Member since: 2020
Great instrument compared to the competition. However, servicing cost is expensive.
Application Area: Oil lab
"Metrohm has a very quick TAN/TBN titrator. However, parts are very expensive. The instrument is very robust and easy to maintain."
Member since: 2019
Organization: Gnosys Global Limited (A Kinectrics Company)
Good investment and addition to our analytical facility
Application Area:Polymer, nanocomposites, composites, dielectric fluids
"The installation of the equipment is very simple and straight forward and requires low maintenance. The temperature control is very precise, and the system could be ready for sample analysis in very quick succession. Building a temperature method is very simple and the available brochures and manuals for guidance are properly described for the user. The equipment has a small footprint on the lab desk, which is admirable to accommodate in small space. I didn't like the display screen on the equipment. It is very dark and has no backlight for illumination. That should be improved. A proper keypad is also recommended to have in next version of the equipment. There is a plastic connector fitting for gas purging which should be replaced by metal connectors for better durability. On the first day the plastic connector fitting was broken at our site and we couldn't use the equipment for at least a month while waiting for the replacement. Another request to Metrohm would be to reduce the price of the sample vials to an affordable range as it is now very expensive."
Member since: 2011
Organization: Metrics, Inc.
"This unit has been very useful in the laboratory. The service from the vendor has been excellent. As with most new equipment, the ease of use can be directly related to training and involves a learning curve."
For various reasons many substances are not suitable for a direct Karl Fischer titration:
– They release their water only slowly
– The water is released at high temperatures only
– The substances are poorly soluble in alcohols
– They undergo side reactions with KF reagents
– They contaminate the titration cell or the electrodes
By using the KF oven method the above-mentioned problems can be avoided. The substance under investigation is heated in a hermetically sealed vial in the oven. The water vapor released is transferred to the titration cell by a carrier gas. This means that no noxious solubilizers have to be used, side reactions as well as matrix effects are absent and the contamination of the titration cell is avoided.
Depending on the sample’s water content, the determination can be carried out either by coulometric or volumetric Karl Fischer titration.