Description
Analysis of indoor air for phenol and other volatile organic compounds
Indoor air: quantitative determination of 32 compounds, qualitative analysis and identification of pollution sources
Volatile organic compounds (VOCs) - a whole group of various organic substances, including hydrocarbons, aldehydes, alcohols, ketones, terpenoids and other organic compounds.
SOURCES OF VOC IN THE AIR OF PREMISES
Since VOCs are a variety of organic substances, anything, furniture, building and finishing materials, perfumes and cosmetics, detergents and other household chemicals, toys, clothes, shoes, tobacco smoke and cooking can be the source of their entry into the indoor air.
Volatile organic compounds can enter the room and from the air from the street, where there are also many sources of VOCs - transportation and industry, grass and trees.
NORMATIVE CONTENT OF VOCS IN AIR AIR OF PREMISES AND IN ATMOSPHERIC AIR
One of the most widely known representatives of the class of volatile organic compounds is phenol, which is widely used in the manufacture of polymeric materials, artificial fibers, in oil refining and other industries.
Phenol is poisonous and belongs to the second class of danger. Maximum allowable concentration in atmospheric air - 0.01 mg / m3, in the working area - 1 mg / m3. In the air of the premises can come from furniture and polymeric materials. There are cases when, for example, children's toys became a source of phenol in the air of an apartment.
A less well-known, but no less dangerous representative of VOC is styrene, a substance of hazard class III, which has a general toxic and carcinogenic effect. The MPC of styrene in the air of the premises and in the atmosphere is 0.04 mg / m3, the air of the production premises is 30 mg / m3. The source of styrene can serve items from poor-quality ABS plastic, including household appliances, noise and heat insulation materials.
Not all volatile organic compounds are as dangerous as phenol and styrene. Among them are completely harmless substances for which maximum permissible concentrations in the air are not established. A large class of volatile organic compounds - terpenoids. These include, for example, α-pinene and bornyl acetate - it is thanks to these substances that it is so pleasant to be in the pine or fir forest.
AIR TEST SELECTION FOR LOS ANALYSIS
The sampling of indoor air for analysis of volatile organic compounds is carried out using an aspirator or a special pump that pumps air from the room through sorption tubes filled with a special sorbent capable of trapping molecules of organic compounds.
AIR IN THE PREMISES: QUANTITATIVE MEASUREMENT OF VOC CONCENTRATIONS
Upon admission to the laboratory, sorption tubes with samples are recorded and transferred for analysis.
In the course of analysis using a thermal desorber, volatile organic substances are desorbed, separated in a chromatograph and recorded with a mass detector. The substance is identified by its mass spectrum, and the concentrations are determined using a pre-constructed calibration curve.
The list of indicators determined by the quantitative analysis of indoor air
1,2,4,5-tetramethylbenzene
1,2,4-trimethylbenzene
1,4-diisopropylbenzene
naphthalene
styrene
the dean
dodecane
nonan
octane
undecane
hexadecane
cyclohexane
α-pinene
3-caren
camphene
1-octanol
2-propanol
1,2-dichloroethane
butyl acetate
ethyl acetate
butanol-2
benzaldehyde
hexane
cyclohexanone
ethylbenzene
methylbenzene (toluene)
phenol
benzene
cresol (m-, p-, o-)
xylene (m-, p-, o-)
dimethyl phthalate
LOS amount
AIR IN PREMISES: A QUALITY ANALYSIS
A qualitative analysis of the air in an apartment, office or workplace can be carried out in conjunction with measuring the concentrations of some VOCs or by itself.
Qualitative analysis allows with a high degree of reliability to identify up to 2500 different substances present in the air of the room, even in very low concentrations.
In addition, the analysis of the chromatogram obtained allows us to make assumptions about the origin of the detected substances - where such a spectrum of substances can come from, and how to deal with it ...
ANALYSIS OF AIR ON LOS, PRICE, TERMS OF CONDUCT
Coordination of specialist departure dates: from 30 minutes.
Sampling time: 10 to 30 minutes.
Analysis time: 2-3 hours.
The result of the provision of services: an air analysis protocol containing data on actual concentrations of 32 volatile organic compounds, reference information on the maximum permissible concentrations of VOCs, and, when ordering a qualitative analysis, chromatograms with identified substances and transcript.
The general term of the service: 2-3 business days.
