Detection device and detection method of nitrite or nitrate content

A technology of nitrate content and nitrite, applied in the field of seawater chemical analysis, can solve problems such as affecting the accuracy of detection results, easy generation of bubbles, incomplete reaction, etc., to improve reduction efficiency, avoid repeated filling work, and small volume. Effect

Active Publication Date: 2016-02-10
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology

However, the detection point at this time is not necessarily the point with the highest degree of reaction completion, and there are problems such as poor parallelism, poor stab

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  • Detection device and detection method of nitrite or nitrate content
  • Detection device and detection method of nitrite or nitrate content
  • Detection device and detection method of nitrite or nitrate content

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Embodiment Construction

[0061] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0062] The detection device of this embodiment is mainly used to detect the content of nitrite and / or nitrate in sample solutions such as seawater, and includes a peristaltic pump P, a flow cuvette F, a light source LED, a light receiver D, a cadmium circle C and Seven three-way solenoid valves V1-V7 and other main components, such as figure 1 shown.

[0063] In order to facilitate the installation and fixing of each component in the detection device, a fluid multi-manifold valve plate (not shown in the figure) is preferably set in the detection device in this embodiment, preferably made of plexiglass, to prevent acid, alkali, Corrosion by high salt and other solutions. A plurality of fluid channels are etched inside the fluid multi-manifold valve plate, and these fluid channels are used as a part of the flow path to communicate with the thr...

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Abstract

The invention discloses a detection device and a detection method of nitrite or nitrate content. The detection device comprises a peristaltic pump, a flowing cuvette, a light source, an optical receiver, a cadmium ring and seven three-way electromagnetic valves, wherein sampling, circulation, developing, reduction and waste discharging are realized via controlling of the peristaltic pump and selection of the three-way electromagnetic valves, so as to shorten the flow path of the detection device, and ensure high integration level, small size and on-line analysis suitability. Via circulation design, the reaction efficiency is greatly improved; reaction products in the whole loop are uniform in concentration; an average value can be obtained via repeated measurement; the parallelity and the stability are greatly improved. Moreover, the cadmium ring is taken as a reduction component, and a sample solution to be detected flows in the cadmium ring at a certain speed, so that not only is the reduction efficiency improved, but also repeated filling is avoided, and the operation is convenient and fast; use of poisonous and harmful reagents is avoided.

Description

technical field [0001] The invention belongs to the technical field of seawater chemical analysis, and in particular relates to a device and a method for detecting the content of nitrite and nitrate in seawater. Background technique [0002] Nitrite and nitrate widely exist in marine water bodies and are one of the important parameters for marine ecological environment monitoring. At present, the determination of nitrite and nitrate in seawater is mainly based on the marine monitoring specification (GB17378-2007), using the field sampling-laboratory measurement method based on the survey ship. This method has disadvantages such as poor real-time performance, easy contamination of the sample solution to be tested, and waste of manpower and material resources. In recent years, online measurement devices and methods have become one of the research hotspots in the marine field. [0003] At present, the main method for the determination of nitrite and nitrate in seawater is spe...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/78
Inventor 郭翠莲张述伟褚东志马然程岩刘岩程永强曹璐曹煊孔祥峰张丽石小梅吕婧高杨范萍萍邹妍
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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