Research of the Indoor Air Quality of New Decoration Residence in Tianjin
With the level of life raised in China, the indoor air quality has aroused people's concern. In order to learn the actuality of air pollution in new decoration residence and improve indoor air quality and provide the foundation that constructs countermeasure of controlling indoor air pollution, the field measurements about indoor air pollution of new decoration residence are made in Tianjin. Basing on type of residences, hours of decoration, distinct development business and decoration corporations selected, the status of indoor air contaminants are analyzed, and the major factors effecting on indoor tiny contaminants concentration are researched. Indoor air contaminants mainly come from the residential decoration and building material and various furnishings and the major contaminants is formaldehyde. Temperature and humidity have great effect on tiny contaminants concentration and the sorts of contaminant¿and influencing degree on human of different tiny contaminants are different. The emitting velocity of contaminants in the same material is alterative under the condition of temperature and humidity being changed. The time of residential decoration is also one important element of contaminants concentration. There are many factors influencing the indoor air quality of new decoration residence. To improve the indoor air quality, we can open the windows to make the fresh outdoor air into room. But if the outdoor air is not clean enough, we should place air purification equipment in room.
Design and prototype implementation of indoor air quality monitoring using LonWorks technology
Environmental Protection Agency (EPA) shows indoor air is 2-3 times more polluted than the worst outside air. These pollutants also lead to simple asphyxiation as general health hazard which ensures the importance of indoor air quality (IAQ) monitoring. Therefore maintaining a good indoor air quality improves the health zone of the peoples both in urban and rural areas. Peoples in rural areas are more affected because burning woods and papers are common practices occurring since there is no much awareness about indoor pollution. Studying about indoor air pollutants is important in order to know about the health hazards caused, exposure limits and sources of the pollutants in the living place which makes a right path way to know about the presence and absence of particular pollutant. The proposed system comprises of low cost sintered metal oxide gas sensor which are general air contaminant sensors. These sensors can sense gas concentrations in ppm level which makes it suitable for the indoor air quality monitoring. Testing of the sensors is been carried out in microcontroller to study their real time characteristics. Later sensors are connected to the LonWorks module. LonWorks technology is a cost effective protocol for building automation system. This communication protocol ensures reliable and energy efficient solution to building automation system.
Multisorbent thermal desorption/gas chromatography/mass selective detection method for the determination of target volatile organic compounds in indoor air
A thermal desorption/gas chromatography mass selective detection method using Tenax and Carbotrap multisorbent cartridges for the determination of 28 target volatile organic compounds (VOCs) is described. Techniques used for method validation include determination of limit of detection, limit of quantitation, repeatability, room temperature storage stability, brekhrough volume, and sampler collection efficiency. In addition, 3-ethenylpyridine (3-EP), a pyrolysis product of nicotine, is investigated as a suitable marker for environmental tobacco smoke (ETS)