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
.