1 Important Developments in the History of Ionic Liquids …
13
were prepared for shipping to the participants in the measurement program. Each
sample was handled inside a dry nitrogen glovebox where it was added to chemically
cleaned, hermetically sealed Schlenk tubes. Most of the 1 L sample was divided and
distributed to participants. NIST asked each participating laboratory to perform a Karl
Fischer titration for water as soon as they received it and to report this information
to Dr. Widegren. All samples were received intact with no water contamination due
to an airtight seal that was maintained during shipping.
Professor Marsh selected task coordinators in consultation with the full task group
and chair, and laboratories were selected to measure a specific property. Over several years, various measurements were conducted by the participating laboratories.
Participants e-mailed their data sets to their task coordinator. Coordinators handled
a report from a data owner as confidential information, and each was promptly forwarded to Dr. Robert (Rob) Chirico (NIST, Boulder, Thermodynamics Research
Center). During the data evaluation phase, only Dr. Chirico had access to the experimental measurements. Authors of the specific data sets were allowed to publish their
own studies at any time, and some chose to do so.
Dr. Chirico collected all data sets in an unpublished archive. Professor Marsh
et al. summarized them in a report published by IUPAC [74]. This report described
the experimental methods, results, and uncertainties for each data set. It surprised no
one that, with a large international effort, there were challenges. Probably the central
challenge was that each participating laboratory was overcommitted. That is to say,
they were already busy processing their own measurements, which took priority.
Since this work was not explicitly funded by the IUPAC Task Group, it was naturally
given a lower priority in the experimental queue for some participants. Lower priority meant that NIST had to hold up the data evaluation phase for about three years
until all samples were shipped. Another challenge was that the experimental results
were posted to files with very different formats that varied from a text table with
no ancillary description to a reprint of a published paper. Luckily, Dr. Chirico could
contact authors directly for the missing details, mostly related to standard uncertainties and experimental methods. Finally, all the experimental data and metadata
were collected. After all data sets had been submitted to Dr. Chirico, he then applied
an array of assessment tools described in a recent paper [75] to critically evaluate
the experimental data. Dr. Chirico et al. provided a final report and recommended
property values in Pure and Applied Chemistry (2009) [76].
1.5.2 IUPAC Project 2003-020-2-100 Ionic Liquids Database
Critically evaluated experimental data are essential to carry out innovative chemical process design or to improve material and energy efficiencies of existing
chemical processes. Developed under the auspices of IUPAC, ILThermo (https://
ilthermo.boulder.nist.gov/) is a data archive of experimental thermophysical properties (including 120 thermodynamic, transport, and thermochemical properties) of
13
were prepared for shipping to the participants in the measurement program. Each
sample was handled inside a dry nitrogen glovebox where it was added to chemically
cleaned, hermetically sealed Schlenk tubes. Most of the 1 L sample was divided and
distributed to participants. NIST asked each participating laboratory to perform a Karl
Fischer titration for water as soon as they received it and to report this information
to Dr. Widegren. All samples were received intact with no water contamination due
to an airtight seal that was maintained during shipping.
Professor Marsh selected task coordinators in consultation with the full task group
and chair, and laboratories were selected to measure a specific property. Over several years, various measurements were conducted by the participating laboratories.
Participants e-mailed their data sets to their task coordinator. Coordinators handled
a report from a data owner as confidential information, and each was promptly forwarded to Dr. Robert (Rob) Chirico (NIST, Boulder, Thermodynamics Research
Center). During the data evaluation phase, only Dr. Chirico had access to the experimental measurements. Authors of the specific data sets were allowed to publish their
own studies at any time, and some chose to do so.
Dr. Chirico collected all data sets in an unpublished archive. Professor Marsh
et al. summarized them in a report published by IUPAC [74]. This report described
the experimental methods, results, and uncertainties for each data set. It surprised no
one that, with a large international effort, there were challenges. Probably the central
challenge was that each participating laboratory was overcommitted. That is to say,
they were already busy processing their own measurements, which took priority.
Since this work was not explicitly funded by the IUPAC Task Group, it was naturally
given a lower priority in the experimental queue for some participants. Lower priority meant that NIST had to hold up the data evaluation phase for about three years
until all samples were shipped. Another challenge was that the experimental results
were posted to files with very different formats that varied from a text table with
no ancillary description to a reprint of a published paper. Luckily, Dr. Chirico could
contact authors directly for the missing details, mostly related to standard uncertainties and experimental methods. Finally, all the experimental data and metadata
were collected. After all data sets had been submitted to Dr. Chirico, he then applied
an array of assessment tools described in a recent paper [75] to critically evaluate
the experimental data. Dr. Chirico et al. provided a final report and recommended
property values in Pure and Applied Chemistry (2009) [76].
1.5.2 IUPAC Project 2003-020-2-100 Ionic Liquids Database
Critically evaluated experimental data are essential to carry out innovative chemical process design or to improve material and energy efficiencies of existing
chemical processes. Developed under the auspices of IUPAC, ILThermo (https://
ilthermo.boulder.nist.gov/) is a data archive of experimental thermophysical properties (including 120 thermodynamic, transport, and thermochemical properties) of