Method and device for detecting chlorophyll of coastal zone water body in situ through double optical path method

A chlorophyll and coastal zone technology, applied in measurement devices, fluorescence/phosphorescence, material analysis by optical means, etc., can solve the problems of large volume and high cost, achieve small volume, long service life, and accurately monitor water chlorophyll concentration. Effect

Inactive Publication Date: 2016-05-04
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI +1
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Problems solved by technology

[0004] Most of the traditional chlorophyll analyzers are cabinet-type structures, which

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  • Method and device for detecting chlorophyll of coastal zone water body in situ through double optical path method
  • Method and device for detecting chlorophyll of coastal zone water body in situ through double optical path method
  • Method and device for detecting chlorophyll of coastal zone water body in situ through double optical path method

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Embodiment Construction

[0029] The invention detects the chlorophyll concentration by directly measuring the fluorescence intensity released by the stimulated chlorophyll in the water body, and mainly consists of four parts: a light source module, a measurement module, a reference module and a signal processing module.

[0030] Such as figure 1 As shown, the device of the present invention includes a signal processing module 1, a photodetector one 2, a focusing lens two 3, a light source 4, a photodetector two 5, a dichroic beam splitter 6, a focusing lens one 7, and a quartz light window 8. The casing 9, the casing 9 and the front main body 10 are sealed with double-layer silicone rubber rings, the light source 4 and the photodetector 2 5 are installed on the front main body with a fixing seat, the quartz light window 8 is located below the front main body 10, and the quartz light Below the window 8 is the water sample pool 11, and the focusing lens 1 7 is set above the quartz light window 8; the di...

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Abstract

The invention discloses a method and device for detecting chlorophyll of a coastal zone water body in situ through a double optical path method. According to the method, the concentration of chlorophyll alpha is detected on line on the basis of a fluorescence method detection principle by directly measuring the fluorescence intensity; the device is composed of a light source module, a measuring module, a reference module and a signal processing module. Under excitation of an LED light source, the intensity of fluorescence emitted by the chlorophyll is measured, and the chlorophyll concentration of the coastal zone water body to be detected is calculated through a linearly dependent coefficient calculated by a system model and a compensation value for correcting yellow matter CDOM. The device can quickly detect the concentration of the chlorophyll in the water body on site in real time in a large area and is small in weight and size, convenient to carry, high in accuracy and sensitivity, easy to operate, low in cost and capable of being applied to multiple detection fields.

Description

technical field [0001] The invention belongs to the technical field of in-situ detection of water environment optical methods, in particular to a method for in-situ monitoring of chlorophyll in coastal zone water by a double-light path method and a device for realizing the method. Background technique [0002] Chlorophyll exists in almost all phytoplankton and is one of the main indicators to estimate the content and distribution of phytoplankton and algae. The concentration of chlorophyll a can be used by monitoring stations and research institutions to understand and analyze the degree of eutrophication of water quality and the distribution of marine organisms, etc. It is also closely related to aquaculture and fishery, and is a routine testing item for testing water quality. [0003] At present, the main methods for measuring chlorophyll content in water bodies in my country include spectrophotometry, high performance liquid chromatography, and fluorescence methods. Both...

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Application Information

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IPC IPC(8): G01N21/64G01N21/01
CPCG01N21/6486G01N21/01G01N2021/0112G01N2201/062G01N2201/12761
Inventor 冯巍巍李丹蔡宗岐马正
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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