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Reagent and method for rapidly measuring ammonia nitrogen content of oil refining sewage through electrode method

A technology for rapid determination and oil refining sewage, applied in the direction of electrochemical variables of materials, etc., can solve the problems of complex, measurement interference, etc., to achieve the effect of simple configuration, accurate results, and improved work efficiency

Inactive Publication Date: 2017-04-19
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The electrode method for the determination of ammonia nitrogen in water samples has the advantages of no need for pretreatment, less interference factors, and a wide detection range. It is an environmentally friendly, simple, fast, and highly accurate and precise ammonia nitrogen determination method. There are applications in monitoring, but there are few reports on the determination of ammonia nitrogen in refinery sewage by traditional electrode method, because the water quality of refinery sewage is complex and contains more metal ions, which will interfere with the determination

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  • Reagent and method for rapidly measuring ammonia nitrogen content of oil refining sewage through electrode method

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Embodiment 1

[0018] The reagent of the electrode method of this embodiment to quickly determine the content of ammonia nitrogen in oil refinery sewage is composed of a standard solution and a buffer solution. The standard solution is an ammonium chloride solution, and the mass percent concentration of ammonium chloride in the standard solution is 10.956 g / L The buffer solution is a mixed solution of sodium hydroxide, potassium sodium tartrate tetrahydrate, disodium ethylenediamine tetraacetate, and the mass percentage concentration of each component in the buffer solution is as follows: sodium hydroxide: 40 g / L; Potassium tartrate Sodium tetrahydrate: 28.2 g / L; disodium edetate: 7.44 g / L.

[0019] The process of using the above reagent and electrode method to measure the concentration of ammonia nitrogen in oil refinery sewage is as follows:

[0020] A: Put 2ml of buffer solution into 50ml of the water sample to be tested, and stir, measure the potential of the water sample to be tested wi...

Embodiment 2

[0026] The mass percent concentration of the ammonium chloride in the standard solution in this embodiment is still 10.956 g / L, and the difference from Example 1 is that in this embodiment, the mass percent concentration of each component in the buffer solution is as follows : Sodium hydroxide: 100 g / L; Potassium sodium tartrate tetrahydrate: 70.5 g / L; Disodium edetate: 18.6g / L.

[0027] The measurement method of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

Embodiment 3

[0029] The mass percent concentration of ammonium chloride in the standard solution in this embodiment is still 10.956 g / L, and the difference from Examples 1 and 2 is that in this embodiment, the mass percent of each component in the buffer solution The concentrations are as follows: sodium hydroxide: 200 g / L; potassium sodium tartrate tetrahydrate: 141 g / L; disodium edetate: 74.4 g / L.

[0030] The measurement method of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

[0031] The water samples to be tested in the above-mentioned three embodiments are all oil trap inlet water and aerobic pool O in a certain oil refinery. 1 For the same batch of water samples of effluent and secondary sedimentation tank effluent, the reagents and methods of the above three implementations were compared with the measurement results of the standard method "Determination of Ammonia Nitrogen Distillation-Neutralization Titration". The results are shown in Table...

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Abstract

The invention aims to provide a reagent and method for rapidly measuring the ammonia nitrogen content of oil refining sewage through an electrode method. The method is rapid and efficient, and the operation is quick and efficient. The reagent is composed of a standard solution and a buffer solution. The standard solution is an ammonium chloride solution. The buffer solution is a mixed solution of sodium hydroxide, sodium potassium tartrate tetrahydrate, and EDTA (Ethylene Diamine Tetraacetic Acid), wherein the mass percentage of sodium hydroxide: sodium potassium tartrate tetrahydrate: EDTA is 40-200: 28.2-141: 7.44-74.4. During the measuring process, sodium hydroxide in the buffer solution is used to adjust the pH value of a water sample until the pH value of the water sample reaches more than 11; sodium potassium tartrate tetrahydrate and EDTA can eliminate the interference of multiple metal ions such as aluminum, zinc, cadmium, copper, iron, and the like; and thus the reagent is very suitable for measuring the ammonia nitrogen content of oil refining sewage.

Description

technical field [0001] The invention belongs to the field of environmental monitoring, and relates to a reagent and a method for quickly measuring ammonia nitrogen content in oil refinery sewage by an electrode method. Background technique [0002] Petrochemical industry is the pillar industry of my country's national economic development and an important industry related to the national economy and people's livelihood. In the oil refining process, sewage containing ammonia nitrogen will be produced, and the ammonia nitrogen content should be measured when the sewage is treated. At present, national standard methods such as colorimetry or distillation titration are generally used for the determination of ammonia nitrogen in oil refining wastewater, which requires complicated treatment processes, requires more reagents and takes a long time to measure, and is easily affected by water quality components. In particular, the composition of petrochemical wastewater is complex, a...

Claims

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Application Information

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IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 王沛滋李德豪申屠灵女殷旭东伍治群李贵强王儒珍钟华文
Owner CHINA PETROLEUM & CHEM CORP
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