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
CN102374989AInactive Publication Date: 2012-03-14BEIJING JITIAN INSTR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING JITIAN INSTR CO LTD
Publication Date
2012-03-14
Estimated Expiration
Not applicable · inactive patent

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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.
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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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