Product category:
Titration equipment
News Release from: Metrohm UK | Subject: Metrohm's 831 KF Coulometer
Edited by the Laboratorytalk Editorial
Team on 16 August 2007
New method determines water content in
gases
Metrohm has developed a method to determine the moisture content of their gases based on the ISO standard 10101: Natural gas: Determination of water by the Karl Fischer method
Many organisations would like to determine the moisture content of their gases The reproducible determination of the water content is tricky as many gases usually only contain a few ug/l water
This article was originally published on Laboratorytalk on 2 Jul 2008 at 8.00am (UK)
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The problem is not the coulometric measurement itself, but the sample introduction.
An optimal measuring setup and the exact determination of the gas volume are the be-all and end-all of water determination in the lower ppm range.
In order to ensure a reproducible gas introduction time, the control of the valves should be automated.
The tiamo titration software is also suitable for this purpose: by using a relay box, the valves can be opened and closed according to the conditioning or determination status of the coulometer.
In addition, the duration of the gas introduction is documented and can be used for calculating the gas volume.
The gas to be analysed is passed through the Karl Fischer titration cell in which the water is absorbed by the KF reagent and then determined using Metrohm's 831 KF Coulometer.
In addition to natural gas, the Metrohm method can also be used for other gases (for example nitrogen) that do not react with the Karl Fischer reagent. Request a free brochure from Metrohm UK ...
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