Metrohm has revealed that the 851 Titrando titrator can be used for low-level water detection in liquid, solid or gaseous samples.
The system includes :coulometer , generator electrode with diaphragm, touch control and 801 Stirrer.
The coulometric Karl Fischer titration is the method of choice for low-level water determinations (10ug-10mg absolute water content) in liquid, solid and gaseous samples.
As it is an absolute method, a titer determination is not necessary.
With the 851 Titrando coulometric titrations are carried out rapidly, including the additional analysis for: bromine index; automatic titration start; and automatic reagent exchange.
As a new feature, the 851 Titrando offers the possibility to determine the bromine index coulometrically.
The conventional titration cell, as well as the generator electrode with diaphragm, can also be used for this application.
Only the anolyte and the catholyte need to be changed.
With some titrators, automatic titration start can happen so fast that the sample is injected into the titration cell without pressing the start button first.
In this case, the water of the sample is conditioned away and the determination has to be repeated.
With the 851 Titrando this will not happen.
The instrument recognises the addition of sample and starts the determination automatically.
In this way, users save not only reagents but also sample and, above all, time.
Up to four Dosinos and dosing units can be attached to the MSB ports of the coulometer.
In combination with the 851 Titrando, these can be used for the addition of sample, water standard or auxiliary solutions such as solubilisers.
Furthermore, the reagent exchange can be automated, which means that the titration cell does not need to be opened and subsequently no humidity can enter the cell.
Long conditioning times after a reagent exchange can thus be avoided.
