Apparatus for measuring ions in solution
First Claim
1. Electrochemical titration apparatus for measuring a constituent of a sample in solution and including coulometric generating means for generating ions combinable with the sample constituent and amperometric detecting means for detecting the presence of uncombined ions in said solution, each of said coulometric generating means and said amperometric detecting means including a respective pair of electrodes for contacting said sample in solution, the improvement comprising:
- means for enabling said coulometric generating means;
means for applying a predetermined potential difference between the amperometric detecting electrodes while simultaneously establishing an operating condition of substantially zero current flow at one of said amperometric detecting electrodes; and
means for monitoring flow of current between the other of said amperometric detecting electrodes and one of said coulometric generating electrodes.
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Accused Products
Abstract
Titration apparatus for measuring chloride electrolyte in blood samples including a pair of coulometric generating electrodes (anode and cathode) for titrating the chloride with silver ions to precipitate silver chloride and a pair of amperometric detecting electrodes for detecting uncombined silver ions following complete titration of the chloride and hence for signaling the endpoint of the chloride titration. A predetermined potential difference is applied across the amperometric electrodes, and an operating condition of zero current flow is established through one of the amperometric electrodes. Current flow between the amperometric electrode and the coulometric anode is monitored to indicate the presence of uncombined silver ions and thereby the titration endpoint.
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Citations
5 Claims
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1. Electrochemical titration apparatus for measuring a constituent of a sample in solution and including coulometric generating means for generating ions combinable with the sample constituent and amperometric detecting means for detecting the presence of uncombined ions in said solution, each of said coulometric generating means and said amperometric detecting means including a respective pair of electrodes for contacting said sample in solution, the improvement comprising:
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means for enabling said coulometric generating means; means for applying a predetermined potential difference between the amperometric detecting electrodes while simultaneously establishing an operating condition of substantially zero current flow at one of said amperometric detecting electrodes; and means for monitoring flow of current between the other of said amperometric detecting electrodes and one of said coulometric generating electrodes. - View Dependent Claims (2, 3, 4, 5)
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Specification