https://doi.org/10.1351/goldbook.T06331
An analytical method in which one reactant (the
titrant
) is added continuously or stepwise to an
adiabatic
or isoperibol vessel containing another reactant. The
enthalpy
change(s) of the ensuing reaction(s) causes a temperature change which, when plotted versus volume of
titrant
, may be used to find the
titration
endpoint(s). This is the preferred term for experiments producing plots of temperature versus volume of
titrant
in which the main goal is a quantitative determination. Nonetheless, when a calorimetric vessel is used, such that the
heat capacity
is known, thermodynamic parameters may also be estimated from such experiments. An acceptable synonym in that case is enthalpimetric titration. The use of the adjective
thermometric
is justified because of widespread historical and current usage, and because a
titration
of necessity implies a chemical reaction. The term
thermometric enthalpy titration
has been used, but is not recommended. A method in which the
titrant
is a
catalyst
for an
indicator reaction
that occurs after the endpoint for the analyte reaction should be called a
thermometric
titration
with catalytic endpoint detection, not a
catalytic thermometric titration
.
Source:
PAC, 1994, 66, 2487. (Nomenclature of thermometric and enthalpimetric methods in chemical analysis (IUPAC Recommendations 1994)) on page 2490 [Terms] [Paper]