Does the cell phone shell release carcinogenic substances "benzene"? Expert: it does

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-Reporter Ningtian He Li Astronomical Chart

Core Tips | is the cell phone case really releasing carcinogenic benzene? In the execution of the elevator and the subway call, radiation will be more than usual times, this is true? According to these network rumors, the River newspaper "Life Experiment" column. Jointly with CCTV financial channel Interactive Truth-seeking program "is true?" For you one by one authentication and answer.

"Experiment One"

The phone case is really going to release

Carcinogenic substance "benzene"?

Myth: Recently, the online Vibe mobile phone shell will release carcinogenic substances "benzene", this is true?

To this end, the "is true" column in the mobile vendors and shopping malls each purchase of plastic, silica gel and leather three common materials of six mobile phone shells to the Tsinghua University building Environmental Testing Center for the experiment. Because the cell phone shell normal use temperature is about 45 ℃, when the experiment cabin temperature heating to 45 ℃, put in the mobile phone shell.

After one hours, six cell phone shells are heated and released after the gas collection is complete.

The experimenters then analyzed the benzene content of these gases. After five days, the instrument was analyzed and compared. The group found that both the mobile vendors bought the brand-name mobile phone shell, or in the shopping malls to buy branded mobile phone shell has released benzene. The amount of release is between 0.0191MG/M3 to 0.0494MG/M3.

Because China does not target the mobile phone shell national standards, only good choice of the national standard for indoor air quality as a reference. "National air quality standards for benzene concentration limits are 0.011mg/m3, judging from test results," said Xu Qiujian, Ph. D., Department of Architectural Technology Science, Tsinghua University. The concentration range of benzene is between 0.01mg/m3 and 0.05mg/m3, and the result shows that the amount of benzene released is not as a whole.

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Experimental conclusion: The cell phone shell does release benzene, but the amount of release is not as scary as it is rumored to be.

noun explanation

Benzene: is a colorless transparent aromatic fragrance, volatile toxic liquid. It can evaporate at room temperature. Form benzene vapor. The higher the temperature, the greater the volatility, the World Health Organization under the International Agency for Cancer research as a kind of human carcinogens.

"Experiment Two"

Does the cell phone shell emit pungent odor is formaldehyde?

Myth: Some of the phone shells purchased on the market do emit a strong pungent odor. A netizen said. It may be the release of formaldehyde. Is this true again?

Column group again to test the mobile phone shell, and the temperature of 45 ℃ heating for one hours, followed by the collection of air samples in the experimental module. The inspectors said. The experiment will use a reagent that assumes that the air sample contains formaldehyde. The reagent will turn blue.

After 15 minutes, the reagent does turn blue. And got six mobile phone shell formaldehyde release. Dr. Xu Qiujian said. The National air quality standard for formaldehyde concentration limit is 0.1mg/m3.

The results of this experiment show. The section group purchased two silicone phone case samples and two leather-made mobile phone case samples. Formaldehyde emissions are higher than the indoor air quality standards stipulated in the 0.1MG/M3.

Experimental conclusion: In order to detect the cell phone shell will release formaldehyde. "Using this product, we are not sure that the formaldehyde concentration in the air will exceed the standard, but we can add the risk of inhaling many other formaldehyde," Dr. Xu Qiujian said. Dr Xu told reporters that the formaldehyde may come from the use of adhesives on mobile phone shells. It is also possible that the material used in the silicone shell is not stable enough to emit.

Expert reminders

When buying a mobile phone shell, try to choose products without obvious odor. And in the case of ventilation, the same time should also reduce the child's opponent chassis contact.

"Experiment Three"

Will the phone lead to thunder and hurt people?

Saying: Recently, a mobile phone to the lightning hurt people's news quickly became the topic of hot discussion. The River newspaper reporters on the internet search, found that the suspected mobile phone led Thunder incident unexpectedly early occurred.

According to media reports, July 5 this year, Pingdingshan Ye County A 18-year-old boy to answer the phone. Lead to death from lightning strikes.

To find the truth. CCTV "is true" column group reporter, came to China Electric Academy high-voltage outdoor experimental field simulation lightning strikes experiment, according to the experimental plan. The three mannequins were evenly placed outdoors, in which one of the fake hands had a connected cell phone, and the other two models did not carry any metal items.

The first time in the second experiment. Lightning didn't hit three dummies. In the third experiment, lightning struck a dummy who wore a plaid shirt. But the dummy didn't take his cell phone.

In a total of 20 lightning strikes in the same day, 11 were hit on the ground, the other 8 were hit two without a cell phone dummy, and the fake man holding a cell phone was only a shock!

Experimental conclusion: Mobile phone is not the culprit of lightning.

"Lightning tends to choose objects that make the space electric field more distorted. Because of the relatively small size of the mobile phone, the resulting spatial electric field distortion is not enough to make the high-voltage discharge channel hit the phone.

Zhang Yijun, a researcher at the Project Laboratory for Lightning Physics and protection at China Meteorological Academy, explains.

Expert reminders

The randomness of lightning is relatively large. is an uncontrolled phenomenon, so it is recommended that everyone in the thunderstorm weather. Try not to stand near trees, tall buildings, and high-voltage antennas.

"Experiment Four"

To make a phone call in the elevator and the subway.

Will the radiation be higher than usual?

Myth: The rumor originated in a news report. It is best not to call the phone in the subway or in the elevator, the report said. This will not only cause noise, but the parties are exposed to electromagnetic radiation 6 to 15 times times higher than usual.

The message first. Very quickly spread on the internet.

For verification. "Is it true?" column group dedicated to the Ministry of Posts and Telecommunications and "Dahl asked" the nature of the society's two lab participants to test and use 2G and 3G phone each one, to test.

First, the experimenter tested the electromagnetic radiation in the outdoor environment to dial two phones.

Then. The experimenters came to the Beijing metro line Line 10, where they were tested. 2G and 3G mobile phones in the Metro when dialed, than in the outdoor dial when measured power density is much higher. Finally, the experimenter test on the elevator on the mobile phone, the test, 2G mobile phones and 3G mobile phones in the elevator when the electromagnetic radiation in the call when the outdoor calls are about 4 times times and 126 times times!

Experimental conclusion: In the subway and elevator calls, mobile phone radiation is really much higher than the outdoors.

Expert reminders

Electrical magnetic field and microwave technology in the posts and telecommunications of the Doctor Peak reminds consumers: "Regular channels of mobile phones in the network before going through the country's network test, will not affect the health of the body."

Assuming that the use of a cottage machine, there is no network test may exist a certain critical. ”

Does the cell phone shell release carcinogenic substances "benzene"? Expert: it does