Metrohm 860 KF Thermoprep Karl Fischer Titration Sample Preparation Instrument

Metrohm 860 KF Thermoprep Karl Fischer Titration Sample Preparation Instrument

 ***Instrument was tested as far as we could.  Unit reaches desired set point temperature. Unit has slight wear from normal use. Buyer can expect a working machine with 30-day warranty. See photos for details.

The 860 KF Thermoprep is designed for thermal sample preparation in Karl Fischer titration. Numerous substances cannot be analysed by direct Karl Fischer titration as they are not soluble, react with the Karl Fischer reagent or release their water only very slowly or not until heated to high temperatures. Using tightly sealed sample vials, the sample is inserted in the oven. The samples can be subsequently analysed by any volumetric or coulometric KF titrator.

Simple, safe, precise. Thermal sample preparation in Karl Fischer titration.

The 860 KF Thermoprep is used wherever the heating of a sample and/or the thermal expulsion of moisture in solids or liquids is required. In combination with a coulometric or volumetric KF titrator, the 860 KF Thermoprep is the ideal analysis system for water content determination in samples that contain disruptive components or from which moisture can be
removed only with difficulty.

One of its decisive advantages is reducing sample preparation to a minimum. Thanks to the use of hermetically sealed sample vessels ("headspace vials"), samples can be filled directly on-site. The PTFE-coated septa guarantee a constant, unaltered water content, even after prolonged holding times.

The sample heated in the oven module releases its moisture in the form of water vapor, which is conveyed into a measuring cell with the aid of a gas flow. An air pump is installed to generate the gas flow. An inlet valve is available for nitrogen or other inert gases. The moisture can be determined in the measuring cell either coulometrically or volumetrically using Karl Fischer titration.

Instrument components
The 860 KF Thermoprep has the following components:

• Oven
  Oven module made of aluminum with software-operated temperature control for heating the sample vessel.
• Fan
  Propeller fan for cooling the oven module.
• Inlet valve
  Valve for switching over the source of the gas flow.
• Air pump
  Pump for generating the gas flow.
• Outlet heater
  Heating tubing for preventing the condensation of moisture.
• Support rods
  Guidance device with needle adapter and tubing for the gas flow.
• Operating unit
  Monochrome LCD display and keyboard.

Intended use
The 860 KF Thermoprep is designed for usage as an auxiliary device for sample preparation in analytical laboratories. Its main area of application is water content determination using Karl Fischer titration (coulometric or volumetric). The 860 KF Thermoprep enables the application of thermal gas extraction technology.

This instrument is suitable for processing chemicals and flammable samples. Therefore, the use of the 860 KF Thermoprep requires the user to have basic knowledge and experience in handling toxic and caustic substances. Knowledge regarding the application of fire prevention measures prescribed for laboratories is also mandatory.