Dust and particulate matter
Indoor dust and Research
The Aurolex Monitoring System can be used to continuously measure the emission of dust and particulate matter.
In accordance with the Dutch Emission Directive, a distinction is made between coarse and fine dust, coarse being solid particulate matter that can not be inhaled. Coarse particles (particles of 10-100 uM) can be caught in the nose and throat, and partly swallowed. Coarse dust may cause inconvenience and/or eye irritation. Finer particles, 0.01-10 uM penetrate the airways and may have an adverse effect on lung function.
In addition to the general physical effects on the respiratory tract, a substance may bring about specific reaction that is dependent on its chemical composition. Locally, acute effects such as irritation or an allergic reaction, and chronic effects such as cancer can occur. In the airways and lungs If the agents are absorbed into the body, these effects can also occur in the lungs. Absorbed agents can have a detrimental effect elsewhere in the body as well.
Particulate matter has never demonstrated a threshold. In accordance with the definition of the Maximum Permissible Risk (MPR) for non-carcinogens, no health-based guideline value can then be calculated. European limit values for particulate matter in the air are an annual average of 40 g / m³ and a daily average standard of 50 g / m³ (35 exceedances). Even at concentrations below those standards are expected health effects (Buringh et al, 2001). Among the population The value in the indoor environment is generally about 60-80% of those in the outdoor environment.
A fine dust meter / particle counter works on the principle of 'light scattering'. The air is passed through a measuring chamber with a fan. A laser beam then illuminates the dust. The light that comes into contact with a particle is absorbed or scattered in specific directions. The direction of scattering is characteristic for the size of the particle, causing the particle counter in a position to determine. The number of particles of a specific size,Indoor dust and Research
With the Aurolex monitoring system, the emission of a particulate substance can be continuously determined by means of measurements