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Portable dissolved organic matter and nitrate nitrogen water quality analyzer and dissolved organic matter and nitrate nitrogen water quality analysis method

A dissolved organic matter and water quality analyzer technology, applied in the direction of analyzing materials, material analysis by optical means, instruments, etc., can solve the problem of high nitrate nitrogen concentration, and achieve the effect of good monochromaticity and rapid detection

Inactive Publication Date: 2020-12-29
NANJING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the dissolved organic matter in the water sample also has a strong absorption at 229nm, the measured nitrate nitrogen concentration will be seriously high

Method used

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  • Portable dissolved organic matter and nitrate nitrogen water quality analyzer and dissolved organic matter and nitrate nitrogen water quality analysis method
  • Portable dissolved organic matter and nitrate nitrogen water quality analyzer and dissolved organic matter and nitrate nitrogen water quality analysis method
  • Portable dissolved organic matter and nitrate nitrogen water quality analyzer and dissolved organic matter and nitrate nitrogen water quality analysis method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Such as figure 1 The portable dissolved organic matter and nitrate nitrogen water quality analyzer shown includes the upper part of the casing 1, the lower part of the casing 2, the shading cover 3, the button 4, the display screen 5, the circuit board 6, the charging interface 7, the battery 8, the cassette, and the optical detection Components, support plate 9 and fixed plate 10.

[0058] A square hole and a light-shielding cover 3 for opening and closing the square hole are arranged on the upper part 1 of the housing; the display screen 5 is fixed on the upper part 1 of the housing through a support plate 9, and the buttons 4 and the circuit board 6 are fixed on the upper part 1 of the housing by screws , the battery 8 is fixed on the lower part 2 of the shell through the fixing plate 10; the charging interface 7 is connected with the main circuit board 6.

[0059] figure 2 Schematic diagram for the installation of optical detection components, such as figure 2 ...

Embodiment 2

[0081] This embodiment is basically the same as Embodiment 1, the difference is:

[0082] Such as Figure 7 As shown, the second deep ultraviolet LED 17 and the first deep ultraviolet LED 18 are packaged in 3535nm ceramic chip packaging, the peak wavelength of the first deep ultraviolet LED 18 is 230nm, and the second deep ultraviolet LED The peak wavelength of the ultraviolet LED 17 is 280 nm.

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Abstract

The invention belongs to the field of environmental analysis and detection, and discloses a portable dissolved organic matter and nitrate nitrogen water quality analyzer and a dissolved organic matterand nitrate nitrogen water quality analysis method. The analyzer is characterized in that an optical detection assembly comprises a cuvette, a deep ultraviolet light source circuit board and an ultraviolet light intensity detection circuit board, a first deep ultraviolet LED with the wavelength of 275 + / -10 nm and a second deep ultraviolet LED with the wavelength of 235 + / -10 nm are arranged on the deep ultraviolet light source circuit board, the ultraviolet light intensity detection circuit board is provided with a first photodiode and a second photodiode, and the light source center of thefirst deep ultraviolet LED and the light source center of the second deep ultraviolet LED are opposite to the center of the first photodiode and the center of the second photodiode respectively. According to the portable dissolved organic matter and nitrate nitrogen water quality analyzer and the dissolved organic matter and nitrate nitrogen water quality analysis method, the chemical oxygen demand index and the total organic carbon index of soluble organic matter are predicted according to Abs275 + / -10, the nitrate nitrogen concentration is calculated according to Abs235 + / -10 and Abs275 + / -10, the interference of the organic matter is calibrated, and the detection accuracy is remarkably improved.

Description

technical field [0001] The invention belongs to the field of environmental analysis and detection, and in particular relates to a portable dissolved organic matter and nitrate nitrogen water quality analyzer and a method. Background technique [0002] Dissolved organic matter (DOM) is ubiquitous in various natural water bodies and sewage, and dissolved organic matter is the main indicator of chemical oxygen demand (Chemical Oxygen Demand, COD) and total organic carbon (Total Organic Carbon) indicators. contributor. Nitrogen is an important nutrient element that causes water eutrophication, and nitrate nitrogen is the main form of agricultural non-point source pollution and urban domestic sewage discharge. [0003] The methods for analyzing and detecting the concentration level of dissolved organic matter mainly include chemical method and spectroscopic method. Among them, the chemical method mainly includes the test of chemical oxygen demand and the test of total organic c...

Claims

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Application Information

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IPC IPC(8): G01N21/33G01N21/31
CPCG01N21/33G01N21/3151G01N2021/3129G01N2021/3181G01N2021/3188G01N2201/062G01N2201/126
Inventor 李文涛李爱民季闻翔韩玉泽申珊齐蔡珉晖李燕双陈冬周庆谢显传孟倩
Owner NANJING UNIV
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