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A method and device for detecting acute toxicity of water quality

A technology of acute toxicity and detection method, which is applied in the field of environmental pollution detection, can solve problems such as interference, achieve the effects of short time consumption, easy automatic detection, and elimination of matrix effect

Active Publication Date: 2017-09-29
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, this method is susceptible to the interference of other aerobic bacteria in the sample matrix, and it is difficult to avoid the impact of fixing bacteria on the electrode on the bacteria and the electrode

Method used

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  • A method and device for detecting acute toxicity of water quality
  • A method and device for detecting acute toxicity of water quality
  • A method and device for detecting acute toxicity of water quality

Examples

Experimental program
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Embodiment

[0033] Take allylthiourea in water tested by this electrode as an example.

[0034] Such as figure 1 As shown, the flow analysis system includes a sample pool 2, a switching valve 3, a peristaltic pump 4 and a detection pool 8; wherein the sample pool 2 and the detection pool 8 are connected by pipelines, and the pipeline between the sample pool 2 and the detection pool 8 There are two first and second switching valves 3 for controlling the flow direction of the solution, and the pipeline between the first and second two switching valves 3 is provided with a peristaltic pump 4 and a fixed nitrosative unit cell for carrying the solution to flow. Bacteria filter membrane support 5; Wherein the detection pool 8 is inserted with a potential measuring device, and the other end is connected to the second waste water pool 12; The second switching valve 3 in front of the detection pool 8 is connected to the first waste water pool 7. There are two sample pools 2, which are connected i...

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Abstract

The invention belongs to the technical field of environmental pollution detection, and in particular relates to a detection method and a device for acute toxicity of water quality. Toxicity analysis is carried out by using the degree to which the rate of oxidation of ammonium ions decreases after nitrosative bacteria are inhibited by toxic substances. Connect the bacteria and the selective electrode in series in the flow analysis system, first pass the sample into the system to interact with the bacteria, then switch the medium and pass into the buffer solution containing ammonium ions, the rate of ammonium ion oxidation by the bacteria can be measured by the ammonium ion selective electrode The potential signal change is calculated. The invention adopts a medium conversion method, eliminates the matrix effect, and avoids fouling of the electrode by the sample. The ammonium ion selective electrode is used to measure the ammonia oxidation rate, which avoids the interference of other aerobic bacteria when the oxygen electrode is used to measure dissolved oxygen.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution detection, and in particular relates to a detection method and a device for acute toxicity of water quality. Background technique [0002] The methods currently used for acute toxicity detection of water quality mainly include physical and chemical methods and biological methods. Physical and chemical methods can qualitatively and quantitatively analyze the types and concentrations of pollutants in water bodies, but cannot determine the direct relationship between the concentration of toxic substances and biological effects. In addition, physical and chemical methods often require the use of instruments such as gas chromatography, high performance liquid chromatography, and atomic spectroscopy. The analysis costs are high, the monitoring speed is slow, and the operation steps are cumbersome. Biological methods can comprehensively reflect the impact of pollutants on organisms, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416
Inventor 秦伟张倩玉丁家旺李龙
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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