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859 Titrotherm

Computer-controlled titrator for thermometric titration. Including complete accessories for the titration (10 mL buret, titration stand with rod stirrer, Thermoprobe, titration vessel and tiamo™ light). Metrohm 859 Titrotherm is a USB-enabled thermometric titrator with one measuring input each for a Thermoprobe and a potentiometric sensor as well as four MSB connections for 800 Dosino® and stirrers. Titrotherm software, a Thermoprobe and a USB connecting cable for a PC are also included.


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Manual

Overview
859 Titrotherm complete with tiamo™

What is thermometric titration?
Titration is the oldest and most widespread method used in analytical chemistry. For a long time now, potentiometric sensors (indicator electrodes) have been used to cover a wide range of applications in the titration field. As a result, potentiometric titration has become an established analytical method and features many standards.

The electrochemical potential is only one of the possible ways of following a chemical reaction. A far more universal parameter is the reaction enthalpy.

Every chemical reaction is accompanied by a change in enthalpy (_H). As long as the reaction takes place, this results in either an increase (exothermal reaction) or decrease (endothermal reaction) in the temperature of the sample solution. For a simple reaction this means that the increase or reduction in temperature depends on the converted amount of substance.

Thermometric method advantages
  • Proven method
  • Problem solver for difficult samples that cannot be titrated potentiometrically
  • Rapid results
  • Robust method for routine work
  • Well suited for aggressive media

Thermometric sensor advantages
  • One sensor for all applications
  • Maintenance-free sensor
  • No membrane or diaphragm problems
  • No sensor calibration required
  • Well suited for aggressive media

Thermometric titration is a very versatile determination method, and it is an ideal complement to potentiometric titration. In principle it is suitable for any reaction that produces a sufficiently large temperature change in the sample solution. It is particularly suitable for applications:
  • for which no suitable potentiometric sensor is available
  • for which no suitable reference electrode is available
  • in which the sample affects the indicator electrode or destroys it
  • for which no solvent is available that is suitable for potentiometry

Typical applications of thermometric titration



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