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20 Practical applications of thermometric titrationEach chemical reaction is associated with a change inenthalpy that causes a temperature change. The increase(exothermic reaction) or reduction (endothermic reaction)in temperature depends on the amount of substanceconverted.In a thermometric titration, reagent solution (titrant) is addedto the sample at a constant rate until the endpoint is reached. Thechanging temperature of the reaction solution is plotted versus thevolume of titrant added. The titration endpoint can be recognizedby a break in the titration curve and is exactly determined via thesecond derivative. Since the temperature sensor «Thermoprobe»has a response time of 0.3 s and a resolution of 10 -5 K, even smallenthalpy changes are reliably monitored.The most important advantages of thermometric titration are:• Problem solver for difficult samples that cannot be titratedpotentiometrically• Easy-to-learn and perform method fully supported in the tiamotitration software• Results are obtained very fast• One sensor for all applications• Maintenance-free sensor• No sensor calibration required• Robust method for routine work• No membrane or diaphragm problems• Well suited for aggressive mediaMetrohm’s application lab has been very busy developing newapplications for thermometric titration – we are proud to introduce anumber of new Application Bulletins. They can be downloaded freeof charge with the corresponding ready-to-use tiamo methodsfrom our website products.metrohm.com – simply enter the documentnumber of the Application Bulletin into the search field. The zipfile you download contains the Application Bulletin as a pdf file andthe tiamo methods.Application report