Product category:
Humidity and moisture sensing systems
News Release from: Metrohm UK | Subject: 832 Thermoprep
Edited by the Processingtalk Editorial
Team on 18 February 2004
Low cost moisture content determination
If there is moisture in a sample, Metrohm will find it with the 832 Thermoprep: using a Karl Fischer oven only the water content of the sample is transferred to the titration cell
If there is moisture in a sample, Metrohm will find it with the 832 Thermoprep The water content of many samples is difficult to determine because they are only slightly soluble in alcohols, contaminate the titration cell or have side reactions with Karl Fischer reagents
This article was originally published on Processingtalk on 25 Sep 2003 at 8.00am (UK)
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Traditional methods recommend the use of toxic solvents to promote dissolution of the sample or alternatively the samples require extensive sample preparation procedures.
A more elegant solution is achieved by using a Karl Fischer oven, as with this technique only the water content of the sample is transferred to the titration cell.
However, instead of introducing the sample into the oven by means of a sample boat, the vial technique is used, i.e the sample is weighed directly into the sample vial, sealed and transferred to the oven.
Combined with the sophisticated methodology of the 832 KF Thermoprep, this results in several improvements in the analysis.
Strictly reproducible analysis conditions yield results with markedly improved precision.
Manual sample preparation is reduced to a minimum.
Considerable time savings are made.
There is no contamination of the oven or the titration cell.
No carry over or memory effects.
Reagent consumption is greatly reduced.
Water released in the carrier gas is improved as the sample actually passes through the sample directly.
Low levels of moisture are determined in the trace regions coulometrically or in the % levels volumetrically. Request a free brochure from Metrohm UK ...
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