Preliminary investigation of aerosol inhalability at very low wind speeds
Preliminary investigation of aerosol inhalability at very low wind speeds
复制标题
极低风速下气溶胶可吸入性的初步研究
DOI：
10.1093/annhyg/41.inhaled_particles_viii.695
复制
发表时间：
1997
影响因子：
--
通讯作者：
R. Donaldson
中科院分区：
文献类型：
--
作者：
A. Maynard;R. Aitken;L. Kenny;P. Baldwin;R. Donaldson
International agreement on the inhalable convention was reached in the early 1990s, with the International Standards Organisation (ISO), the Comite Europeen Normalisation (CEN) and the American Conference of Government Industrial Hygienists (ACGIH) publishing standards based on the same aerosol penetration curve. This penetration curve was primarily based on the measured inhalability of breathing manikins in wind tunnels operated at between 1 and 4ms" 1 (Ogden and Birkett, 1977; Armbruster and Breuer, 1982; Vincent and Mark, 1982). However, evidence is beginning to accumulate indicating that typical average wind speeds in indoor work environments tend to be closer to 0.1-0.2 m s". Recent measurements made by the Health and Safety Laboratory indicate that the wind speed in indoor workplaces is typically less than 0.2 m s~ for the majority of the time, and show good agreement with earlier measurements taken by Berry and Froude (1989). To investigate whether the current inhalable convention is a suitable model for inhalability at these low wind speeds as well as wind speeds above 1 m s", we have devised a method of measuring inhalability in very low wind speeds, and carried out a number of preliminary measurements. Measurement methods were initially developed independently in two laboratories (the Health and Safety Laboratory (HSL) and the Institute of Occupational Medicine (IOM)) to guard against laboratory-dependent results. These were subsequently compared and a standardised approach agreed upon.
