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Method and device for detection of water acute toxicity

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

Active Publication Date: 2014-10-08
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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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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  • Method and device for detection of water acute toxicity
  • Method and device for detection of water acute toxicity
  • Method and device for detection of water acute toxicity

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 relates to a method and a device for detection of water acute toxicity. The method realizes toxicity analysis according to a reduction degree of an ammonium ion oxidation rate after nitrite bacteria are inhibited by noxious materials. Bacteria and a selective electrode are connected in a flow analysis system in series, a sample is fed into the system and is acted by the bacteria, then a medium is transformed, an ammonium ion-containing buffer solution is used, and an ammonium ion oxidation rate of the bacteria can be obtained by calculation of change of potential signals detected by an ammonium ion selective electrode. The method utilizes a medium transition technology, eliminates matrix effects and avoids electrode pollution and damage caused by a sample. The method and the device utilize the ammonium ion selective electrode to realize ammoxidation rate determination so that interference produced by other aerobic bacteria in oxygen electrode-based dissolved oxygen determination is avoided.

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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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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