Integrated ion sensor

Abstract

The invention provides an integrated ion sensor which is characterized in that a working electrode assembly and a reference electrode assembly are arranged on the surface of a substrate, wherein, theworking electrode assembly comprises an ion-selective electrode (ISE) arranged on the surface of the substrate, a lead electrically connected with the ISE, and a blocking layer covering part of the ISE and lead; and the reference electrode assembly comprises a reference electrode arranged on the surface of the substrate, a lead electrically connected with the reference electrode, a blocking layercovering part of the lead, and an enclosing body arranged on the surface of the substrate, wherein, the enclosing body is provided with an exchanging interface for liquids to flow into the enclosing body and filled with electrolytes. By arranging the reference electrode and the working electrode on the same substrate at the same time, the integrated ion sensor becomes more user-friendly.

Description

technical field [0001] The invention relates to an ion sensor, in particular to an integrated ion sensor in which a working electrode and a reference electrode are arranged on a substrate to reduce space and facilitate operator use. Background technique [0002] Potentiometric analysis is a method of measuring the potential generated by the dissociated ions in the test solution to determine the ion concentration of the test solution to distinguish properties such as pH. The measurement of the potential needs two electrodes, one is the electrode that provides the reference for the measurement potential, which is generally called the reference electrode (or reference electrode). The stable potential measured by the instrument, commonly used reference electrodes are calomel electrodes and silver-silver chloride electrodes, but because the silver-silver chloride electrodes can be used in systems higher than 60 ° C, the use range is wider than that of calomel electrodes , and be...

AI Technical Summary

Problems solved by technology

[0008] However, these integrated ion sensors are a reference electrode. Although the advantages of reducing the volume of the reference electrode and being directly connected to the sensing box body 50, an additional working electrode must be used in the measurement, so the operation is inconvenient.

Furthermore, the space filled by the electrolyte solution 75 is only in the semicircular porous polymer protective layer 74, so the obtained value may not be accurate enough.

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