Air odor intensity grade detection method based on electronic nose

Abstract

The invention discloses an air odor intensity grade detection method based on an electronic nose. The method includes the steps: (1) establishment of sensory intensity grade standards for standard odorous gas; (2) preparation of an odorous gas standard intensity grade test sample; (3) detection of odorous gas under sensory intensity grade standards by the electronic nose, screening of an electronic nose sensor and establishment of a standard curve; (4) detection of the air sample by the electronic nose; and (5) statistical analysis of the test results and obtaining of detection results. Compared with the prior art, the method utilizes the electronic nose for detecting the air odor, can effectively reduce the physical injury of smelling workers exposed to the odor air for a long time, alsocan effectively reduce the fluctuation of the evaluation of the air odor intensity due to the own physical condition fluctuation of the smelling workers, thereby improving the accuracy of evaluation detection. Furthermore, the method has the advantages of fast sample detection speed, convenient operation and the like.

Description

technical field [0001] The invention relates to an electronic nose-based method for detecting air odor intensity levels. Background technique [0002] In recent years, with the continuous improvement of my country's industrialization level and rapid economic development, the air problems caused by this have gradually become prominent. There are many sources of odorous gases in the air, mainly from a large amount of domestic garbage produced in human daily life, including odorous substances produced in agricultural production, livestock breeding, and various types of garbage and waste gas emitted in industrial production processes, especially chemical industry. In industry, pollution sources include not only direct discharge, but also sewage and waste disposal, and indirect pollution to soil and groundwater. There are many kinds of odors, among which the ones that are more harmful to human health are ammonia, carbon disulfide, hydrogen sulfide, methyl mercaptan and trimethyl...

AI Technical Summary

Problems solved by technology

[0003] However, this detection method by sniffers has the following disadvantages: (1) The sniffers will fluctuate in the evaluation of the air odor intensity at different times due to their own physical condition fluctuations, which will affect the detection results to a certain extent. accuracy

(2) Sniffers are exposed to irritating smell air for a long time, and the nervous system will always be tense, causing the cerebral cortex to fail to work, resulting in olfactory nervous system disorder and even loss of smell; after the human body is stimulated by the odor, the brain will automatically respond to breathing The system adjusts to reduce the amount of breathing, which will cause great damage to the respiratory system or even cause death; some odor components will cause damage to the visual system or skin surface. Circulatory system, digestive system, endocrine system, etc. will all have negative effects

Therefore, sensory evaluation has certain potential safety hazards for the health of sniffers

(3) It takes a large number of sniffers (more than 6 people) and detection time (2-3 hours) to detect the intensity of air odor by sniffers, so the cost is high and it is difficult to widely popularize

At present, electronic noses have been researched and applied in the field of food industry, biomedical and other fields to distinguish samples, but the research and application in the level detection of air quality is not deep.

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