Method and apparatus for measuring PH of solution
First Claim
1. A method of measuring a pH of a solution comprising:
- emitting light beams of two wavelengths from one side of a measuring region of a solution into which an indicator is mixed, while pulsating the solution in the measuring region;
receiving at least one of transmitted light beams and reflected light beams of the emitted light beams on the other side of the measuring region, while pulsating the solution in the measuring region;
obtaining absorbances of the two wavelengths based on variations of the received at least one of the transmitted light beams and the reflected light beams, the variations due to the pulsation of the solution in the measuring region;
obtaining an absorbance ratio from the obtained absorbances; and
calculating a pH value of the solution based on the obtained absorbance ratio and an absorbance ratio/pH value correspondence database which is previously stored.
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Accused Products
Abstract
A method of measuring a pH of a solution includes: emitting light beams of two wavelengths from one side of a measuring region of a solution into which an indicator is mixed, while pulsating the solution in the measuring region; receiving at least one of transmitted light beams and reflected light beams of the emitted light beams on the other side of the measuring region, while pulsating the solution in the measuring region; obtaining absorbances of the two wavelengths based on the received at least one of the transmitted light beams and the reflected light beams; obtaining an absorbance ratio from the obtained absorbances; and calculating a pH value of the solution based on the obtained absorbance ratio and an absorbance ratio/pH value correspondence database which is previously stored.
6 Citations
8 Claims
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1. A method of measuring a pH of a solution comprising:
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emitting light beams of two wavelengths from one side of a measuring region of a solution into which an indicator is mixed, while pulsating the solution in the measuring region; receiving at least one of transmitted light beams and reflected light beams of the emitted light beams on the other side of the measuring region, while pulsating the solution in the measuring region; obtaining absorbances of the two wavelengths based on variations of the received at least one of the transmitted light beams and the reflected light beams, the variations due to the pulsation of the solution in the measuring region; obtaining an absorbance ratio from the obtained absorbances; and calculating a pH value of the solution based on the obtained absorbance ratio and an absorbance ratio/pH value correspondence database which is previously stored. - View Dependent Claims (2)
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3. An apparatus for measuring a pH of a comprising:
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a light source configured to emit light beams of two wavelengths from one side of a measuring region of a solution into which an indicator is mixed; a light receiving sensor configured to receive at least one of transmitted light beams and reflected light beams of the emitted light beams on the other side of the measuring region; a pump configured to perform pulsation of the solution in the measuring region; and a CPU processing section configured to receive data from the light receiving sensor and to process the received data to; (i) obtain absorbance of the two wavelengths based on variations of the at least one of the transmitted light beams and the reflected light beams which are received by the light receiving sensor during the pulsation of the solution by the pump, the variations due to the pulsation of the solution in the measuring region; (ii) obtain an absorbance ratio from the obtained absorbances; and (iii) calculate a pH value of the solution based on the obtained absorbance ratio and an absorbance ratio/pH value correspondence database which is previously stored. - View Dependent Claims (4, 5, 6, 7, 8)
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Specification