Single organic matter standard gas concentration detecting device and method

A detection device and organic matter technology, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve problems such as unsolvable analysis problems, inability to accurately analyze the concentration of organic gases, etc., and achieve simple structure, low cost, and fast detection Effect

Inactive Publication Date: 2015-05-13
HEFEI UNIV OF TECH
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Problems solved by technology

However, this method is only suitable for measuring the content of organic matter in the liquid phase, and the analytical problem of determining the concentration of organic matter in the standard gas is still unsolved
In this regard, Chinese patent CN101915791A discloses "a method and device for detecting the content of total organic matter in gas". The

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  • Single organic matter standard gas concentration detecting device and method
  • Single organic matter standard gas concentration detecting device and method
  • Single organic matter standard gas concentration detecting device and method

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[0027] Under the control of the constant temperature device 5, the gas-liquid phase balance device is in an environment of 25 ° C. The gas-liquid phase balance tank 6 in the gas-liquid phase balance device is made of a material that is not easy to absorb. Considering the height of the solution, the gas-liquid phase balance tank is made It is about 30cm high and 3.5cm in diameter. Take a small hole of 6mm at the bottom of one side of the gas-liquid balance tank at about 5cm for sampling. Insert the inlet conduit 3-1 and the outlet conduit 3-2 at the mouth of the tank. The other places are sealed with rubber plugs. The diameter of the air intake duct 3-1 and the air outlet duct 3-2 is 1cm, and the bottom of the air intake duct 3-1 is a sand core filter plate 7 made of sintered glass, which is used for tiny Air bubbles to increase the contact area between gas and liquid. The gas-liquid phase balance tank 6 is filled with a special 2mol / L NaNO 3solution, the pH is adjusted to 8-9...

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Abstract

The invention discloses a single organic matter standard gas concentration detecting device and method which are used for solving the problem about organic gas concentration analysis in the standard gas production process. The single organic matter standard gas concentration detecting device comprises a gas-liquid phase balance device and a photoelectrocatalysis COD (chemical oxygen demand) measuring device, wherein in the gas-liquid phase balance device, to-be-detected gas enters a prepared standard solution through a valve, a gas pressure relief valve and a sand core filter plate to form small bubbles, and the concentration of organic matters in a liquid phase gradually get stable in the rising process of the bubbles in the liquid; in the photoelectrocatalysis COD measuring device, a TiO2 working electrode is irradiated by ultraviolet light, the organic matters in the liquid phase are oxidized through photoelectrocatalysis, coulomb electric charge is calculated through light current measurement, and a value of COD in the liquid is obtained. The concentration of the organic matters in the liquid is calculated according to an organic matter molecular formula, and the concentration of organic gas in gas is obtained in combination of the henry's law.

Description

technical field [0001] The invention relates to the field of organic standard gas detection, in particular to a detection device and method for the concentration of a single organic standard gas. Background technique [0002] At present, in the production process of the standard gas, it is of great significance to analyze the concentration of organic gases in the standard gas. For the analysis of the concentration of a single volatile organic gas in the standard gas, the most commonly used methods are gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). process. These detection methods have problems such as complex operation, long time-consuming, difficult separation of some components, and the need to prepare relevant standard curves in advance. In recent years, the technology of liquid-phase photocatalytic determination of chemical oxygen demand (COD) has been developed rapidly. This method of photocatalytic reaction is carried out in a thin-layer mi...

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Application Information

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IPC IPC(8): G01N27/416
Inventor 李建权杜绪兵孙凯郭腾
Owner HEFEI UNIV OF TECH
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