Citizens claim that there is strange smell that is continued in the city: Professional personnel take the instrument to look for the strange smell

Citizens claim that there is strange smell that is continued in the city: Professional personnel take the instrument to look for the strange smell

Engineer Gao LangHua (right) , it take gas measuring apparatus separately at Zhang Ting it is portable in " The strange smell " The highway section appearing measures air quality Staff reporter Dong GuoLiang Take the photograph
A pungent strange smell flees hither and thither in the city, let a lot of citizens feel panic to the ambient air safely. Yesterday, the modern staff members of chemical research institute of Xi'an, looked for the strange smell in the town taking the professional detecting instrument.
The professional instrument is more sensitive than dog's nose
At 4 o'clock afternoon of yesterday, two large black boxes appeared in midsection on the road of Kunming of Xi'an, attract many citizens' interest, the scientific names of these two instruments call the measuring apparatus of portable gas, " smelling taste" Have, is much more sensitive than dog's nose. After seeing the report about strange smell of this newspaper recently, Xi'an modern instrument and chemistry of chemical research institute quantify professional senior engineer Hu Lan, bring colleague Zhang Ting and high bright China, have this Hi-Tech " weapon " Come to the street.
Hu Lan says, equipped with four small black boxes in the box, it is an instrument which is produced in U.S.A.. In built-in electrochemical sensor its, contain electrochemical liquid, meet little member or organic to volatilize member inorganic in the air, produce the chemical reaction immediately, and on the screen of the instrument, demonstrate the content or density of the gas in the air. " if exceed standard, the warning light will be flickered and cried! "
The carbon dioxide of cigarette increases rapidly to tell truth
In midsection on the road of Kunming, reveal the carbon dioxide content 460ppm (per liter of air includes 460 and promotes the carbon dioxide a little) on the instrument ,And VOC (the organic total amount which volatilizes the gas) Content 0.43ppm, both values are in the normal range.
Lan Hu let the intersection of citizen and Mr. Zheng that smoke, facing toward low mouth by the instrument, spit one cigarette, the value of the carbon dioxide will rise to 750ppm at once, VOC will rise to 2.75ppm. "May for a moment little breeze, will influence the content of different gas in the air, but the floating value is within a certain limit. " Gao LangHua says.
But according to instrument, in this area, gas such as sulfur dioxide, ammonia, hydrogen sulfide have not been detected.
It helps the gas to volatilize that it is fine
Unless subsequently, unless it celebrate abundantly without being come by way and last way cross they, say a lot of citizen,let's rain at cloudy day and night at, taste just begins to become heavy.
Zhang Ting says, rainy day and atmospheric pressure of cloudy air are low, it causes influence to flow to the gas, make some gas difficult to volatilize; Some gas is soluble in water at the same time, meet the small drop in air, assembling forms the bad strange smell. Staff reporter King should Mexico Intern Yang MengWith the enhancement of health consciousness, people pay more and more attention to with the life closely bound up health problem, such as the food security, medical treatment is ensured, medical information,etc., healthy life should be from understanding information begins!More excellent health information please enter:News channel
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