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Method for measuring ammonia nitrogen in water body

A technology of ammonia nitrogen and water body, which is applied in the direction of measuring devices, material analysis by observing the influence of chemical indicators, instruments, etc., can solve the problems of low measurement accuracy and easy interference of ammonia nitrogen, and achieve the goal of improving measurement accuracy and eliminating interference Effect

Inactive Publication Date: 2018-06-22
SHANGHAI YIDIAN SCI INSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for measuring ammonia nitrogen in water for the above-mentioned existing method for measuring ammonia nitrogen in water is easily disturbed and has low measurement accuracy. Interference in the process improves measurement accuracy

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment

[0027] A method for testing ammonia nitrogen in river water, comprising the following steps:

[0028] a) Preparation method of reagent

[0029] In this example, the reagents used are analytically pure reagents that meet national standards.

[0030] (1) Preparation of experimental water

[0031] The water used for reagent preparation is ammonia-free water, which is prepared by the following method in an ammonia-free environment:

[0032] In 1000mL of distilled water, add 0.1mL of sulfuric acid of ρ=1.84g / mL, redistill in a full glass still, discard the first 50mL of distillate, and then collect 800mL of distillate in a glass with ground glass Add 10 g of strongly acidic cation exchange resin per liter of distillate in a glass bottle with a stopper.

[0033] (2) Preparation of ammonia nitrogen standard solution of ρ=1000mg / L

[0034] Weigh 3.8190g of ammonium chloride, dry at 100°C to 105°C for 2 hours, dissolve in water, transfer to a 1000mL volumetric flask, and dilute to ...

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Abstract

The invention provides a method for measuring ammonia nitrogen in a water body. According to the method, an ammonium ion selective electrode is used for measuring the content of ammonia nitrogen in awater body, and interference of other ions in an actual water sample in the measurement of ammonia nitrogen is eliminated, so measurement precision is improved.

Description

technical field [0001] The invention belongs to the technical field of material component analysis, and in particular relates to a method for measuring ammonia nitrogen in a water body. Background technique [0002] The sources of ammonia nitrogen in water are mainly the decomposition products of nitrogen-containing organic matter in domestic sewage under the action of microorganisms, some industrial wastewater and farmland drainage. A large amount of wastewater containing ammonia nitrogen is discharged into rivers and lakes, which will cause eutrophication of the water body, breed harmful aquatic organisms, and lead to fish death. Therefore, it is necessary to detect the ammonia nitrogen content in the water body quickly and easily. [0003] The determination methods of ammonia nitrogen mainly include colorimetric method, gas phase molecular absorption method, gas-sensitive ammonia electrode method, ion ammonium electrode method, etc. The colorimetric method is easy to ope...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N27/333
CPCG01N21/78G01N27/333
Inventor 吴建忠马丽
Owner SHANGHAI YIDIAN SCI INSTR