What is the indoor formaldehyde detection index value, and how to measure it yourself

National standard for formaldehyde emissions: 1The maximum allowable concentration of formaldehyde in indoor air is milligrams of cubic meters.

It must be difficult to measure very accurately, you can find a company like SGS that specializes in formaldehyde testing.

Nanchang formaldehyde detection standard value applies to two standards, one is to move into the new decoration environment of the office using GB 18883, formaldehyde content needs to be, one is the rough room delivery use GB 50325, formaldehyde content in, at present, Nanchang has this testing qualification There are three, namely Jiangxi Normal University Stanford Environmental Protection, Nanchang Environmental Monitoring Station and Jiangxi Provincial Analysis and Testing Center.

According to the provisions of the national standard 18883, the standard value of formaldehyde at home is within milligrams and cubic meters, and it is closed for 12 hours for testing, and it is recommended to test the indoor temperature above 23 degrees.

Formaldehyde detection has national standards that can be followed, the detection principle is actually very simple, the most commonly used in the laboratory is also particularly suitable for measuring indoor formaldehyde is the phenol reagent method, the conditional will use chromatography, the instrument is more expensive than the cost of detection.

In 2019, CCTV also reported that most of the detectors on the market are inaccurate or have a large error, and even the detection of many exceeding the standard is not exceeded, formaldehyde is still very harmful, life is only once, how important and happy health is, and how sympathetic it is to see so many water drops.

I will share what I have learned with you, I hope it will be helpful to you, and you can make a discernment.

First, the electrochemical method of direct reading of the instrument, can achieve real-time reading, but many of the low-end sensors used are affected by the environment and are easy to fail or be affected by decoration and other odors (non-formaldehyde) interference is not accurate (to say that there is still a lot of room for progress in domestic sensors), so that the detection results and the actual deviation is large, dozens of hundreds of such instrument sensors are not formaldehyde sensors at all, known as "air anemometer", this kind of instrument does not have tens of thousands of dollars of don't want to measure indoor formaldehyde, No matter how much indoor formaldehyde exceeds the standard, it is relatively small, and the sensitivity of this type of detector is particularly high; In addition, if you still want to use this instrument to measure TVOC and benzene, it is redundant and has little reference value, both of which must be measured accurately by large laboratory instruments, and the detection process is particularly complicated, which is why these two types of pollutants are tested by professional institutions for high fees;

The second is the formaldehyde kit, the detection principle is based on the national standard method phenol reagent chromogenic method, and the detection is relatively reliable in the first category (except for those in tens of thousands may be better), but the national standard law stipulates that 10 liters of air need to be collected quantitatively using a sampler, and the self-test box only stipulates: stand for 30 minutes.

How much of the volume of air reacts with the absorbent in these 30 minutes? This point is unpredictable, it may be that the indoor air circulation velocity is high and absorbs more, and the Brownian motion absorbs more quickly, on the contrary, the detection is not scientific, the randomness is too high, and it is best not to use it;

The third is a new generation: convenient pump-suction air formaldehyde detector, why is it convenient, because the professional testing company also uses the pump-suction type, compared with the traditional structure is more complex and professional, ordinary consumers will not operate, and the convenient pump-suction type on the market, optimized structure, easy to operate, although the process is the same, but it is indeed a lot simpler, completely according to the national standard detection method, the configuration of the pump-type sampler, users can collect a fixed volume of 10 liters of air by themselves, and then according to the national standard method phenol reagent chromogenic method detection, It makes up for the shortcomings of the formaldehyde kit.

1. The difference between the pertinence of GB T18883 standard is a healthy standard for the living environment, and it is not binding on builders, decorators and furniture manufacturers, and the GB50325 standard is the acceptance standard for construction and decoration, which is mandatory for builders and decorators.

2. The difference between index values The GB T18883 standard involves a total of 19 indicators of physical, chemical, biological and radioactive properties of the indoor environment, and the GB50325 specification only limits 5 items such as formaldehyde, benzene, ammonia, TVOC (total volatile organic compounds) and radon 222. The limit values for the overlapping items of the two standards are 200 400 at a time in the order of formaldehyde, benzene, ammonia, TVOC (total volatile organic compounds) and radon-222.

Formaldehyde is something that everyone is more afraid of, because the incubation time is extremely long, and it is very harmful to the human body, so when decorating, it is necessary to choose building materials with normal formaldehyde indicators, and before moving in, conduct a professional formaldehyde test. So, how normal is the formaldehyde detection value? How to effectively avoid the harm of formaldehyde when moving into a new house?

Let's take a brief look at it together.

1. How normal is the formaldehyde detection value?

1. The indoor formaldehyde content should be less than milligrams, and cubic meters are considered normal; 2. The formaldehyde content of 100 grams of Class A parquet should be less than 9 mg per mountain, which is considered a normal teasing shed; 3. The formaldehyde content of every 100 grams of Class B solid wood in line with the floor should be greater than 9 mg and less than 40 mg. 4. The formaldehyde content of wood-based panels should be less than milligrams of cubic meters. 5. The formaldehyde content of the wooden floor should be less than milligrams of cubic meters.

Second, how to effectively avoid the harm of formaldehyde when moving into a new house.

1. Before moving into the new house, it should be through at least 3 months of normal ventilation, but because the incubation period of formaldehyde is very long, so after moving in, it is necessary to ventilate for a few hours every day.

2. When moving in, buy more green plants, and then place them in areas that are often active, such as living rooms, bedrooms, etc., which can not only play a role in purifying the air, but also have excellent decorative effects, killing two birds with one stone.

3. In the newly installed or newly purchased cabinet, place the activated carbon bag, which can effectively adsorb the formaldehyde emitted by the cabinet and avoid the owner from being harmed by formaldehyde, but the adsorption capacity of activated carbon is limited, so it needs to be replaced regularly.

4. Many inexperienced owners think that they can move in after ventilation, but in fact, the release cycle of formaldehyde is very slow, in order to ensure the safety of the owners, before moving in, it is best to test to confirm that the formaldehyde content is within the normal index, and then move in.

Summary: The above about how much formaldehyde detection value is normal, and how to effectively avoid the harm of formaldehyde when moving into a new house, I hope it will help you. If you want to know more about related information, please pay attention to Qeeka Home.

Abstract The indoor standard value of formaldehyde is not more than milligrams per cubic meter, if the concentration of formaldehyde has exceeded milligrams, or even reached milligrams, it is considered that formaldehyde is slightly increased, that is, the meaning of mild exceedance.

What is the indoor formaldehyde detection index value?

The indoor standard value of formaldehyde is not more than milligrams per cubic meter, if the concentration of formaldehyde has exceeded milligrams, or even reached milligrams, it is considered that formaldehyde is slightly increased, that is, the meaning of mild exceedance.

Is this normal?

Why doesn't it show up?

It does not show whether it is due to the instrument or the absence of formaldehyde.

Is the following set of data normal?

I guess it's broken.

Below is the temperature.

At the top is formaldehyde.

You can take a look at the product manual.

That means there is no formaldehyde.

One is temperature and the other is humidity.

Then this one shows no.

Formaldehyde is shown on the outside.

If you are not sure, you can test it several times.

Do you have any other questions?

<> is normal, indoor formaldehyde concentrations are within the normal range, which is the standard range stipulated by the state. However, formaldehyde will be released into the air at any time indoors, and if the detected formaldehyde concentration is too close, the risk of exceeding the standard will be greatly increased, so under normal circumstances, the indoor formaldehyde concentration should be maintained within the real normal. If it is exceeded, it is recommended that we must reduce the indoor formaldehyde concentration in a timely manner through various reasonable ways, otherwise once it exceeds the standard, it is likely to seriously endanger our health.

Formaldehyde is a toxic substance that seriously harms the human body. Especially after the decoration, a large amount of formaldehyde will be generated, be sure to do a good job of removing formaldehyde, and then measure before moving in! So how much is indoor formaldehyde qualified?

What are the measurement methods? Generally, according to the national health standards, the maximum allowable concentration of formaldehyde in indoor air is milligrams of cubic meters. When testing, you can use the odor detection method or the formaldehyde test box to test the concentration of formaldehyde, as well as the specific concentration!

Formaldehyde is generally produced in the decoration process, especially after the decoration, there will always be a large number of harmful substances such as formaldehyde indoors, so at this time must not be moved, it is best to measure first, to see the concentration of formaldehyde, so that certain means can be taken to remove formaldehyde. So how much is indoor formaldehyde qualified? Generally, according to the national health standards, the maximum allowable concentration of formaldehyde in indoor air is milligrams of cubic meters.

In fact, just after the decoration, there will be formaldehyde exceeding the standard, and the test can be carried out at this time. The easiest way is to smell the smell, if your new house has a big decoration smell, or even a little pungent, then the formaldehyde in this kind of house is exceeded! This kind of house is not able to live in the Yin Chang world, it is easy to get sick, be sure to open the window in time to ventilate!

Formaldehyde test box is the most economical and relatively standard and professional test method. And it is relatively small, and the test is very simple, first seal the test house for one hour, then pour the test agent into the test box, cover the lid and shake evenly. Then open the lid, put the formaldehyde test box, and leave it indoors for half an hour.

Half an hour later, put the test strip into the test box, and the contrast color card can test the formaldehyde content in the room!

How much indoor formaldehyde is qualified, I believe you already have an understanding. The harm of formaldehyde is very great, so everyone must measure the formaldehyde concentration, if it does not meet the living standards, be sure to remove formaldehyde before moving in!

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