CHEAQS Next is the next generation of the speciation program
CHEAQS Pro. The current version of CHEAQS Next is 2019.3, dated
24 September 2019.
The current plan is to stop development of the current 32-bit
version and to focus entirely on a new version which will only
run on 64-bit systems. A first version (still very incomplete)
is available for 'sneak preview'.
This version has five more amino acids added to the database so
ten in total.
This version has five amino acids added to the database. In
addition, a bug was fixed that caused adsorption to be skipped
when organic complexation was also included.
This version has DTPA added to the database. In addition, some
small bugs were fixed.
This version has citrate added to the database. In addition,
some errors in the database as well as some small bugs were
A fourth model for organic complexation was added, the one
developed by Cabaniss & Shuman (1988). Furthermore,
equilibrium definitions for gas-solution-equilibria can be
displayed. Also, a utility was added to delete user files in
case the program is uninstalled.
Two more titration types were added, including a real chemical
titration with volume change. Also, titration graphs can be
shown in log-mode.
A third titration type is added.
Pie graphs added as output option, log-values show during
output and some bug fixes.
Main new feature is the option to add items to the database
You can manipulate the database by removing or changing cations, ligands and species in an entirely new, easy-to-use interface (adding items to the database is foreseen for the near future).
In addition, CHEAQS Next remembers recent input and output files (if you like).
Convergence for high ionic strength samples was improved.
A bug causing a fresh installed program to hang was corrected.
Sorry for inconvenience.
Some features that are included in CHEAQS Pro are not yet implemented in CHEAQS Next, such as calibrations.
September 24, 2019: new version of database uploaded
containing five more amino acids.
July 9, 2019: new version of database uploaded
containing DTPA. citrate and five amino acids.
July 7, 2017: new version of program and manual updated.
June 11, 2017: list of references updated.
March 14, 2017: program updated as well as the manual.
March 1, 2016: the manual is updated to reflect latest
January 13, 2016: program version 2016.1 is available.
October 9, 2015: the updated manual is available! All
recently added features are described in this version.
September 19, 2015: updated manual is expected soon.
August 23, 2015: program version 2015.3 is available.
June 24, 2015: program version 2015.2 is available.
January 23, 2015: a chapter has been added to the manual
with chemical background information.
January 1, 2015: the first full-grown version of CHEAQS
Next was released. Beta-testing resulted in several changes.
October 16, 2014: a new chapter was added to the manual, containing four 'ín-depth'-topics:
May 21, 2014: chapters 1 and 2 of the manual are
finished (introduction and discussion of menu commands).
May 5, 2014: a fourth release is now available. All known issues are now resolved.
March 30, 2014: a second release is now available. Printing the output is now included and a different way of automatically keeping the program up to date.
January 19, 2014: the first release was prepared and
January 2, 2014: more pages were uploaded.
December 24, 2013: the templates for the website were completed and the first page was filled.
December 6, 2013: the domain name www.cheaqs.eu was
registered. This is the start of a cheaqs-site which is no
longer part of the telfort site.