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A calibration method for the influence of suspended particulates measured by seawater chlorophyll sensors

A technology of suspended particulate matter and calibration method, which is applied in the field of calibration of the influence of suspended particulate matter measured by seawater chlorophyll sensors, and can solve problems such as narrow application range

Active Publication Date: 2019-07-09
SECOND INST OF OCEANOGRAPHY MNR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The technical problem to be solved by the present invention is to overcome the shortcoming of the existing chlorophyll sensor measurement that the calibration method for the influence of suspended particulates has a narrow application range, and provide a calibration method for the influence of suspended particulates based on the mechanism of the influence of suspended particulates on the measurement of algae live fluorescence, so that The same method can be applied to the calibration of suspended particulate matter in different concentration ranges

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  • A calibration method for the influence of suspended particulates measured by seawater chlorophyll sensors
  • A calibration method for the influence of suspended particulates measured by seawater chlorophyll sensors
  • A calibration method for the influence of suspended particulates measured by seawater chlorophyll sensors

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Embodiment 1

[0035] In order to calibrate the influence of suspended particulate matter on chlorophyll measurement, the material used to simulate turbidity must be close to the suspended particulate matter in the actual ocean environment, stable in properties, and able to be obtained and stored in large quantities. Fluorescence measurement experiments under different turbidity were carried out with various suspended particulate matter such as formazin solution, seawater filtered suspended particulate matter, and muddy surface sediment. The muddy marine surface sediments used in the present invention can be obtained using conventional surface sediment sampling equipment such as grab buckets, and generally the muddy sediment layers within 10 cm from the surface can be taken. In the experiment, samples from a large number of sea areas were taken respectively (in this embodiment, sea areas A, B, and C are selected as representatives, and the rest are similar), and each sample is divided into tw...

Embodiment 2

[0037] In the present embodiment, the American Seapoint chlorophyll sensor is used as an example (the fluorescent value of the chlorophyll sensor is a voltage value, and the unit is mV), and the method for calibrating the influence of suspended particles measured by the seawater chlorophyll sensor in the present invention is further described, specifically including the following steps:

[0038] (1) Place the chlorophyll sensor and turbidity sensor in a container filled with clear water, and record the initial fluorescence value Flu of the chlorophyll sensor A0 and the measured value Tu of the turbidity sensor A0 , adding the muddy marine surface sediments pretreated in Example 1 into the water body of the container in turn to form 10 suspended particulate matter concentration gradients, and record the fluorescence value of the chlorophyll sensor Fluorescence under each suspended particulate matter concentration gradient Ai and the measured value Tu of the turbidity sensor Ai...

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Abstract

The invention discloses a method for calibrating the influence of suspended particles on measurement of a seawater chlorophyll sensor, and belongs to the field of sensor correction. The fluorescence effect and shielding effect of suspended matters are fused in the same calibration formula on the basis of the change rule of the shielding effect of the suspended matters along with the concentration of an alga solution through an alga solution experiment, so that transition of the calibration method from theoretical analysis to actual application is promoted.

Description

technical field [0001] The invention belongs to the field of sensors, and in particular relates to a method for calibrating the influence of suspended particles measured by a seawater chlorophyll sensor. Background technique [0002] Chlorophyll is the main pigment in phytoplankton cells. The content of chlorophyll in seawater can directly reveal the number of phytoplankton and the level of primary productivity in the sea area. Therefore, chlorophyll plays an important role in marine ecological environment research such as predicting the outbreak of marine red tides and estimating the degree of eutrophication in seawater. At present, seawater chlorophyll has been listed as the main parameter of my country's marine survey and monitoring. [0003] Chlorophyll sensors based on the principle of in vivo fluorescence measurement can obtain the chlorophyll concentration in water in situ. These chlorophyll sensors are mounted on platforms such as multi-parameter water quality meters...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/6486G01N2201/127G01N2201/12746
Inventor 郑旻辉杨俊毅谢尚微叶陈军潘建明
Owner SECOND INST OF OCEANOGRAPHY MNR