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Analysis method for simultaneously collecting and detecting gas-phase and particle-phase organic amines in atmospheric environment

A technology of atmospheric environment and analysis method, applied in the direction of analyzing materials, measuring devices, material separation, etc., can solve problems such as low attention, complex derivation process, etc., achieve low initial investment, fast derivation process, and broad due prospects Effect

Pending Publication Date: 2021-06-22
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there have been reports on the qualitative and quantitative analysis of organic amines in the particle phase by gas chromatography-mass spectrometry (GC-MS) after derivatization with isobutyl chloroformate, the derivatization process is also relatively complicated.
The use of benzenesulfonyl chloride as a derivatization reagent may make the derivatization process simpler and faster, but the current derivatization method is only used for the detection of particulate matter samples, and has not been able to simultaneously detect gas phase and particle phase samples.
In addition, most of the current observations of organic amines in the atmosphere focus on low-mass small molecule organic amines (such as methylamine, dimethylamine, and ethylamine, etc.), and for dihexylamine, tert-butylamine, cyclohexylamine, and dipentylamine Organic amines with longer carbon chains and higher molecular weights such as amines have received less attention

Method used

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  • Analysis method for simultaneously collecting and detecting gas-phase and particle-phase organic amines in atmospheric environment
  • Analysis method for simultaneously collecting and detecting gas-phase and particle-phase organic amines in atmospheric environment
  • Analysis method for simultaneously collecting and detecting gas-phase and particle-phase organic amines in atmospheric environment

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Experimental program
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Effect test

Embodiment 1

[0034] figure 1 It is a flow chart of the analytical method for the simultaneous detection of gaseous phase and particulate phase organic amines in the atmospheric environment of the present invention, and its specific steps are as follows: figure 1 Shown:

[0035]1. A filter membrane (105 cm) soaked with methanol solution containing 5% (v / v%) phosphoric acid 2 / sheet) was dried at 40°C for 10 h to obtain an acidified filter membrane. Fix the acidified filter membrane and the unacidified filter membrane in the sampler in turn, the upper layer is for particle collection, and the lower layer is for gas phase sample collection; the flow rate is 0.65L / min, and the collection time is 8h to obtain samples containing gas phase and particle phase membrane;

[0036] 2. Cut the sample filter membranes containing gas phase and particle phase obtained in step 1 into pieces and place them in brown bottles. Use 20mL of ultra-pure water to ultrasonically extract the filter membrane three...

Embodiment 2

[0042] 1. Sampling filter membranes are divided into acidified filter membranes and non-acidified filter membranes. The filter membranes soaked in methanol solution containing 5% (v / v%) phosphoric acid are then dried at 40°C for 10h to obtain acidified filter membranes. The filter membrane that has not been soaked in phosphoric acid is an unacidified filter membrane;

[0043] 2. Take the acidified and non-acidified filter membrane obtained in step 1 respectively 30cm 2 , cut into pieces and placed in a brown bottle, and added 20 μL of 100 mg / mL mixed standard solution of 15 kinds of organic amines. Use 20mL of ultra-pure water to ultrasonically extract the filter membrane three times, each time for 15min, and transfer the sonicated aqueous solution to a new brown bottle. Add 200 μL and 1000 μL of 10 mol / L NaOH solution to the particle phase and gas phase organic amine sample extracts, respectively. Then add 20 μL of 100 μg / mL dimethylamine-D6 solution and 200 μL of benzenesu...

Embodiment 3

[0049] 1. After soaking the filter membrane with a methanol solution containing 5% (v / v%) hydrochloric acid, the filter membrane was dried at 40° C. for 12 hours to obtain an acidified filter membrane. The acidified filter membrane and the unacidified filter membrane were respectively fixed in the sampler in sequence, the upper layer was for particle collection, and the lower layer was for gas phase sample collection. The flow rate is 0.35L / min, the collection time is 8h, and the sample filter membrane containing gas phase and particle phase is obtained;

[0050] 2. Take the filter membrane samples of gas phase and particle phase in the atmospheric environment obtained in step 1 respectively for 30 cm 2 , cut into pieces and placed in a brown bottle. Use 20mL of ultra-pure water to ultrasonically extract the filter membrane three times, each time for 20min, and transfer the sonicated aqueous solution to a new brown bottle. Add 400 μL and 1200 μL of 10 mol / L NaOH solution to ...

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Abstract

The invention belongs to the technical field of atmospheric chemical analysis, and discloses an analysis method for simultaneously collecting and detecting gas-phase and particle-phase organic amines in an atmospheric environment, which comprises the following steps of: firstly, simultaneously collecting the gas-phase and particle-phase organic amines in distilled water for ultrasonic extraction; and adding an inorganic alkaline solution and benzenesulfonyl chloride into the extract to derivatize organic amine in the sample; after derivatization, adding an inorganic alkaline solution again, cooling, adding a hydrochloric acid solution to adjust to an acidic solution, extracting the acidic solution by using dichloromethane, separating out an organic phase, and blow-drying in a nitrogen atmosphere to prepare derivatized organic amine; adding an n-hexane solution containing hexamethylbenzene into the derivatized organic amine to prepare an organic amine derivatized solution; and fixing the volume of the solution, and carrying out qualitative and quantitative analysis on the derivatization organic amine sample solution through a gas chromatograph-mass spectrometer. The method is simple to operate and low in cost, and gas-phase and particle-phase organic amine substances in the atmospheric environment can be collected and detected at the same time.

Description

technical field [0001] The invention belongs to the technical field of atmospheric chemical analysis, and more specifically relates to an analysis method for simultaneously collecting and detecting gas-phase and particle-phase organic amines in an atmospheric environment. Background technique [0002] Organic amines are one of the important components of organic nitrogen in the atmosphere. They not only widely exist in the atmospheric gas phase, but also exist in the atmosphere in the form of particles through phase transitions and chemical reactions. Organic amines are highly hazardous, toxic and often have an unpleasant odor. Frequent exposure to organic amines increases their human health risks. Not only does it affect human health, but it also plays an important role in atmospheric physical and chemical processes, such as the formation of new particles and brown carbon. Therefore, understanding the pollution characteristics and sources of gaseous and particulate organi...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/86
CPCG01N30/02G01N30/06G01N30/8675G01N2030/062
Inventor 安太成陈伊妃林钦浩李桂英
Owner GUANGDONG UNIV OF TECH
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