Method for measuring water body total nitrogen and total phosphorous by digestion spectrophotometry of ultraviolet cooperating with ozone

A technology of photometry and ultraviolet light, applied in the field of environmental chemical monitoring, can solve the problems of inability to detect in real time on site, long analysis duration, complicated analysis process, etc., and achieve rapid on-site detection, difficult marketing, and solve secondary pollution Effect

Inactive Publication Date: 2008-01-16
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology

[0004] The invention provides a method for measuring total nitrogen and total phosphorus in water body by ultraviolet light synergistic ozone digestion photometry, which can solve the existing problems of inability to detect in real time on site, long analysis duration, complicated analysis process, harsh conditions and high energy consumption , especially secondary pollution and other issues

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  • Method for measuring water body total nitrogen and total phosphorous by digestion spectrophotometry of ultraviolet cooperating with ozone
  • Method for measuring water body total nitrogen and total phosphorous by digestion spectrophotometry of ultraviolet cooperating with ozone

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Embodiment Construction

[0035] The inventive method carries out according to the following steps by detection device:

[0036] (1) utilize ozone generator 2 to produce the ozone solution of stable concentration, the concentration of ozone is 10mg / l, make ozone solution circulate ozone solution balance chamber 5 by peristaltic pump 8 under 10ml / min flow rate, ozone solution balance chamber 5 is equipped with The ozone solution dynamic balance tube 7 made of optical glass is provided with an ultraviolet lamp 6 on its side. When the ozone solution flows through the dynamic balance tube 7, the ozone solution is partially decomposed to produce hydroxyl radicals, hydroxyl radicals and Ozone can act together as an oxidizing agent to oxidize water samples. The cooling circulating water 4 in the ozone solution balance chamber 5 ensures the stability of the ozone concentration.

[0037](2) After the ozone solution flows through the ozone solution dynamic balance pipe 7, it is immediately mixed with the water ...

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Abstract

The invention provides an ultraviolet light and ozone coordinated luminosity counteraction method for measuring the total nitrogen and total phosphorus of water. The invention can solve the problem of the prior method that the real-time measuring can not be taken, the analyzing time is long, the analysis process is numerous and diverse, the measuring condition is harsh and the energy consumption is big, in particular that secondary pollution can be produced. Flow injection method and cavitations effect and ozone oxidation coordinated water sample counteraction method is adopted in the invention, the organic nitrogenous and inorganic nitrogen in the water sample are transformed into nitrate under the normal temperature and pressure, the phosphates of the water sample are transformed into normal phosphates; and lastly, the phosphates and the normal phosphates are measured by an ultraviolet visible light measuring system and the index of the total nitrogen and total phosphorus of water can be obtained.

Description

technical field [0001] The invention relates to the technical field of environmental chemical monitoring, in particular to a method for measuring water body total nitrogen and total phosphorus by ultraviolet light combined with ozone digestion photometry. Background technique [0002] Nitrogen and phosphorus are one of the essential elements for the growth of organisms. However, if the total nitrogen and total phosphorus content in the water body is too high, it will cause a large number of organisms and microorganisms to multiply, resulting in eutrophication of the water body, especially near seas, lakes, and reservoirs. Therefore, total nitrogen And total phosphorus is one of the important indicators to measure water quality. At present, the analysis methods of total nitrogen and total phosphorus in water bodies are basically still in the stage of laboratory analysis. The commonly used methods for the determination of total nitrogen include potassium persulfate oxidation-u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/00G01N21/33G01N21/78G01N21/01G01N33/18G01N1/44
Inventor 刘岩王军成侯广利白强孙继昌程岩任国兴
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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