Method and device for calibrating an analyzer for measuring low ion activity values in a sample stream

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United States of America Patent

PATENT NO 4625543
SERIAL NO

06753460

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Abstract

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A sample stream is conditioned by the addition of reagents and the ion concentration is measured by means of a measuring system which can be connected to an arrangement for releasing an appropriate calibrating substance. The calibrating substance used is a soluble glass for the defined release of a known quantity of the ions to be measured, and the reference concentration is established directly in the sample stream. There is therefore no need for a calibrating solution or a metering pump for the latter, and disturbances due to the undesired transfer of impurities and reactive ions are avoided. The method is particularly suitable for the analysis of Na.sup.+, the soluble glass being a sodium polyphosphate glass.

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Patent Owner(s)

Patent OwnerAddress
ZELLWEGER USTER LTDUSTER

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ertl, Stefan Hombrechtikon, CH 5 22
Jola, Martin Hombrechtikon, CH 1 5

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