A recent paper by Pavese et al. presents formulas for calculating the differences (T - T(90)) between temperatures measured on the internationally recognized temperature scale, ITS-90 and the thermodynamic temperature. However, there has been a systematic, international process in place to critically review the differences (T - T(90)) and to disseminate the results in a convenient form. The process was undertaken by Working Group 4 (WG4) at the request of the Consultative Committee for Thermometry. WG4 recently published the results of its review including consensus values of (T - T(90)) and a user-friendly, representation of (T - T(90)). One of the authors of the Pavese et al. paper is member of WG4. A multiplicity of representations of (T - T(90)) is an undesirable barrier to the exchange of thermodynamic information and obscures the status of temperature standards. Thus, WG4 recommends that the chemical thermodynamics community use the values (T - T(90)) and their polynomial representation as published in the WG4 paper. (C) 2011 Elsevier Ltd. All rights reserved.
