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Method for simultaneously determining multiple thioether odor substances in water body

An odorant and thioether technology, applied in the field of environmental water quality monitoring, can solve problems such as inapplicability, and achieve the effects of simple operation, high sensitivity, and improved detection efficiency

Pending Publication Date: 2020-07-31
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this technology has greatly improved the detection limit and analysis time compared with the closed-loop stripping technology, it is still not suitable for DMS with a low boiling point. , to further improve the detection efficiency has become a key technical problem to be solved urgently

Method used

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  • Method for simultaneously determining multiple thioether odor substances in water body
  • Method for simultaneously determining multiple thioether odor substances in water body
  • Method for simultaneously determining multiple thioether odor substances in water body

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Embodiment Construction

[0029] Below in conjunction with specific implementation example, above-mentioned scheme is described further, and preferred embodiment of the present invention is described in detail as follows:

[0030] In this embodiment, a method for simultaneously determining a variety of thioether odor substances in water, using the method of headspace solid-phase microextraction-gas chromatography, the various thioether odor substances include methyl sulfide Ether (DMS), dimethyl disulfide (DMDS), dimethyl trisulfide (DMTS), methyl ethyl sulfide (MES), diethyl sulfide (DES), diethyl disulfide (DEDS); The method for simultaneously measuring multiple thioether odor substances in water body comprises the following steps:

[0031] a The connection of the instrument and its setting:

[0032] a-1. Instrument connection:

[0033] A headspace solid-phase microextraction-gas chromatography-mass spectrometry device is composed of a magnetic stirring water bath, an extraction head, a magnetic st...

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Abstract

The invention discloses a method for simultaneously determining multiple thioether odor substances in a water body. The multiple thioether odor substances in the water body are simultaneously determined by utilizing headspace solid phase microextraction-gas chromatograph-mass spectrometer (HSPE-GC / MS). The method disclosed by the invention can be used for simultaneously determining common thioethers in various water bodies, such as dimethyl sulfide (DMS), dimethyl disulfide (DMDS), dimethyl trisulfide (DMTS), methyl ethyl sulfide (MES), diethyl sulfide (DES) and diethyl disulfide (DEDS). At present, reports about simultaneous determination of the multiple substances by adopting one method do not exist, the method fills the blank, multiple thioethers in the water body are quantitatively analyzed at a time, and the detection efficiency is greatly improved. The method is high in sensitivity and good in reproducibility, the detection limit of various thioether odor substances is below theodor threshold value of the odor substances, and the method can be widely applied to detection of dynamic changes of the various thioether odor substances in natural water.

Description

technical field [0001] The invention relates to a method for detecting smell and taste substances in water, in particular to a method for measuring thioether smell and taste substances in water, which is applied in the technical field of environmental water quality monitoring. Background technique [0002] Sulfur ether is an odor substance in water, which has a significant impact on tap water and aquatic products because of its foul smell, and causes huge economic losses. Complaints about landscape water bodies, tap water, and aquatic products have increased in recent years, especially during algae blooms. In addition to 2-methylisoborneol and geosmin, which have attracted much attention, odor substances such as DMS, DMDS, and DMTS produced during the decomposition and decay of algae have also attracted more and more attention. Since these odorants often erupt at the same time, the sources, biotransformation, and removal of odorants in farms have gradually received widespre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06G01N30/88
CPCG01N30/06G01N30/88
Inventor 潘赟陈军燕孙家良焦正张晓岚
Owner SHANGHAI UNIV
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