A pH measurement method and pH measuring device of specimen solution - National University Corporation Kochi University

Title:

A pH measurement method and pH measuring device of specimen solution

Document Type and Number:

Japanese Patent JP6164753

Kind Code:

B2

Abstract:

Provided is a simplified, rigorous and accurate method of measuring pH of an analyte solution with extreme precision, which does not cause errors against actual pH through compensating a pH variation by a liquid temperature or a concentration of potassium chloride of an internal liquid in a glass electrode or a reference electrode when pH is measured with respect to various analyte solutions such as a sample solution having a high concentration of salts, a sample solution contaminated with salts and a sample solution having a low concentration of salts. A method of measuring pH of an analyte solution comprises: using electrodes, in which a pair of the electrodes consists of a glass electrode 10 which encloses a glass electrode internal liquid 12 including potassium chloride and a glass electrode buffer solution inside and a reference electrode 20 which encloses a reference electrode internal liquid 22 including potassium chloride and a reference electrode buffer solution inside such that a potential difference between the pair of the electrodes 10 and 20 is regulated to 0mV in a solution having out-of-range of pH 7.2 to 8.2, sensing a voltage generated between the electrodes in the analyte solution 50, and detecting a pH value of the analyte solution 50 while compensating pH by a concentration of the potassium chloride in the reference electrode internal liquid and a liquid temperature of the analyte solution 50.

Inventors:

Kei Okamura

Application Number:

JP2015069185A

Publication Date:

July 19, 2017

Filing Date:

March 30, 2015

Export Citation:

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