Max Planck-Institute for Chemistry, Mainz, Germany.
Indoor Air. 2018 Jan;28(1):164-172. doi: 10.1111/ina.12405. Epub 2017 Aug 18.
Human beings emit many volatile organic compounds (VOCs) of both endogenous (internally produced) and exogenous (external source) origin. Here we present real-world emission rates of volatile organic compounds from cinema audiences (50-230 people) as a function of time in multiple screenings of three films. The cinema location and film selection allowed high-frequency measurement of human-emitted VOCs within a room flushed at a known rate so that emissions rates could be calculated for both adults and children. Gas-phase emission rates are analyzed as a function of time of day, variability during the film, and age of viewer. The average emission rates of CO , acetone, and isoprene were lower (by a factor of ~1.2-1.4) for children under twelve compared to adults while for acetaldehyde emission rates were equivalent. Molecules influenced by exogenous sources such as decamethylcyclopentasiloxanes and methanol tended to decrease over the course of day and then rise for late evening screenings. These results represent average emission rates of people under real-world conditions and can be used in indoor air quality assessments and building design. Averaging over a large number of people generates emission rates that are less susceptible to individual behaviors.
人类会排放许多内源性（体内产生）和外源性（外部来源）的挥发性有机化合物（VOCs）。在这里，我们展示了电影院观众（50-230 人）在三次电影放映过程中随时间变化的挥发性有机化合物的实际排放率。电影院的位置和电影选择允许在一个以已知速度换气的房间内高频测量人体排放的 VOCs，从而可以计算出成人和儿童的排放率。我们分析了气相排放率随一天中的时间、电影期间的变化以及观众年龄的变化。与成年人相比，12 岁以下的儿童的 CO、丙酮和异戊二烯的平均排放率较低（低 1.2-1.4 倍），而乙醛的排放率则相当。受外源物质影响的分子，如十甲基环五硅氧烷和甲醇，在一天的过程中趋于下降，然后在深夜放映时上升。这些结果代表了实际条件下人群的平均排放率，可用于室内空气质量评估和建筑设计。对大量人群进行平均处理可以降低个体行为对排放率的影响。
