Formaldehyde detection method

Abstract

The invention discloses a formaldehyde detection method. The formaldehyde detection method comprises the following steps: 1, collecting an air sample; step 2, extracting formaldehyde gas; 3, measuring the formaldehyde concentration; 4, formaldehyde data analysis and report generation; a detected object is placed in a detection chamber, all window valves in the detection chamber are closed, a closed space is formed in the detection chamber at normal temperature, and a specially designed air sampler is used for regularly collecting indoor air and collecting a certain amount of air samples; the air suction assembly is used for extracting air in the detection chamber within set time, then formaldehyde gas is extracted from a collected air sample through special chemical substances, and then the content of formaldehyde in the extracted air is detected. The formaldehyde gas extraction process is rapid and accurate, and errors of a traditional detection method are effectively avoided; the measuring instrument is high in precision, can display the formaldehyde concentration value in real time, and is convenient for a user to master indoor air quality.

Description

Technical Field

[0001] The invention relates to the technical field of formaldehyde detection applications, in particular to a formaldehyde detection method. Background Art

[0002] As people's living standards improve, their requirements for the health of their home environment are getting higher and higher. Formaldehyde is a common indoor air pollutant, and its impact on human health cannot be ignored. Formaldehyde is a colorless, harmful gas that irritates the eyes and nose. Its aqueous solution is what we often call formalin. Formaldehyde is generally used as a pesticide and disinfectant, and is also used as a raw material for making phenolic resins, urea-formaldehyde resins, vinylon and dyes. Long-term exposure to high concentrations of formaldehyde may have serious effects on human health, including respiratory problems, immune system suppression, and may even cause cancer. Therefore, it is important to understand and master an effective formaldehyde detection method. Summary of the invention

[0003] The object of the present invention is to provide a formaldehyde detection method to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: a formaldehyde detection method, comprising step 1, collecting air samples; step 2, extracting formaldehyde gas; step 3, measuring formaldehyde concentration; step 4, formaldehyde data analysis and report generation;

[0005] In the above step 1, the test object is placed in the test room, and all window valves in the test room are closed. The test room forms a closed space at room temperature, and a specially designed air sampler is used to collect indoor air at regular intervals to collect a certain amount of air samples;

[0006] In the above step 2, the air suction component extracts the gas in the detection room at a set time, then extracts the formaldehyde gas from the collected air sample through special chemicals, and then detects the formaldehyde content of the extracted gas;

[0007] In the above step 3, the gas extracted in step 2 is input into a corresponding precision instrument for detection, so that the precision instrument measures the content of the extracted formaldehyde gas to obtain the formaldehyde concentration value;

[0008] In the above step 4, the data measured by the precision instrument in step 3 are collated and recorded, and the measured formaldehyde concentration value is compared with the standard value to obtain an indoor air quality assessment report.

[0009] Preferably, the specific operation steps in step 1 include the following:

[0010] S1. Sampling preparation: Choose a sunny and windless day for testing, close the doors and windows for 12 hours to ensure that the indoor air is still, and prepare necessary tools such as sampling tubes, collection clamps, sampling test papers, sealing films, etc.

[0011] S2. Sampling points: Determine the number of sampling points based on the area of ​​the room. Generally, households can choose to place a sampling point in each of the four diagonal corners and the middle of the room.

[0012] S3. Sampling operation: Fix the collection clip on the doors and windows, put the sampling test paper into the collection clip, ensure that the test paper is in full contact with the indoor air, and sample each sampling point continuously for 5-7 days, with sampling hours per day.

[0013] Preferably, in step 2, the sampling test paper of each sampling point is placed in the corresponding sampling tube, and the collected sampling tubes are processed as required, sealed and stored, and sent to a professional laboratory for testing in a timely manner, so as to understand the indoor air quality as soon as possible.

[0014] Preferably, in step three, the formaldehyde content at different positions can be detected to obtain the formaldehyde content at different distances, which can guide people to keep a certain distance from the test object to reduce the harm of formaldehyde, especially furniture. The detection is more comprehensive, and the gas at different heights is extracted to detect the changes in formaldehyde content at different heights.

[0015] Preferably, the sampling operation is strictly followed in step 2 to ensure that the sampling test paper is in full contact with the indoor air to avoid deviation in the test results due to improper operation.

[0016] Preferably, the data analysis and reporting system in step 4 is intelligent and can automatically generate an indoor air quality assessment report, making it convenient for users to understand the environmental conditions of indoor formaldehyde.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The formaldehyde detection method of the present invention can be applied to indoor environments such as homes, offices, and schools. Through regular detection, users can timely understand the indoor formaldehyde concentration, take corresponding measures to reduce the formaldehyde content, and protect human health. It can also be applied to formaldehyde detection work in environmental protection departments, building decoration industries, and other fields. The sampling of the present invention is convenient, and multi-point sampling can be performed at different locations indoors to improve the detection accuracy. The formaldehyde gas extraction process is fast and accurate, effectively avoiding the error of traditional detection methods. The measuring instrument has high accuracy and can display the formaldehyde concentration value in real time, which is convenient for users to grasp the indoor air quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the method flow of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] See also Figure 1 , an embodiment provided by the present invention:

[0024] Example 1

[0025] A formaldehyde detection method, comprising step 1, collecting air samples; step 2, extracting formaldehyde gas; step 3, measuring formaldehyde concentration; step 4, formaldehyde data analysis and report generation;

[0026] In the above step 1, the test object is placed in the test room, and all window valves in the test room are closed. The test room forms a closed space at room temperature, and a specially designed air sampler is used to collect indoor air at regular intervals to collect a certain amount of air samples;

[0027] In the above step 2, the air suction component extracts the gas in the detection room at a set time, then extracts the formaldehyde gas from the collected air sample through special chemicals, and then detects the formaldehyde content of the extracted gas;

[0028] In the above step 3, the gas extracted in step 2 is input into a corresponding precision instrument for detection, so that the precision instrument measures the content of the extracted formaldehyde gas to obtain the formaldehyde concentration value;

[0029] In the above step 4, the data measured by the precision instrument in step 3 are collated and recorded, and the measured formaldehyde concentration value is compared with the standard value to obtain an indoor air quality assessment report.

[0030] Preferably, the specific operation steps in step 1 include the following:

[0031] S1. Sampling preparation: Choose a sunny and windless day for testing, close the doors and windows for 12 hours to ensure that the indoor air is still, and prepare necessary tools such as sampling tubes, collection clamps, sampling test papers, sealing films, etc.

[0032] S2. Sampling points: Determine the number of sampling points based on the area of ​​the room. Generally, households can choose to place a sampling point in each of the four diagonal corners and the middle of the room.

[0033] S3. Sampling operation: Fix the collection clip on the doors and windows, put the sampling test paper into the collection clip, ensure that the test paper is in full contact with the indoor air, and sample each sampling point continuously for 5-7 days, with sampling hours per day.

[0034] Example 2

[0035] In the step 2, the sampling test paper of each sampling point is placed in the corresponding sampling tube, and the collected sampling tubes are processed as required, sealed and stored, and sent to a professional laboratory for testing in time, so as to understand the indoor air quality as soon as possible; in the step 3, the formaldehyde content at different positions can be tested to obtain the formaldehyde content at different distances, which can guide people to keep a certain distance from the test object to reduce the harm of formaldehyde, especially furniture, and the test is more comprehensive, and the gas at different heights is extracted to detect the changes in formaldehyde content at different heights; in the step 2, the sampling operation is strictly followed to ensure that the sampling test paper is in full contact with the indoor air to avoid deviations in the test results due to improper operation; the data analysis and reporting system in the step 4 is intelligent, and can automatically generate an indoor air quality assessment report, which is convenient for users to understand the environmental conditions of indoor formaldehyde.

[0036] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

[0037] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified and replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A formaldehyde detection method, comprising step 1, collecting air samples; step 2, extracting formaldehyde gas; step 3, measuring formaldehyde concentration; step 4, formaldehyde data analysis and report generation; characterized in that: In the above step 1, the test object is placed in the test room, and all window valves in the test room are closed. The test room forms a closed space at room temperature, and a specially designed air sampler is used to collect indoor air at regular intervals to collect a certain amount of air samples; In the above step 2, the air suction component extracts the gas in the detection room at a set time, then extracts the formaldehyde gas from the collected air sample through special chemicals, and then detects the formaldehyde content of the extracted gas; In the above step 3, the gas extracted in step 2 is input into a corresponding precision instrument for detection, so that the precision instrument measures the content of the extracted formaldehyde gas to obtain the formaldehyde concentration value; In the above step 4, the data measured by the precision instrument in step 3 are collated and recorded, and the measured formaldehyde concentration value is compared with the standard value to obtain an indoor air quality assessment report.

2. A formaldehyde detection method according to claim 1, characterized in that: The specific operation steps in step 1 include the following: S1. Sampling preparation: Choose a sunny and windless day for testing, close the doors and windows for 12 hours to ensure that the indoor air is still, and prepare necessary tools such as sampling tubes, collection clamps, sampling test papers, sealing films, etc. S2. Sampling points: Determine the number of sampling points based on the area of ​​the room. Generally, households can choose to place a sampling point in each of the four diagonal corners and the middle of the room. S3. Sampling operation: Fix the collection clip on the doors and windows, put the sampling test paper into the collection clip, ensure that the test paper is in full contact with the indoor air, and sample each sampling point continuously for 5-7 days, with sampling hours per day.

3. A formaldehyde detection method according to claim 1, characterized in that: In the step 2, the sampling test paper of each sampling point is placed in the corresponding sampling tube, and the collected sampling tubes are processed as required, sealed and stored, and sent to a professional laboratory for testing in a timely manner so as to understand the indoor air quality as soon as possible.

4. A formaldehyde detection method according to claim 1, characterized in that: In the step three, the formaldehyde content at different positions can be tested to obtain the formaldehyde content at different distances, which can guide people to keep a certain distance from the test object to reduce the harm of formaldehyde, especially furniture. The test is more comprehensive, and the gas at different heights is extracted to detect the changes in formaldehyde content at different heights.

5. A formaldehyde detection method according to claim 1, characterized in that: In step 2, the sampling operation is strictly followed to ensure that the sampling test paper is in full contact with the indoor air to avoid deviation in the test results due to improper operation.

6. A formaldehyde detection method according to claim 1, characterized in that: The data analysis and reporting system in step 4 is intelligent and can automatically generate an indoor air quality assessment report, making it convenient for users to understand the environmental conditions of indoor formaldehyde.

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