Dissolved oxygen sensitive film light sensing device and fluorescence efficiency detection system

Abstract

The invention relates to a dissolved oxygen sensitive film light sensing device and a fluorescence efficiency detection system; the dissolved oxygen sensitive film light sensing device comprises a light sensing seat; a water inlet and a water outlet are arranged on the light sensing seat, and dissolved oxygen circulating water fills in the light sensing seat; the device also includes: a transparent window that is arranged on the side wall of the light sensing seat, and a light source enters the light sensing seat from the transparent window; and a dissolved oxygen sensitive film that is arranged in the transparent window and is used for receiving the stimulation of the light source and generating excitation fluorescence. The dissolved oxygen concentration state can be accurately adjusted through the dissolved oxygen sensitive film light sensing device, and fluorescence efficiency detection can be achieved; the fluorescence emission efficiency, the optimal excitation wavelength, the maximum emission fluorescence wavelength and the fluorescence lifetime can be obtained through analysis, the light utilization rate is increased, and bleaching of the dissolved oxygen sensitive film is reduced.

Description

technical field [0001] The invention relates to the field of physical optics, in particular to a dissolved oxygen sensitive film photosensitive device and a fluorescence efficiency detection system. Background technique [0002] Fluorescence detection of dissolved oxygen concentration has the advantages of no need for electrolyte, no interference, and no need for frequent calibration; moreover, it does not consume oxygen and has no flow rate limitation, making this detection method a trend. Most scholars generally choose blue light as the excitation light, but some scholars have found in related research that the fluorescence effect produced by green light is better, which shows that different oxygen-sensitive materials correspond to different optimal excitation light wavelengths. [0003] Most studies on the characteristics of oxygen-sensitive membranes focus on salinity, temperature, pressure, pH, or the concentration of fluorescent indicators in oxygen-sensitive membranes...

AI Technical Summary

Problems solved by technology

For the excitation light with low efficiency, in order to produce the expected fluorescence, the intensity of the excitation light must be increased, but if the intensity of the excitation light is too strong, it will cause bleaching of the oxygen-sensitive indicator, which will affect the service life of the oxygen-sensitive membrane

In the prior art, to select the excitation light wavelength, several luminous light sources with different wavelengths are often used, or a fluorescence spectrophotometer is used for detection, it is difficult to adjust the oxygen concentration in water, the operation is cumbersome and complicated, and the optimal wavelength may be missed

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