Seawater total organic carbon automatic on-line monitoring instrument

A total organic carbon and monitoring instrument technology, applied in the direction of instruments, measuring devices, scientific instruments, etc., can solve the problems of low instrument precision, many consumables, expensive instruments, etc., achieve huge industrial prospects, wide application range, and low operating costs low effect

Inactive Publication Date: 2010-03-17
OCEAN UNIV OF CHINA
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Problems solved by technology

This method completely oxidizes organic matter, but the disadvantage is that too many consumables are needed for the determination of seawater, and the price is relatively expensive.
[0008] At present, there are instruments made of these principles on the market, but the main problems are as follows: (1) Domestic instruments have low precision and high detection limits, and can only be used for the determination of high-concentration TOC in freshwater systems such as industrial sewage, and cannot meet the requirements of high-concentration TOC in seawater systems. Analysis of low-con...

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  • Seawater total organic carbon automatic on-line monitoring instrument

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0021] Such as figure 1 As shown, the present invention needs to be turned on and preheated for 30 minutes before the measurement, and after the temperature in the ultraviolet device 17 is stabilized, the peristaltic pumps 703-706 and solenoid valves 802 and 804 are turned on. The sample is pumped into the inorganic carbon removal device by the pump 701, and after the liquid is fed to a certain height, the solenoid valve 803 is opened for 1 second and then closed, and the phosphoric acid solution is injected, and then the solenoid valve 802 is opened, and the carrier gas starts to bubble to remove the inorganic carbon. After blowing for 3 minutes, the solenoid valve 802 is closed, the peristaltic pump 702 is turned on, and the peristaltic pump 703 is turned off at the same time, and the sample injection starts. After injecting 1 mL of ...

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Abstract

The invention relates to a seawater total organic carbon (TOC) automatic on-line monitoring instrument which comprises an inorganic carbon removing unit, a sample introduction unit, an oxidation unit,a cooling unit, a gas-liquid separating unit and a carbon dioxide detecting unit; wherein the inorganic carbon of the sample to be detected is blown and removed by the inorganic carbon removing unit;then the sample to be detected is sent into a pipeline through a six-way valve, mixed with potassium persulfate sodium borate, heated in an ultraviolet device and has catalytic reaction under the ultraviolet irradiation; the organic carbon in the sample is oxidized into inorganic carbonate which is then mixed with hydrochloric acid to be transformed into carbonic acid; and after gas-liquid separation, carbon dioxide gas can be formed and finally enters into a non-dispersive infrared analyzer to be detected. The instrument can be simultaneously used for measuring the inorganic carbon and the organic carbon in the water sample, so that the TOC in the seawater can be rapidly and automatically measured in an on-line way.

Description

technical field [0001] The invention relates to a marine monitoring instrument, in particular to an automatic on-line monitoring instrument for total organic carbon in seawater. Background technique [0002] Total organic carbon (abbreviated as TOC) is a comprehensive index that characterizes the total amount of organic matter in water, and it represents the sum of organic matter in water. TOC can not only reflect the degree of pollution of water body by organic substances, but also can reflect the situation of life activities in water body as a biogenic element. Moreover, TOC plays an important role in the study of the global cycle of carbon. At present, TOC measurement has been widely used in rivers, lakes and ocean monitoring, and has gradually become a routine parameter for water quality monitoring. [0003] The determination of TOC in water usually consists of three steps: (1) sample pretreatment, including sampling, filtration, acidification, and removal of inorganic ...

Claims

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Application Information

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IPC IPC(8): G01N21/35G01N1/28G01N21/3577
Inventor 王江涛谭丽菊李月
Owner OCEAN UNIV OF CHINA
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