Fraunhofer WKI, Department of Material Analysis and Indoor Chemistry, Braunschweig, Germany.
Environ Pollut. 2012 Oct;169:167-74. doi: 10.1016/j.envpol.2012.01.028. Epub 2012 Feb 24.
In recent years the pollution of indoor air with ultrafine particles has been an object of intensive research. Several studies have concurred in demonstrating that outdoor air makes only a limited contribution to polluting indoor air with ultrafine particles, provided significant sources in the immediate neighborhood are absent. Nowadays, electrical devices operated in homes and offices are identified as particle emission sources. A comparison of the emission rates can be made by calculating the total number of particles released with respect to the operating time. The identified particles are condensed semi-volatile organic compounds with a low percentage of non-volatile inorganic components. To characterize the indoor exposure to airborne particles, an algorithm has been developed which permits a realistic calculation of the particle intake and deposition in the human respiratory tract from measured size and time resolved particle number concentrations following the model of the International Commission on Radiological Protection.
近年来，室内空气中超细颗粒的污染一直是研究的重点。多项研究一致表明，只要附近没有明显的污染源，室外空气对室内超细颗粒污染的贡献是有限的。如今，家庭和办公室中使用的电器被认为是颗粒排放源。通过计算运行时间内释放的颗粒总数，可以比较排放率。所识别的颗粒是冷凝的半挥发性有机化合物，其非挥发性无机成分的比例较低。为了描述室内空气中颗粒的暴露情况，开发了一种算法，该算法可以根据国际辐射防护委员会的模型，根据测量的粒径和时间分辨的颗粒数浓度，对从空气中吸入和沉积在人体呼吸道中的颗粒进行实际计算。
