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Analyzer

A technology of analyzer and liquid container, which is applied in the field of analyzers for automatic determination of ammonia nitrogen content in liquid samples, can solve problems such as incomplete solutions, and achieve the effect of improving operation safety.

Inactive Publication Date: 2016-03-09
ENDRESS HAUSER CONDUCTA GESELLSCHAFT FUER MESS UND REGELTECHNIK MBH CO KG
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Problems solved by technology

[0012] All of these methods will alleviate the problems caused by the use of dichloroisocyanuric acid, but they do not completely solve the problems

Method used

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Embodiment Construction

[0051] figure 1 A schematic view showing an analyzer 1 for determining the ammonia nitrogen content of a liquid sample obtainable in sample 2, which includes several liquid containers 3, 4, 5, 6, and 7, with a plurality of liquid lines 8, 9 , 10, 11, 12 and 13 metering and injection devices, multiple pumps 14, 15, 16, 17, 18 and 19, such as diaphragm pumps, plunger pumps, especially syringe pumps, or hose pumps, and multiple Valve (not shown), used to transport liquid from the liquid container 3, 4, 5, 6 or sample supplier 2 into the measurement chamber 20 and / or discharge used liquid from the measurement chamber 20 to be used as waste Liquid container 7 of the container. As an alternative to multiple valves and multiple pumps, in an alternative embodiment the analyzer 1 includes a central valve system and / or one or more pumps for transporting liquid from liquid containers 3, 4, 5, and 6 to Inside the measuring room 20. The analyzer 1 also includes an optical measurement rece...

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Abstract

For an automated determination of a ammonia nitrogen content in a liquid sample, an analyzer and method are provided. The following steps are performed by the method: generating a reagent solution by electrolysis that contains hypochlorite ions to be added to the liquid sample, and feeding the reagent solution into the liquid sample; feeding at least one other reagent solution into the liquid sample and generating a reaction mixture from the reagent solutions and the liquid sample; sensing a measuring signal with a photometric measuring device that correlates with a measuring variable of the reaction mixture; and on the basis of the measuring signal, determining a measuring value for the ammonia nitrogen content with an electronic control device.

Description

Technical field [0001] The invention relates to an analyzer and a method for automatically determining the content of ammonia nitrogen in a liquid sample. Background technique [0002] Ammonia nitrogen (NH 4 The measurement of -N) content plays an important role in environmental measurement and method technology, especially in the cleaning and treatment of urban and industrial wastewater. The body of water contains nitrogen in elemental form and nitrogen-containing inorganic and organic compounds. Organically bound nitrogen usually exists in the form of protein, which can be degraded into inorganic nitrogen compounds by microorganisms. The inorganic nitrogen compounds in the water body are, for example, nitrate, nitrite, and ammonium. The ammonia nitrogen content in the water body is an important indicator of the impact of wastewater treatment plants and fertilizer residues. This parameter allows one to express the state of pollution and water quality. [0003] Municipal and in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N1/28C25B9/17
CPCG01N31/223G01N21/3577C25B1/26C25B9/17G01N31/002G01N21/77G01N21/59G01J1/42G01N2201/061
Inventor 乌尔里希·卡特
Owner ENDRESS HAUSER CONDUCTA GESELLSCHAFT FUER MESS UND REGELTECHNIK MBH CO KG
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