| 摘要 |
<p>A method and device for measuring the concentration of a substance in a fluid. The method specifically comprises: first passing a sample to be measured through a chemical sensor at least twice and recording the response value of each time; forming a simultaneous equation set using the equation relation between the response value obtained during each measurement by the chemical sensor and the concentration of the substance, and the mass equation relation satisfied by the concentration change caused by a physical, chemical reaction during each measurement and by the change of the mass, electric quantity, and heat; solving for the concentration of the substance measured and the sensor calibration parameter. The present method, used as an absolute measurement method, can be applied to calibrate the sample concentration of a gas or a liquid, overcomes the effects on the measurements caused by temperature, humidity, pressure, and some interfering gas, requires no sensor calibration, and substantially enhances the stability and reliability of measurements.</p> |
