 Metrohm משיקה טיטרטור חדשני לטיטרציה.
Thermometric titration is a highly versatile titration method
because one sensor can be used for various kinds of applications.
The temperature sensors (Thermoprobes) are neither specific to
any ion type nor does their performance depend on the
electrochemical properties of the sample solution. They require
almost no maintenance and can be used immediately without any
conditioning.
Thermometric titration as a complement to potentiometry
Thermometric Titration can solve application problems that
potentiometry cannot or at least not with satisfying
reproducibility:
Free Fatty Acids (FFA) in edible oils or phosphate in fertilizers
can be determined even at low levels with high reproducibility
and without cross interference of other ions.
Etching acid mixtures containing phosphoric acid can be titrated
in aqueous media.
Two different analytes (e.g. sulfate and total acid) can be
determined in two consecutive titrations without changing the
sensor and sample solution.
In all cases the titration can be carried out without any special
sample preparation and the results are usually obtained very
fast.
Fast response of sensors
In a thermometric titration, reagent solution (titrant) is added
to the sample at a constant rate until the endpoint is reached.
The latter can be recognized by a break in the titration curve
obtained by plotting the amount of titrant added to the sample
versus the temperature. The second derivative of the temperature
curve yields the endpoint. Since the temperature sensor has a
response time of 0.3 s and a resolution of10?5 K, even small
enthalpy changes are reliably monitored.
With the 859 Titrotherm Metrohm offers a well proven system for
thermometric titration and provides applications for many
industries.
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