Determination of water in organic solvents by flow-injection analysis with Karl Fischer reagent and a biamperometric detection system

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Liang, Chen and Vácha, Pavel and Linden, Willem E. van der (1988) Determination of water in organic solvents by flow-injection analysis with Karl Fischer reagent and a biamperometric detection system. Talanta, 35 (1). pp. 59-61. ISSN 0039-9140

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Abstract:A flow-injection system with a biamperometric flow-through detector provided with two platinum plate electrodes was tested for the determination of water with a two-component pyridine-free Karl Fischer reagent. The response was shown to be linear in the concentration range 0.03–0.11% water in methanol, ethanol or 2-propanol, with methanol as the carrier solvent. The maximum sampling frequency was about 150 samples per hr. It appeared to be possible to introduce a membrane separation step, thus allowing for the determination of water in fouled process streams. To avoid direct contact between the Karl Fischer solution and the pumping tubes, and thus extend the lifetime of the tubes, an indirect delivery system, based on replacement of the solution by pumped silicone oil, was also applied.
Item Type:Article
Copyright:© 1988 Elsevier Science
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Link to this item:http://purl.utwente.nl/publications/70283
Official URL:http://dx.doi.org/10.1016/0039-9140(88)80013-4
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