CN114235796A - Environment-friendly method for evaluating effect of formaldehyde purifying agent - Google Patents
Environment-friendly method for evaluating effect of formaldehyde purifying agent Download PDFInfo
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- CN114235796A CN114235796A CN202111551930.2A CN202111551930A CN114235796A CN 114235796 A CN114235796 A CN 114235796A CN 202111551930 A CN202111551930 A CN 202111551930A CN 114235796 A CN114235796 A CN 114235796A
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 336
- 230000000694 effects Effects 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000012629 purifying agent Substances 0.000 title claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 56
- 239000000523 sample Substances 0.000 claims description 34
- 239000012496 blank sample Substances 0.000 claims description 17
- 239000002516 radical scavenger Substances 0.000 claims description 13
- 239000011094 fiberboard Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 230000007613 environmental effect Effects 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000003153 chemical reaction reagent Substances 0.000 claims description 4
- 238000003618 dip coating Methods 0.000 claims description 4
- 239000012153 distilled water Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000036541 health Effects 0.000 abstract description 5
- 238000004887 air purification Methods 0.000 abstract description 3
- 239000008098 formaldehyde solution Substances 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 239000012459 cleaning agent Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000357 carcinogen Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Engineering & Computer Science (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention relates to the field of air purification, and aims to provide an environment-friendly method for evaluating the effect of a formaldehyde purifying agent; compared with the existing detection method, the method has the advantages of convenience in operation, short test period, wide test range, low cost and the like, does not need precise and expensive instruments, does not need manual injection of formaldehyde solution, has little harm to the body health of testers, and does not pollute the environment; the method can test the removal rate of the air purifying product to formaldehyde and can test the attenuation rate of the product, thereby judging the durability of the purifying effect, objectively evaluating the actual application effect of the air purifying agent and having great significance for treating indoor formaldehyde.
Description
Technical Field
The invention relates to the technical field of environmental purification products, in particular to an environment-friendly method for evaluating the effect of a formaldehyde purifying agent.
Background
In recent years, with the improvement of the living standard of people and the change of living concepts, house decoration is increasingly common, and the problem of indoor environmental air pollution caused by decoration is increasingly serious. Formaldehyde has a significant hazard to human health, and the toxic effect on human body relates to multiple systems, multiple organs, and is classified as a potential carcinogen and an important environmental pollutant by the World Health Organization (WHO) and the Environmental Protection Agency (EPA). According to investigation, more than 70% of urban and rural residents in China live indoors, and the quality of indoor air directly influences the body health of people; particularly, the new crown epidemic situation is popular in the two years, and unprecedented attention of people on 'indoor environment' and 'healthy breathing' is brought forward. Many formaldehyde control companies appear like bamboo shoots after rain, and formaldehyde products on the market are various and numerous, and various gimmicks are not counted. Many governing companies do not know the product and do not have corresponding detection means to verify the stability of the product quality, and the product is basically sent to a third party for detection, but the cost is high and the time is long.
At present, an environment chamber method is selected as a mainstream detection method, but when the formula of an air purification product is selected and the effect is compared and detected, the environment chamber test method has limitations, such as poor selection of an experiment place, difficult control of room air conditions, poor experiment reproducibility and difficulty in carrying out a large number of comparison experiments simultaneously. Other testing methods are limited to certain products (formaldehyde scavengers) and are not suitable for all air purifiers (such as nano titanium dioxide and the like) on the market.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an environment-friendly method for evaluating the effect of a formaldehyde purifying agent, and accordingly, the formaldehyde removing effect and the durability of the effect of various formaldehyde purifying agent products are judged.
In order to achieve the purpose, the invention is realized by the following technical scheme:
an environment-friendly method for evaluating the effect of a formaldehyde purifying agent comprises the following steps:
(1) marking: marking the medium-density fiberboard by using a marking pen, wherein the marking pen comprises the following steps: blank sample and test sample;
(2) sealing treatment: adding an aqueous formaldehyde sealant into the plastic box, adding the blank sample and the test sample obtained in the step (1), dip-coating for 20-30 seconds, taking out, drying in the air, and standing for 24 hours for later use;
(3) and (3) purification treatment: adding a formaldehyde purifying agent into the plastic box, putting the test sample subjected to sealing treatment in the step (2), dip-coating for 20-30 seconds, taking out, airing, and standing for more than 48 hours for later use;
(4) and (3) testing: preparing two portions of distilled water containing phenol reagent, shaking uniformly, and pouring into two plastic covers; covering different plastic covers with the blank sample subjected to sealing treatment in the step (2) and the test sample subjected to purification treatment in the step (3), pouring the sample absorption liquid into the test tube after 30-40 min, adding a color developing agent, heating for 5min, and testing the formaldehyde concentrations of the different sample absorption liquids to obtain the formaldehyde concentrations of the blank sample and the test sample;
(5) calculating the removal rate:
formaldehyde removal rate ═ (formaldehyde concentration of blank-formaldehyde concentration of test sample)/formaldehyde concentration of blank 100%;
(6) calculating the attenuation rate:
and (3) after the test sample in the step (3) is placed for 48 hours, continuing to place for n days, repeating the step (4) to obtain the formaldehyde concentration of the blank sample (n days) and the formaldehyde concentration of the test sample (n days), and calculating the attenuation rate of the purifying agent according to the following formula:
formaldehyde removal rate (n days) (formaldehyde concentration of blank (n days) — formaldehyde concentration of test sample (n days))/formaldehyde concentration of blank (n days) × 100%,
The decay rate (n days) — (formaldehyde removal rate-formaldehyde removal rate (n days))/formaldehyde removal rate 100.
Optionally, the medium density fiberboard in the step (1) is grade E0, and the sizes of the medium density fiberboard are all 100mm by 5 mm.
Optionally, the plastic box size in steps (2) and (3) is 180mm by 110mm by 5 mm.
Optionally, the size of the plastic cover in step (4) is 80mm x 50 mm.
Optionally, the addition amount of the formaldehyde scavenger in the step (3) is 300 ml.
Alternatively, a room formaldehyde tester was used to test the concentration of formaldehyde.
Compared with the prior art, the invention has the following beneficial effects:
(1) during testing, only an indoor formaldehyde tester is used, and a formaldehyde analysis pure solution is not needed for drawing a standard curve, so that the environment is not polluted; in the whole testing process, a tester does not contact the formaldehyde analysis pure solution, and the harm to the health is small;
(2) a large number of comparison tests can be carried out simultaneously, which has a great guiding function on formula selection and effect comparison detection of air purification products and can not be realized by testing formaldehyde by an environmental chamber method;
(3) the formaldehyde release concentration of the E0-grade medium density fiberboard is equivalent to the actual concentration in a room, so that the removal rate of the air purifying product can be tested, the durability of the purifying effect of the product can be tested, and the actual application effect of the air purifying agent can be objectively evaluated; the method has great significance for actual air treatment on site;
(4) extremely low cost, no need of precise and expensive instruments.
(5) Convenient operation, short test period and wide test range.
Drawings
FIG. 1 is a graph of formaldehyde concentration for test samples treated with different formaldehyde scavengers;
FIG. 2 is a graph of formaldehyde removal rates for test samples treated with different formaldehyde scavengers;
FIG. 3 is a graph showing the decay rate of the formaldehyde-removing effect of different formaldehyde scavengers.
Detailed Description
The invention is further described below with reference to the drawings and examples, but the scope of the invention as claimed is not limited to the scope of the examples.
Example 1
An environment-friendly method for evaluating the effect of a formaldehyde purifying agent comprises the following steps:
(1) marking: taking the same batch of E0 medium density fiberboard with the specification of 100mm by 5mm, marking the medium density fiberboard by a marking pen, and respectively: blank sample and test sample;
(2) sealing treatment: preparing 2 plastic boxes, adding 300ml of water-based formaldehyde sealant, then respectively adding the blank sample and the test sample in the step (1), dipping for 20 seconds, taking out, airing, and standing for 24 hours for later use;
(3) and (3) purification treatment: adding 1300 ml of formaldehyde purifying agent into the plastic box, putting the test sample subjected to sealing treatment in the step (2), taking out after dipping for 20 seconds, airing, and standing for more than 48 hours for later use;
(4) and (3) testing: preparing two phenol reagents (0.25mg), adding distilled water to 10ml, shaking uniformly, and pouring into a cylindrical plastic cover with the specification of phi 50mm x 15 mm; covering different plastic covers with the blank sample subjected to sealing treatment in the step (2) and the test sample subjected to purification treatment in the step (3) respectively to enable distilled water containing a phenol reagent to absorb volatilized formaldehyde, pouring the sample absorption liquid absorbing the formaldehyde into a test tube after 30min, adding a color developing agent, heating for 5min, and then testing the formaldehyde concentration of different sample absorption liquids by using an indoor formaldehyde tester to obtain the formaldehyde concentration of the blank sample and the formaldehyde concentration of the test sample;
(5) calculating the removal rate:
formaldehyde removal rate ═ (formaldehyde concentration of blank-formaldehyde concentration of test sample)/formaldehyde concentration of blank 100%;
(6) calculating the attenuation rate:
and (3) after the test sample in the step (3) is placed for 48 hours, continuing to place for n days, repeating the step (4) to obtain the formaldehyde concentration of the blank sample (n days) and the formaldehyde concentration of the test sample (n days), and calculating the attenuation rate of the purifying agent according to the following formula:
formaldehyde removal rate (n days) (formaldehyde concentration of blank (n days) — formaldehyde concentration of test sample (n days))/formaldehyde concentration of blank (n days) × 100%,
The decay rate (n days) — (formaldehyde removal rate-formaldehyde removal rate (n days))/formaldehyde removal rate 100.
Example 2
The formaldehyde scavenger 1 was replaced by the formaldehyde scavenger 2, and the other steps and processes were the same as in example 1.
Example 3
The formaldehyde scavenger 1 was replaced with the formaldehyde scavenger 3, and the other steps and processes were the same as in example 1.
Example 4
The formaldehyde scavenger 1 was replaced with the formaldehyde scavenger 4, and the other steps and processes were the same as in example 1.
Wherein, the formaldehyde concentration of the blank sample and the formaldehyde concentration of the test sample need to be tested at the same time; the formaldehyde removal rate in the step (5) is the initial formaldehyde removal rate, namely the formaldehyde removal rate of the day 3; in practice, the decay rate (n days) in step (6) is (initial formaldehyde removal rate-formaldehyde removal rate on n days)/initial formaldehyde removal rate 100%.
The principle of the formaldehyde testing method is GB/T18204.2-2014 public place sanitation inspection method second part: chemical pollutants and GB/T35239-2017 test method for removing capability of formaldehyde scavenger for artificial boards and products thereof.
In fact, in the embodiments 1 to 4, the test is performed at the same time, and only a plurality of test samples need to be marked in the step (1).
The formaldehyde concentrations in examples 1-4 were collated to obtain the following data:
TABLE 1 Formaldehyde concentration Table for different formaldehyde scavengers as a function of time (mg/m)3)
| Time | Day 3 | Day 7 | Day 15 |
| Blank sample | 0.197 | 0.249 | 0.094 |
| Cleaning agent 1 | 0.033 | 0.116 | 0.091 |
| Cleaning agent 2 | 0.035 | 0.076 | 0.089 |
| Cleaning agent 3 | 0.101 | 0.144 | 0.071 |
| Purifying agent 4 | 0.031 | 0.045 | 0.061 |
TABLE 2 formaldehyde removal (%), as a function of time, of different formaldehyde scavengers
| Time | Day 3 | Day 7 | Day 15 |
| Cleaning agent 1 | 83.249 | 53.414 | 2.123 |
| Cleaning agent 2 | 82.234 | 69.478 | 5.319 |
| Cleaning agent 3 | 48.731 | 42.169 | 24.468 |
| Purifying agent 4 | 84.264 | 81.928 | 35.106 |
TABLE 3 decay Rate (%) of different formaldehyde scavengers with time
| Time | Day 7 | Day 15 |
| Cleaning agent 1 | 35.838 | 97.444 |
| Cleaning agent 2 | 15.511 | 93.532 |
| Cleaning agent 3 | 13.466 | 49.789 |
| Purifying agent 4 | 2.773 | 58.338 |
To sum up: according to the environment-friendly method for evaluating the effect of the formaldehyde purifying agent, a formaldehyde solution is not used in the whole testing process; the formaldehyde removing effect of various formaldehyde purifiers can be tested simultaneously, and the attenuation rate of the formaldehyde purifiers can be calculated by testing the formaldehyde concentration in different time periods; the invention can objectively evaluate the actual application effect of the air purifying agent, has good reproducibility and has great significance for verifying the action effect of the formula by an air purifying agent manufacturer.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention. The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (6)
1. An environment-friendly method for evaluating the effect of a formaldehyde purifying agent is characterized by comprising the following steps:
(1) marking: marking the medium-density fiberboard by using a marking pen, wherein the marking pen comprises the following steps: blank sample and test sample;
(2) sealing treatment: adding an aqueous formaldehyde sealant into the plastic box, adding the blank sample and the test sample obtained in the step (1), dip-coating for 20-30 seconds, taking out, drying in the air, and standing for 24 hours for later use;
(3) and (3) purification treatment: adding a formaldehyde purifying agent into the plastic box, putting the test sample subjected to sealing treatment in the step (2), dip-coating for 20-30 seconds, taking out, airing, and standing for more than 48 hours for later use;
(4) and (3) testing: preparing two portions of distilled water containing phenol reagent, shaking uniformly, and pouring into two plastic covers; covering different plastic covers with the blank sample subjected to sealing treatment in the step (2) and the test sample subjected to purification treatment in the step (3), pouring the sample absorption liquid into the test tube after 30-40 min, adding a color developing agent, heating for 5min, and testing the formaldehyde concentrations of the different sample absorption liquids to obtain the formaldehyde concentrations of the blank sample and the test sample;
(5) calculating the removal rate:
formaldehyde removal rate ═ (formaldehyde concentration of blank-formaldehyde concentration of test sample)/formaldehyde concentration of blank 100%;
(6) calculating the attenuation rate:
and (3) after the test sample in the step (3) is placed for 48 hours, continuing to place for n days, repeating the step (4) to obtain the formaldehyde concentration of the blank sample (n days) and the formaldehyde concentration of the test sample (n days), and calculating the attenuation rate of the purifying agent according to the following formula:
formaldehyde removal rate (n days) (formaldehyde concentration of blank (n days) — formaldehyde concentration of test sample (n days))/formaldehyde concentration of blank (n days) × 100%,
The decay rate (n days) — (formaldehyde removal rate-formaldehyde removal rate (n days))/formaldehyde removal rate 100.
2. The environmental method for evaluating the effect of formaldehyde scavenger according to claim 1, wherein the medium density fiberboard of step (1) is grade E0, and each of the medium density fiberboard has a size of 100mm by 5 mm.
3. The method of claim 1, wherein the size of the plastic box in steps (2) and (3) is 180mm by 110mm by 5 mm.
4. The environmental friendly method for evaluating the effect of formaldehyde scavenger according to claim 1, wherein the size of the plastic cover in step (4) is 80mm x 50 mm.
5. The method for evaluating the effect of the formaldehyde scavenger in an environmental protection manner as recited in claim 1, wherein the amount of the formaldehyde scavenger added in the step (3) is 300 ml.
6. The environmental-friendly method for evaluating the effect of the formaldehyde scavenger as recited in claim 1, wherein the concentration of formaldehyde is measured by using an indoor formaldehyde tester.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10197511A (en) * | 1997-01-07 | 1998-07-31 | Ohbayashi Corp | Analyzing method for formaldehyde in air |
| CN105242009A (en) * | 2015-09-24 | 2016-01-13 | 叶氏化工研发（上海）有限公司 | Method used for detecting air purifying material purification efficiency |
| CN106841056A (en) * | 2016-11-24 | 2017-06-13 | 上海朗绿建筑科技股份有限公司 | A kind of detection method of formaldehyde content in indoor air |
| CN107525801A (en) * | 2017-07-17 | 2017-12-29 | 贵州金洋检测工程有限公司 | A kind of formaldehyde in air content assaying method |
| CN112924398A (en) * | 2019-12-05 | 2021-06-08 | 济南绿豆侠环保科技有限公司 | Method for evaluating formaldehyde purifying performance of formaldehyde scavenger with high precision |
| CN113740492A (en) * | 2021-08-31 | 2021-12-03 | 几何智慧城市科技(广州)有限公司 | Method for testing formaldehyde removal effect of air purifying agent |
-
2021
- 2021-12-17 CN CN202111551930.2A patent/CN114235796A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10197511A (en) * | 1997-01-07 | 1998-07-31 | Ohbayashi Corp | Analyzing method for formaldehyde in air |
| CN105242009A (en) * | 2015-09-24 | 2016-01-13 | 叶氏化工研发（上海）有限公司 | Method used for detecting air purifying material purification efficiency |
| CN106841056A (en) * | 2016-11-24 | 2017-06-13 | 上海朗绿建筑科技股份有限公司 | A kind of detection method of formaldehyde content in indoor air |
| CN107525801A (en) * | 2017-07-17 | 2017-12-29 | 贵州金洋检测工程有限公司 | A kind of formaldehyde in air content assaying method |
| CN112924398A (en) * | 2019-12-05 | 2021-06-08 | 济南绿豆侠环保科技有限公司 | Method for evaluating formaldehyde purifying performance of formaldehyde scavenger with high precision |
| CN113740492A (en) * | 2021-08-31 | 2021-12-03 | 几何智慧城市科技(广州)有限公司 | Method for testing formaldehyde removal effect of air purifying agent |
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