Measuring method used for measuring dissolved oxygen content in water by adopting three methods combined fluorescence method
A technology of dissolved oxygen content and measurement method, which is applied in the field of dissolved oxygen content measurement in water, can solve the problems of high maintenance cost and unstable measurement performance, and achieve the effect of less maintenance workload, rich interfaces and stable measurement results
Active Publication Date: 2012-06-13
SOUTHEAST UNIV +1
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Problems solved by technology
[0006] The problem solved by the technology of the present invention is: it can overcome the shortcomings of the existing membrane structure dissolved oxygen meter, such as high maintenance cost and unstable measurement performance.
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[0015] The technical solution of the present invention is: a method for measuring dissolved oxygen content in water using the fluorescence method of fusion of the three methods, comprising the following steps:
[0016] (1) In order to improve the detection accuracy of dissolved oxygen content in water, reduce the interference of external factors on the measurement of dissolved oxygen content in water, and reduce the later maintenance cost of instruments and meters using this method. This method uses the fluorescence method to measure the content of dissolved oxygen in water, which cuts off the actual contact between the measuring instrument and the measured substance. Compared with the traditional dissolved oxygen measurement method, this method does not need to be calibrated within one year, and the maintenance workload in the later period is less. Limited by the flow rate of the water body, the measurement results are stable.
[0017] (2) The method of measuring the dissolve...
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The invention discloses a measuring method used for measuring dissolved oxygen content in water by adopting three methods combined fluorescence method. Firstly, three methods, namely, measuring and exciting red light duration, exciting phase difference of red light and reference red light and exciting red light wavelength are adopted to measure the red light emitted by fluorescent substance excited by blue light, so as to obtain the existing dissolved oxygen content in the water respectively, then the two methods as exciting the phase difference of the red light and the reference red light and exciting the red light wavelength are adopted to serve as reference values for the data obtained through the method of measuring the exciting red light duration, measuring results of single methods are data combined, as a result, the optimum dissolved oxygen content in water is obtained at last. The invention combines the complementary advantages, so as to obtain the novel combined dissolved oxygen measuring method with higher precision and stability than any of the single measuring methods.
Description
Technical field: [0001] The invention relates to a method for measuring dissolved oxygen content in water, which can be used for water body quality detection, and can flexibly and accurately measure dissolved oxygen content in water. Background technique: [0002] As an important water quality index, dissolved oxygen plays an important role in both water quality evaluation and scientific research. How to determine the concentration of dissolved oxygen accurately, continuously and rapidly has always been an important topic in analytical chemistry. Therefore, the method of using chemical theory and means to detect dissolved oxygen first appeared in the field of chemistry, and such methods are called chemical methods. With the continuous development of other disciplines and technologies, the instrumental method derived from the combination of various disciplines has gradually become a hot spot in the field of dissolved oxygen concentration detection in recent years due to its ...
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IPC IPC(8): G01N21/64
Inventor 陈熙源徐元黄浩乾刘明初刘丙圣
Owner SOUTHEAST UNIV