Detection method for odor substances in water environment

A detection method and water environment technology, applied in the field of analysis and detection, can solve the problems of affecting the extraction effect, decreasing the detection accuracy, easily generating foam, etc., and achieving the effects of simple and easy operation, reduced damage and high recovery rate.

Active Publication Date: 2015-11-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this patent detects many odorous substances and has high detection efficiency, it is easy to generate...

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  • Detection method for odor substances in water environment
  • Detection method for odor substances in water environment
  • Detection method for odor substances in water environment

Examples

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Embodiment 1

[0050] A method for detecting odorous substances in a water environment, comprising the steps of: diluting a mixed standard stock solution to obtain mixed mixtures with concentrations of 5ng / L, 10ng / L, 20ng / L, 40ng / L, 100ng / L, and 200ng / L, respectively. Standard solution, the mixed standard solution of each concentration is placed in the solid-phase microextraction sample vial with PTFE cover respectively, add the NaCl that the addition amount is 30% of the mixed standard solution quality, put into PTFE cylindrical magnetic stirring bar, and control The temperature of the solid-phase microextraction sample vial is 65°C, and the magnetic stirring speed is 1500r / min. Then, the extraction fiber aged at 270°C for 1 hour: 85 μm CAR / PDMS is placed in the solid-phase microextraction vial for extraction for 30 minutes. After the extraction, Transfer the extracted fiber to a gas chromatography-mass spectrometer for detection, and use the external standard peak area method for quantitati...

Embodiment 2

[0071] A method for detecting odorous substances in a water environment, comprising the following steps:

[0072] (1) Standard curve preparation: Dilute the mixed standard stock solution to obtain mixed standard solutions with concentrations of 5ng / L, 10ng / L, 20ng / L, 40ng / L, 100ng / L, and 200ng / L, and mix the mixed standard solutions of each concentration The standard solution is placed in the solid-phase microextraction sample bottle with PTFE cover respectively, and the addition amount is the NaCl of 10% of the quality of the mixed standard solution, put into the PTFE cylindrical magnetic stirrer, and control the temperature of the solid-phase microextraction sample bottle to be 45°C, the magnetic stirring speed is 1000r / min, and then the extraction fiber aged at 270°C for 1h - 100μm PDMS is placed in the solid phase microextraction vial for extraction for 10min. After the extraction is completed, the extracted extraction fiber is transferred to the gas phase Detect in the ch...

Embodiment 3

[0075] (1) Standard curve preparation: Dilute the mixed standard stock solution to obtain mixed standard solutions with concentrations of 5ng / L, 10ng / L, 20ng / L, 40ng / L, 100ng / L, and 200ng / L, and mix the mixed standard solutions of each concentration The standard solution is placed in the solid-phase microextraction sample bottle with PTFE cover respectively, and the NaCl that the addition amount is 20% of the quality of the mixed standard solution is added, and the PTFE cylindrical magnetic stirrer is put into it, and the temperature of the solid-phase microextraction sample bottle is controlled to 75°C, the magnetic stirring speed is 100r / min, and then the extraction fiber aged at 270°C for 1h - 30 / 50μmCAR / DVB / PDMS is placed in a solid-phase microextraction vial for 40min extraction. After the extraction is completed, the extracted The extracted fibers were transferred to a gas chromatography-mass spectrometer for detection, and quantitatively determined by the external standa...

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Abstract

The present invention relates to a detection method for odor substances in a water environment. The detection method comprises: (1) standard curve preparation: preparing different concentrations of mixing standard solutions of various odor substances, carrying out a pre-treatment, carrying out gas chromatography and mass spectrometry detection, corresponding the detected mass spectrometry response values and the detected chromatography peak response values of each odor substance to the concentration, and preparing a standard curve; (2) water sample collection and storage: collecting a water sample to be detected, and placing into a preservation container so as to be stored; and (3) water sample detection: taking out the stored water sample, carrying out a pre-treatment, transferring to a gas chromatograph-mass spectrometer so as to be detected, and combining the detected mass spectrometry response value and the standard curve prepared in the step (1) so as to obtain the concentration of the odor substance in the water sample. Compared with the detection method in the prior art, the detection method of the present invention has advantages of precise quantitation, high odor substance recovery rate, environmental protection, easy operation and the like.

Description

technical field [0001] The invention relates to the technical field of analysis and detection, in particular to a method for detecting odorous substances in a water environment. Background technique [0002] With the continuous discharge of a large amount of domestic sewage and production wastewater, the problem of eutrophication in water bodies tends to be serious. When the external conditions are suitable, the algal blooms in the eutrophic water body will multiply and form algae blooms. The outbreak of algal blooms is often accompanied by the release of harmful secondary metabolites, causing water pollution and affecting the normal structure and function of water bodies. Among them, volatile secondary metabolites cause odor problems, which cause irritating odors in water bodies and aquatic products, resulting in a decline in drinking water quality, increased difficulty in water treatment, and substandard quality of aquatic products. At the same time, it also seriously aff...

Claims

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Application Information

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IPC IPC(8): G01N30/88G01N30/06
Inventor 成水平周洋唐孟煊钟非吴娟代嫣然崔娜欣向东方
Owner TONGJI UNIV
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