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Sampling sheet and sampling method for sampling analysis of SO2 in atmosphere

A sampling analysis and sampling sheet technology, applied in the sampling field of the above-mentioned sampling sheet, can solve the problems of affecting the absorption of absorbing liquid, affecting the accuracy of test results, general water retention performance of paste, etc., to ensure sufficient absorption, excellent water absorption performance and Water retention performance, the effect of improving surface wetting performance

Active Publication Date: 2014-05-14
CHINA NAT ELECTRIC APP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the paste made of tragacanth gum has general water retention performance, which will cause conjunctiva on the surface of the sampling piece due to water loss, which will affect the absorption of SO in the atmosphere by the absorption liquid. 2 Absorption, affecting the accuracy of test results

Method used

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  • Sampling sheet and sampling method for sampling analysis of SO2 in atmosphere
  • Sampling sheet and sampling method for sampling analysis of SO2 in atmosphere
  • Sampling sheet and sampling method for sampling analysis of SO2 in atmosphere

Examples

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Effect test

Embodiment 1

[0034] The present embodiment is used for SO in the atmosphere 2 The preparation steps of the sampling sheet for sampling analysis are as follows:

[0035](a) Under the cold water bath, acrylic acid and sodium hydroxide solution are stirred and mixed uniformly at a molar ratio of 1:1 to obtain a sodium acrylate solution; in the sodium acrylate solution, acrylamide is added, and the mass ratio of acrylamide to sodium acrylate is 1: 3; form a monomer solution after dissolving evenly; (b) add N,N-methylenebisacrylamide as a crosslinking agent and 4,4'-azobis( 4-cyanovaleric acid) and as SO 2 Stir and dissolve the potassium carbonate solution of the absorbent; (c) add glycerin to the above solution as a humectant, and stir evenly to prepare a reaction solution; (d) take a petri dish made of polyethylene with a diameter of 8 cm, and mix it with the petri dish The filter paper with suitable size is fully wetted with acetone and pasted on the bottom of the petri dish. After drying ...

Embodiment 2

[0055] The present embodiment is used for SO in the atmosphere 2 The preparation steps of the sampling sheet for sampling analysis are as follows:

[0056] (a) Under the cold water bath, acrylic acid and sodium hydroxide solution are stirred and mixed uniformly at a molar ratio of 1:1 to obtain a sodium acrylate solution; in the sodium acrylate solution, acrylamide is added, and the mass ratio of acrylamide to sodium acrylate is 1: 5; form a monomer solution after dissolving evenly; (b) add N,N-methylenebisacrylamide as a crosslinking agent and 4,4'-azobis( 4-cyanovaleric acid) and as SO 2 The potassium carbonate solution of the absorbent is stirred and dissolved; (c) then, propylene glycol is added to the above solution as a humectant, and stirred evenly to prepare a reaction solution; (d) take a petri dish made of polyethylene with a diameter of 10 cm, and mix it with the petri dish The filter paper with suitable size is fully wetted with acetone and pasted on the bottom o...

Embodiment 3

[0059] The present embodiment is used for SO in the atmosphere 2 The preparation steps of the sampling sheet for sampling analysis are as follows:

[0060] (a) Under the cold water bath, acrylic acid and sodium hydroxide solution are stirred and mixed uniformly at a molar ratio of 1:1 to obtain a sodium acrylate solution; in the sodium acrylate solution, acrylamide is added, and the mass ratio of acrylamide to sodium acrylate is 1: 6; form a monomer solution after dissolving evenly; (b) add N,N-methylenebisacrylamide as a crosslinking agent and 4,4'-azobis( 4-cyanovaleric acid) and as SO 2 The sodium carbonate solution of absorbent is stirred and dissolved; (c) then, propylene glycol is added in the above solution as a humectant, and stirred evenly to prepare a reaction solution; (d) take a petri dish made of polyethylene with a diameter of 12 cm, and mix it with the petri dish The filter paper with appropriate size is fully wetted with acetone and pasted on the bottom of th...

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Abstract

The invention provides a sampling sheet for sampling analysis of SO2 in atmosphere, and the sampling sheet is prepared by virtue of the following steps: (a) adding acrylamide into a sodium acrylate solution to form a monomer solution; (b) adding a crosslinking agent, an initiator and an SO2 adsorbent and stirring for dissolution; (c) adding a humectant and stirring uniformly to obtain a reaction solution; (d) fetching a polyethylene petri dish, sufficiently wetting the filter paper matched with the size of the petri dish by use of acetone, and pasting at the bottom of the petri dish; airing the petri dish, and pouring the reaction solution into the petri dish; preserving heat in an oven at 60 DEG C for 3 hours to obtain the sampling sheet. The invention also provides a sampling method for sampling analysis of SO2 in atmosphere by use of the sampling sheet. The sampling sheet and sampling method provided by the invention are closer to the practical situation of material corrosion, and thus can be better used for analyzing the atmospheric corrosion behavior of the material; moreover, the water retaining property of the sampling sheet in the sampling period is guaranteed, so that sufficient absorption of SO2 by absorption liquid in the sampling sheet is guaranteed, and the accuracy of the test result is improved.

Description

technical field [0001] The invention relates to a method for treating SO in the atmosphere 2 A sampling sheet for sampling and analysis, and the present invention also relates to a sampling method for the sampling sheet. Background technique [0002] SO in the atmosphere 2 It will have a significant impact on the atmospheric corrosion of metals, and the atmospheric SO 2 Long-term monitoring of the content is very necessary. while SO 2 The sampling method is very important to the accuracy, reproducibility and reliability of the test results, and has become the research focus of the industry at home and abroad. [0003] The commonly used methods for collecting air pollutants in atmospheric exposure test sites are generally divided into three categories: direct sampling method, solution absorption method, and filter membrane sampling method. Traditional SO 2 The sampling method is the solution absorption method. This method is to make a large amount of air pass through t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/56C08F222/38C08F2/44C08K13/02C08K3/26C08K5/053G01N1/22
Inventor 冯皓胡利芬郭燕芬刘鑫
Owner CHINA NAT ELECTRIC APP RES INST