Photocatalysis portable water quality total organic carbon detection device and detection method

A technology of total organic carbon and detection device, which is applied in measurement devices, chemical analysis by catalysis, material analysis by optical means, etc., can solve the problems of expensive catalysts, large area, inaccurate measurement results, etc. Low cost, high detection limit, accurate results

Active Publication Date: 2020-03-17
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention solves the technical defects of inaccurate measurement results of the water quality total

Method used

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  • Photocatalysis portable water quality total organic carbon detection device and detection method
  • Photocatalysis portable water quality total organic carbon detection device and detection method
  • Photocatalysis portable water quality total organic carbon detection device and detection method

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Embodiment 1

[0033] A photocatalytic portable water quality total organic carbon detection device, comprising a sequentially connected sampling module, a photocatalytic reaction module and a carbon dioxide detection module;

[0034] The sampling module includes a sampling needle 1 and a sampling device 2, the photocatalytic reaction module includes a reaction chamber 3 and a photocatalytic sheet 4, and the photocatalytic sheet 4 is vertically placed in the reaction chamber 3; The upper surface of reaction chamber 3 is distributed with sampling port 5, and described sampling port 5 is connected with sampling device 2, and described sampling needle 1 is used for injecting water sample into reaction chamber through sampling device 2 and sampling port 5 The surface of the photocatalyst sheet 4 in 3; the inside of the sampling device 2 has a sealing gasket 6; the sealing gasket 6 is used to make the reaction chamber 3 in a sealed state when the sampling needle 1 is not injected into the water sa...

Embodiment 2

[0038] A photocatalytic portable water quality total organic carbon detection device, comprising a sequentially connected sampling module, a photocatalytic reaction module and a carbon dioxide detection module;

[0039] The sampling module includes a sampling needle 1 and a sampling device 2, the photocatalytic reaction module includes a reaction chamber 3 and a photocatalytic sheet 4, and the photocatalytic sheet 4 is vertically placed in the reaction chamber 3; The upper surface of reaction chamber 3 is distributed with sampling port 5, and described sampling port 5 is connected with sampling device 2, and described sampling needle 1 is used for injecting water sample into reaction chamber through sampling device 2 and sampling port 5 The surface of the photocatalyst sheet 4 in 3; the inside of the sampling device 2 has a sealing gasket 6; the sealing gasket 6 is used to make the reaction chamber 3 in a sealed state when the sampling needle 1 is not injected into the water sa...

Embodiment 3

[0047] A method for detecting water quality total organic carbon, comprising the following steps:

[0048] S1: The sampling needle 1 injects deionized water into the surface of the photocatalytic sheet 4 in the reaction chamber 3 through the sampling device 2 and the sampling port 5, and the detection unit 10 measures the volume concentration S of the original carbon dioxide in the reaction chamber 3 0 Turn on the ultraviolet light source 7, so that the ultraviolet light emitted by the ultraviolet light source 7 is irradiated on the surface of the photocatalytic sheet 4, and the organic matter on the photocatalytic sheet 4 is catalyzed to generate carbon dioxide, and now the detection unit 10 measures the reaction chamber 3 The volumetric concentration of carbon dioxide is S 0 ';

[0049] S2: The sample needle 1 injects the water sample to be tested into the surface of the photocatalytic sheet 4 in the reaction chamber 3 through the sample injection device 2 and the sample in...

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Abstract

The invention relates to a photocatalysis portable water quality total organic carbon detection device and a detection method and belongs to the technical field of environmental protection monitoring.The detection device comprises a sample injection module, a photocatalytic reaction module and a carbon dioxide detection module which are connected in sequence, wherein the photocatalytic reaction module comprises a reaction chamber and a photocatalytic sheet, the photocatalytic sheet can catalyze organic matters in a water sample to generate carbon dioxide under the irradiation of ultraviolet light, and the carbon dioxide detection module detects the concentration of the carbon dioxide generated in the photocatalytic reaction module so that the content of total organic carbon in the water sample is calculated. The detection device is advantaged in that the detection device can be used for detecting a TOC value of the water sample in a certain time period at a certain place in a portableand real-time manner, is different from a combustion method of a traditional TOC detector, and the efficient photocatalysis technology is utilized to mineralize the organic matters into carbon dioxide for detection in a short time, and has great significance in the aspects of energy conservation and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of environmental protection monitoring, and relates to a photocatalytic portable water quality total organic carbon detection device and a detection method. Background technique [0002] Among various monitoring indicators of water quality, total organic carbon (TOC) can intuitively represent the total amount of organic matter in water, and is one of the important reference indicators for evaluating organic pollution of water quality. The traditional TOC instrument in the laboratory usually uses the principle of high-temperature catalytic combustion oxidation-non-dispersive infrared detection (NDIR), which requires water samples to be burned in a high-temperature combustion tube at 900 °C and a low-temperature combustion tube at 150 °C under the condition of supporting gas. For tube combustion mineralization, platinum and cobalt trioxide or dicobalt trioxide are also required as catalysts in high-temperature...

Claims

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Application Information

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IPC IPC(8): G01N31/10G01N21/3504
CPCG01N21/3504G01N31/10
Inventor 张延荣徐鑫
Owner HUAZHONG UNIV OF SCI & TECH
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