Automated sample preparation for Titrino Coulometers

If you are dealing with high numbers of samples that cannot be directly titrated volumetrically or coulometrically, then you have the possibility to automate thermal sample preparation with an oven sample changer from Metrohm.

Save valuable time and increase the precision and comparability of your results by automating sample preparation and titration.

KF Titrino Coulometer

Key features

  • Save time by eliminating manual work steps
  • Rely on a high level of accuracy thanks to heated transfer tubing.
  • Benefit from more functionality through software control.
  • Use your own sample vials with a customized system.

Simple and clean solution for difficult samples

The oven method enables you to analyze samples that cannot be titrated directly.

This might be the case for various reasons, e.g., because your sample:

  • does not dissolve easily,
  • releases the water only at high temperatures, or
  • reacts with the KF reagent.
The oven method involves heating the samples and transferring the evaporated water to the titration cell by means of a dry carrier gas. As only the water gets in contact with the KF reagent, the electrode and the titration cell are not contaminated, and carryover or memory effects that could distort the results are excluded.
Oven method to extract water from difficult samples for Karl Fischer titration

More precision in less time

With an oven sample changer from Metrohm, you can save valuable time – and obtain better results.

The sample is contained in sealed vials, meaning that the water content remains unchanged. In addition, the sample changers have a heated transfer tube. Condensation in the tube is therefore excluded while the water is being transferred to the titration vessel.

Time savings through automation

Space-saving, stand-alone, simple: 885 Compact Oven Sample Changer

With a very small footprint and an integrated control panel for stand-alone operation, the 885 Compact Oven Sample Changer encapsulates convenience and easy operation. The only parameters that you have to define are the oven temperature and the gas flow.
Compact oven sample changer to extract the moisture in samples for Karl Fischer titration

Clever and customizable: 874 USB Oven Sample Processor

The 874 USB Oven Sample Processor is the right instrument if you are looking for more flexibility and functionality.

Together with the titrator, it is controlled with the tiamo software. This allows you to work out the optimum heating temperature of an unknown sample by recording a heating curve. As an option, you can also automate reagent exchange and thus avoid having to open the titration cell and possible exposure to the toxic reagent.

You would like to use your own sample vessels? We would be happy to provide you with a customized oven.
Oven sample processor to extract water from samples and coulometer for water content determination