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Simultaneous determination of nine kinds of haloacetic acids in air pm2.5 fine particles

A technology of fine particles and haloacetic acid, applied in the field of environmental detection, achieves the effects of high toxicity, improved work efficiency, and convenient sample pretreatment

Active Publication Date: 2019-03-12
肖洋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Determination of the other eight haloacetic acids has hardly been reported

Method used

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  • Simultaneous determination of nine kinds of haloacetic acids in air pm2.5 fine particles
  • Simultaneous determination of nine kinds of haloacetic acids in air pm2.5 fine particles
  • Simultaneous determination of nine kinds of haloacetic acids in air pm2.5 fine particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] A PM2.5 sampling head equipped with an ultra-fine glass filter membrane is used to collect haloacetic acid samples in the atmosphere. The sampling head is composed of PM2.5 cutter, filter membrane and filter membrane holder, sampling cylinder filled with PUF and macroporous resin adsorbent, and silicone rubber sealing gasket. The cutting point of the PM2.5 cutter is 100L / min. The filter membrane uses ultra-fine glass filter membrane. Connect the sampling head to the high-load atmospheric characteristic pollutant sampler, set the gas sampling flow rate of the sampler to 100L / min to collect air, and collect samples 108m 3 . Remove the filter membrane from the sampling head after sampling.

[0078] Using methyl tert-butyl ether as a solvent to prepare nine kinds of concentrations of 10μg / L, 20μg / L, 50μg / L, 100μg / L, 200μg / L, 1000μg / L, 2000μg / L, 10000μg / L, 50000μg / L Haloacetic acid standard methyl tert-butyl ether solution. Take 5ml of the above standard solution into a...

Embodiment 2

[0095] The haloacetic acid samples in the atmosphere were collected with a PM2.5 sampling head equipped with a quartz fiber filter membrane. Connect the sampling head to the high-load atmospheric characteristic pollutant sampler, set the gas sampling flow rate of the sampler to 200L / min to collect air, and collect samples 108m 3 . After sampling, the quartz fiber filter membrane was desorbed with methyl tert-butyl ether, sealed and ultrasonically desorbed for 10 minutes at a low temperature of 1°C to complete the desorption of haloacetic acid, and the desorbed PUF and macroporous resin adsorbent were washed with a small amount of methyl tert-butyl ether Stir and squeeze with a glass rod. Combine the initial methyl tert-butyl ether stripping liquid and the washing liquid to form a stripping liquid, and dry it with a little anhydrous sodium sulfate. The volume of the stripping liquid is 5ml. All 5ml of the stripping solution was transferred to a stoppered test tube, 0.5ml of m...

Embodiment 3

[0098]The haloacetic acid samples in the atmosphere were collected with a PM2.5 sampling head equipped with a corundum filter membrane. Connect the sampling head to the high-load atmospheric characteristic pollutant sampler, set the gas sampling flow rate of the sampler to 225L / min to collect air, and collect samples of 108m 3 .

[0099] After sampling, the corundum filter membrane was desorbed with methyl tert-butyl ether, sealed and ultrasonically desorbed for 10 minutes at a low temperature of 2°C to complete the desorption of haloacetic acid, and the desorbed PUF and macroporous resin adsorbent were washed with a small amount of methyl tert-butyl ether and used Stir and extrude with a glass rod. Combine the initial methyl tert-butyl ether stripping liquid and the washing liquid to form a stripping liquid, and dry it with a little anhydrous sodium sulfate. The volume of the stripping liquid is 5ml. All the 5ml desorption solution was transferred to a stoppered test tube, ...

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Abstract

The invention belongs to the technical field of environment detection, and particularly relates to a method for simultaneously detecting nine haloacetic acids in PM2.5 fine particulate matters in the air. The method comprises the following steps: collecting a PM2.5 fine particulate matter sample in the air by utilizing a PM2.5 sampler, desorbing haloacetic acids in the sample by using methyl tert-butyl ether as a desorbing agent to obtain a desorption solution; adding methyl alcohol into the desorption solution, adding metal catalyst, metal porphyrin and benzenesulfonic phenolic resin to serve as a compound catalyst, performing water bath and magnetic stirring, cooling, transferring the material into a brown sample introduction bottle, performing gas chromatography to obtain the peak area of each substance, and calculating. The method can be used for simultaneously detecting multiple haloacetic acids in the PM2.5 fine particulate matters in the air in one time, and has the advantages of high precision, good accuracy and low detection limit.

Description

technical field [0001] The invention belongs to the technical field of environmental detection, and in particular relates to a method for simultaneously measuring nine kinds of haloacetic acids in air PM2.5 fine particles. Background technique [0002] Haloacetic acid compounds are important intermediates for the preparation of pesticides and organic synthesis, mainly including nine kinds: monochloroacetic acid, monobromoacetic acid, dichloroacetic acid, trichloroacetic acid, monobromochloroacetic acid, monobromodichloroacetic acid, dibromoacetic acid Acetic acid, monochlorodibromoacetic acid, tribromoacetic acid. Haloacetic acids have carcinogenic, teratogenic and deformable effects on the human body. PM2.5 is also known as particulate matter that can enter the lungs. It is difficult to discharge after entering the lungs with a small particle size, and it is very harmful. In addition, haloacetic acids have a high boiling point and mainly exist in the state of particulate m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/00G01N30/02
CPCG01N15/00G01N30/02
Inventor 王新娟肖洋郝亮韩伟
Owner 肖洋