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Method for conveniently and quickly detecting odor substances including geosmin and dimethyl isoborneol in water source

A technology of dimethyl isobornol and olfactory substances, applied in the field of analytical chemistry, can solve the problems of limited sample volume and high operation requirements, and achieve the effects of reducing pollution, convenient sampling, and no risk of solvent pollution

Active Publication Date: 2020-01-10
广州华速信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional dispersion liquid-liquid microextraction technology, halogenated alkanes (more toxic) with a density higher than water are used as the extraction agent, and the extraction operation can be completed by using a conical bottom centrifuge tube. After extraction and centrifugation, the extraction agent containing the target compound is deposited At the bottom of the centrifuge tube, it is necessary to use a sampling needle to pass through the upper solvent and insert it into the bottom of the centrifuge tube to take out the enriched sample to be tested. The operation requirements are relatively high and the size of the centrifuge in the analysis laboratory limits the volume of the sample.

Method used

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  • Method for conveniently and quickly detecting odor substances including geosmin and dimethyl isoborneol in water source
  • Method for conveniently and quickly detecting odor substances including geosmin and dimethyl isoborneol in water source
  • Method for conveniently and quickly detecting odor substances including geosmin and dimethyl isoborneol in water source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] For the rapid separation and detection method of 2-MIB and GSM in tap water, the specific operation steps are as follows:

[0033] (1) Prepare saturated salt solution: take 36.0gNaCl and 19.55gNa 2 SO 4 Dissolve in 100mL secondary water respectively, then mix the two and place them in a 250mL volumetric flask, and place the volumetric flask at room temperature for later use;

[0034] (2) Pretreatment of the water sample to be tested: Take 7.5 mL of tap water to be tested and place it in a special container with a capacity of 25 mL, add 5 mL of the saturated salt solution prepared in step (1), then add 0.5 mL of cyclohexane, shake After mixing, put it into an ultrasonic oscillator for 3 minutes of ultrasonic oscillation. After the oscillation is completed, take out the special container and use secondary water to make up the volume so that the highest liquid level of the liquid is flush with the upper part of the thin tube in the special container. Let it stand at 18°C ...

Embodiment 2

[0037]For the rapid separation and detection method of 2-MIB and GSM in well water, the specific operation steps are as follows:

[0038] (1) Prepare saturated salt solution: take 36.0gNaCl and 19.55gNa 2 SO 4 Dissolve in 100mL secondary water respectively, then mix the two and place them in a 250mL volumetric flask, and place the volumetric flask at room temperature for later use;

[0039] (2) Pretreatment of the water sample to be tested: take 7.5 mL of the well water to be tested and place it in a special container with a capacity of 25 mL, add 5 mL of the saturated salt solution prepared in step (1), and then add 0.5 mL of cyclohexane, After oscillating and mixing, put it into an ultrasonic oscillator and oscillate ultrasonically for 3 minutes. After the oscillation is completed, take out the special container and use secondary water to make up the volume so that the highest liquid level of the liquid is flush with the upper part of the thin tube in the special container....

Embodiment 3

[0042] For the rapid separation and detection method of 2-MIB and GSM in river water, the specific operation steps are as follows:

[0043] (1) Prepare saturated salt solution: take 36.0gNaCl and 19.55gNa 2 SO 4 Dissolve in 100mL secondary water respectively, then mix the two and place them in a 250mL volumetric flask, and place the volumetric flask at room temperature for later use;

[0044] (2) Pretreatment of the water sample to be tested: take 7.5 mL of the river water to be tested and place it in a special container with a capacity of 25 mL, add 5 mL of the saturated salt solution prepared in step (1), then add 0.5 mL of cyclohexane, shake After mixing, put it into an ultrasonic oscillator for 3 minutes of ultrasonic oscillation. After the oscillation is completed, take out the special container and use secondary water to make up the volume so that the highest liquid level of the liquid is flush with the upper part of the thin tube in the special container. Let it stand ...

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Abstract

The invention discloses a method for conveniently and rapidly detecting odor substances including geosmin and dimethyl isoborneol in a water source, and belongs to the technical field of analytical chemistry. The method is based on the dispersion liquid-liquid microextraction technology, achieves the effective enrichment and extraction of 2-MIB and GSM in a to-be-detected water sample by utilizinga specific device and a specific treatment method for the sample, and then achieves the analysis and measurement of the content of 2-MIB and GSM in the water sample by utilizing a gas chromatograph-mass spectrometer, thereby achieving the rapid separation and detection of trace 2-MIB and GSM in the water sample. The method provided by the invention is suitable for conventional drinking water andwell water or river water in a natural environment, can realize effective enrichment, rapid separation, analysis and detection of odor substances in various water bodies, and especially realizes detection of the odor substances in the water bodies in the natural environment.

Description

technical field [0001] The invention relates to a method for quickly detecting the odor substances geosmin and dimethylisoborneol in water sources, and belongs to the technical field of analytical chemistry. Background technique [0002] For a long time, the quality of drinking water has been affected by olfactory substances, and the reasons for the peculiar smell of water bodies are very complicated. Up to now, there is no definite statement that can be widely recognized. It is generally believed that dimethyl isoborneol (2-MIB) and Geosmin (GSM) is the main cause of musty smell. Both GSM and 2-MIB are derived from the secretion of algae and belong to saturated cyclic tertiary alcohols, which are the metabolic and biodegradation products of actinomycetes and cyanobacteria. The synthesis pathways of cyanobacteria to produce earth bromide and dimethylisoborneol have not been studied yet, but some progress has been made on the reaction mechanism of actinomycetes to synthesize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88G01N30/06G01N30/16
CPCG01N30/88G01N30/06G01N30/16G01N2030/884G01N2030/062
Inventor 宋兴良
Owner 广州华速信息技术有限公司
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