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Method for measuring ammonia nitrogen in seawater

A measurement method, seawater technology, applied in the field of detection, can solve problems such as difficult ammonia nitrogen measurement, and achieve the effects of short time consumption, wide market space, and simple operation

Inactive Publication Date: 2014-10-01
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The problem to be solved by the present invention is that the existing polluted seawater is difficult to quickly measure ammonia nitrogen.

Method used

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  • Method for measuring ammonia nitrogen in seawater
  • Method for measuring ammonia nitrogen in seawater

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Experimental program
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Embodiment Construction

[0012] The present invention will be further described below in conjunction with embodiment.

[0013] 1, a kind of assay method of ammonia nitrogen in seawater is characterized in that:

[0014] A. Take seawater samples in the sea area that needs to be tested.

[0015] B. Use potassium sodium tartrate and polyvinyl alcohol to remove interfering impurities in seawater, use potassium sodium tartrate solution to mask calcium and magnesium ions in seawater, and use polyvinyl alcohol (PVA) colloid protection to make water samples in Clarified state, realizing the direct determination of ammonia nitrogen in seawater by Nessler's reagent method.

[0016] C. After adding the chromogenic agent and leaving it for different times, measure its absorbance value, and determine the best color development time according to the change of the absorbance value with time.

[0017] D. Relying on the existing Skalar san++ flow injection analyzer and based on the principle of Nessler's reagent col...

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Abstract

The invention discloses a method for measuring ammonia nitrogen in seawater, and belongs to the technical field of detection. The method comprises the steps of A, extracting a seawater sample from a sea area to be detected; B, removing interference impurities from the seawater through sodium potassium tartrate and polyvinyl alcohol together, covering calcium and magnesium ions in the seawater through a sodium potassium tartrate solution, enabling the water sample to be in a clarified state through a colloid protection effect of the polyvinyl alcohol (PVA), and directly measuring the ammonia nitrogen in the seawater through a Nessler's reagent method; C, adding a developing agent for different time periods, measuring an absorbency value of the developing agent, and determining the optima developing time according to the change of the absorbency value along with the time; D, implementing a method for quickly measuring the ammonia nitrogen in a polluted seawater system through the conventional Skalar san++ flow injection analyzer serving as a support based on the principle of a Nessler's reagent colorimetric method.

Description

technical field [0001] The invention relates to a method for measuring ammonia nitrogen in seawater, belonging to the technical field of detection. Background technique [0002] At present, the determination methods of ammonia nitrogen in water have been developed rapidly in recent years. However, for the polluted seawater, that is, the rapid determination of high-concentration ammonia nitrogen in the seawater system has not been well resolved, and it is an urgent problem to be solved. Contents of the invention [0003] The purpose of the invention is to provide a method for measuring ammonia nitrogen in seawater. [0004] The problem to be solved by the present invention is the shortcoming that it is difficult to quickly measure ammonia nitrogen in the existing polluted seawater. [0005] For realizing the purpose of the present invention, the technical scheme that the present invention adopts is: [0006] 1, a kind of assay method of ammonia nitrogen in seawater is ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 胡海燕
Owner ZHEJIANG OCEAN UNIV
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