Product category:
Materials Testing
News Release from: Metrohm UK | Subject: 831 KF Coulometer, 832 KF Thermoprep
Edited by the Manufacturingtalk Editorial
Team on 01 August 2006
Titration to measure water content of
sweeteners
Cyclamate is a non-caloric sweetener being approximately 30 times as sweet as sucrose.
Cyclamate is a non-caloric sweetener being approximately 30 times as sweet as sucrose Cyclamate used in combination with other low-calorie sweeteners results in the synergistic effect of increased sweetness compared to the sum of the two individual sweeteners
This article was originally published on Manufacturingtalk on 22 May 2008 at 8.00am (UK)
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Process chemicals can be analysed on-line
Metrohm has combined the best aspects of laboratory and online systems to produce the 875 ProcessLab: a fully customised, automated at-line system for analytical testing.
Determining water levels in lubricating oils
It is impoirtant to determine the presence of water in machinery lubricating oils, which is why Metrohm is offering its 831 KF Coulometer to give reliable results over a long period.
Aspartame is a low-calorie sweetener being approximately 200 times as sweet as sucrose.
Aspartame is extremely unstable in the presence of moisture and undergoes hydrolytic degradation and subsequent loss of sweetness.
Hydrolytic degradation may be accelerated by elevated temperatures and is dependent on the pH value.
The heating method (oven method) together with Karl Fischer titration is used to determine the water content of tablets made of the artificial sweeteners aspartame and cyclamate.
As the tablets release their moisture only at high temperatures (aspartame: 130 C, cyclamate 140C) the direct Karl Fischer determination is not suitable.
The oven method of Karl Fischer titration is also perfect for samples having a low solubility in alcohols or samples containing interfering components (e.g vitamin C being present).
Metrohm's 832 KF Thermoprep is a very compact instrument containing the oven heating block, a gas pump, a flow meter, a flow controller and two drying flasks.
Single determinations can be carried out quickly and time as well as cost-saving.
Using a dry carrier gas, moisture is carried from the KF Thermoprep to the 831 KF Coulometer where the water is determined with a diaphragm-less generator electrode.
The KF Coulometer has established itself for the determination of very small amounts of water.
Besides its extremely compact design, the KF Coulometer fulfils every Karl Fischer analysis task.
The clear display provides information about the relevant titration parameters and gives an unmistakable presentation of the course of titration in the form of a curve showing ug water against time. Request a free brochure from Metrohm UK ...
Recommended measuring range: 10 ug_200 mg absolute water.
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