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Automatic analyzer for determining ammonia nitrogen in water and automatic analytic method thereof

A technology of automatic analyzer and automatic analyzer, which is applied in the direction of material analysis by observing the influence of chemical indicators, analysis by making materials undergo chemical reactions, instruments, etc., can solve the problems of many interferences and cumbersome operations, Achieve the effect of good repeatability, high sensitivity and fast test speed

Inactive Publication Date: 2012-03-14
BEIJING JITIAN INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the manual analysis method is mostly used for the determination of ammonia nitrogen, which has a lot of interference and requires distillation pretreatment, which is cumbersome to operate.

Method used

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  • Automatic analyzer for determining ammonia nitrogen in water and automatic analytic method thereof
  • Automatic analyzer for determining ammonia nitrogen in water and automatic analytic method thereof
  • Automatic analyzer for determining ammonia nitrogen in water and automatic analytic method thereof

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Embodiment Construction

[0026] The present invention will be further described below through specific embodiments.

[0027] The structure of the automatic analyzer of ammonia nitrogen in water of the present invention

[0028] Such as figure 1 The automatic analyzer of ammonia nitrogen in water shown, the automatic sampling device 1, the peristaltic pump pump tube 12-19 in the peristaltic pump 11, the on-line processing component, and the flow cell 44 in the detector 45 are connected in sequence, and the optical path of the flow cell 28 10-50 mm; the detector 45 is connected with the computer processing system 47 through the signal line 46 .

[0029] The automatic sampling device 1 includes a sampling needle 2 , a sample tray 52 , a sampling needle cleaning pool 53 , and a pipeline cleaning pool 54 .

[0030] Online processing components include:

[0031] (1) Sample injection valve 31, the injection valve 31 has six interfaces A, B, C, D, E, and F;

[0032] (2) online distillation module 23, such...

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Abstract

The invention relates to an automatic analyzer for determining the content of ammonia nitrogen in water and sewage through a flow injection colorimetric process and an automatic analytic method thereof. The automatic analyzer for determining the content of ammonia nitrogen in water and sewage comprises an automatic injection device, a peristaltic pump, a detector, and an online processing assembly, wherein the online processing assembly comprises a sample injection valve, braided reactors, three-way valves, a four-way valve, online heating modules, an online distillation module, an online degasser, and capillary connecting tubes. According to the automatic analyzer of the invention, samples can be continuously and automatically tested, the test speed is fast, fifty samples can be tested each hour, the test sensitivity is high, and the test accuracy is good; and according to the method of the invention, the liner range is 0.02-4.0mg / L, the liner correlation coefficient r is equal to or more than 0.999, the detection limit is 2.49mug / L, the standard addition recovery rate of practical water samples is 90-110%, the precision is high, and the repeatability is good.

Description

technical field [0001] The invention relates to the automatic analysis of ammonia nitrogen in water and sewage, in particular to an automatic analyzer for measuring ammonia nitrogen in water by flow injection colorimetry and an automatic analysis method for ammonia nitrogen in water. Background technique [0002] Ammonia nitrogen exists in the form of free ammonia or ammonium salt in natural water bodies, and the composition ratio of the two depends on the pH value of the water body. Its main source is the decomposition of nitrogen-containing organic matter in domestic sewage by microorganisms, and some industrial wastewater also contains ammonia nitrogen. When the content of ammonia nitrogen in the water body is high, eutrophication will occur, which will consume dissolved oxygen in the water and cause the fish in the water to suffocate due to hypoxia. At present, the manual analysis method is mostly used for the determination of ammonia nitrogen, which has many interferen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/31G01K7/18
Inventor 肖靖泽赵萍赵立晶魏月仙顾爱平
Owner BEIJING JITIAN INSTR CO LTD
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