkey 11 August 2013 [ full text, pdf file-664KB]

11th Annual Meeting of the SSED held in conjunction with the 15th International Symposium on Solubility Phenomena at Xining, China
21-22 July 2012 [full text, pdf file -1.8MB]

10th Annual Meeting of the SSED held in conjunction with the 32nd International Conference on Solution Chemistry at la Grande-Motte, France
2 September 2011 [full text, pdf file -506KB]

9th Annual Meeting of the SSED held in conjunction with the 14th International Symposium on Solubility Phenomena at Leoben, Austria
24-25 July 2010 [full text, pdf file -1.6MB]

8th Annual Meeting of the SSED held in conjunction with the 31st International Conference on Solution Chemistry at Innsbruck, Austria
26 August 2009 [full text, pdf file -1.5MB]

7th Annual Meeting of the SSED held in conjunction with the 13th International Symposium on Solubility Phenomena at Dublin, Ireland
26-27 July 2008 [full text, pdf file -936KB]

6th Annual Meeting of SSED held in conjunction with the 44th IUPAC General Assembly at Torino, Italy
6 August 2007 [full text, pdf file – 861KB]

5th Annual Meeting of SSED held in conjunction with the 12th International Symposium on Solubility Phenomena at Freiberg, Germany
22-23 July 2006 [ full text, pdf file – 199KB]

4th Annual Meeting of SSED held in conjunction with the 29th International Conference on Solution Chemistry at Portoroz, Slovenia
26 August 2005 [full text, pdf file – 183KB]

3rd Annual Meeting of SSED held in conjunction 11th International Symposium on Solubility Phenomena at Aveiro, Portugal
24-25 July 2004 [full text, pdf file – 498KB]

2nd Annual Meeting of SSED held in conjunction with the 42nd IUPAC General Assembly at Ottawa, Canada
11-12 August 2003 [full text, pdf file – 73KB]

1st Annual Meeting of SSED held in conjunction with the 10th ISSP, Varna, Bulgaria
July 2002 [full text, pdf file – 378KB]

Minutes of  Commission V.8 Meeting, during the 41st IUPAC General Assembly at Brisbane, Australia July 2001 [full text, pdf file – 143KB]  (Prior to a reorganization of IUPAC in 2001 the Commission on Solubility Data (V.8) preceded the SSED.)

Minutes of  Commission V.8 Meeting, held in conjunction with the 9th ISSP, Hammamet, Tunisia July 2000 [full text, pdf file – 1MB]

Minutes of  Commission V.8 Meeting, during the 40th IUPAC General Assembly at Berlin, Germany August 1999 [full text, pdf file – 971KB]

Minutes of  Commission V.8 Meeting, held in conjunction with the 8th ISSP, Niigata, Japan August 1998 [full text, pdf file – 2.5MB]

Minutes of  Commission V.8 Meeting, during the 39th IUPAC General Assembly at Guildford, UK August 1995 [full text, pdf file – 992KB]

Minutes of  Commission V.8 Meeting, held in conjunction with the 7th ISSP, Buenos Aires, Argentina August 1994 [full text, pdf file – 596KB]

Minutes of  Commission V.8 Meeting, Lisbon, during the 38th IUPAC General Assembly at Portugal August 1993 [full text, pdf file – 590KB]

Minutes of  Commission V.8 Meeting, held in conjunction with the 6th ISSP, Moscow, Russia July 1992 [full text, pdf file – 579KB]

Minutes of  Commission V.8 Meeting, during the 37th IUPAC General Assembly at Hamburg August 1991 [full text, pdf file – 515KB]

Minutes of  Commission V.8 Meeting, held in conjunction with the 5th ISSP, Troy, NY, USA July 1990 [full text, pdf file – 276KB]

Minutes of  Commission V.8 Meeting, during the 36th IUPAC General Assembly at Lund, Sweden August 1989 [full text, pdf file – 563KB]

Minutes of  Commission V.8 Meeting, held in conjunction with the 4th ISSP, Guildford, UK August 1988 [full text, pdf file – 376KB]

Minutes of  Commission V.8 Meeting, during the 37th IUPAC General Assembly at Lyon, France August 1985 [full text, pdf file -432KB]

Page last updated: 10 May 2022