PDF(Pubmed)
Abstract：
Because humans spend about one-third of their time asleep in their bedrooms and are themselves emission sources of volatile organic compounds (VOCs), it is important to specifically characterize the composition of the bedroom air that they experience during sleep. This work uses real-time indoor and outdoor measurements of volatile organic compounds (VOCs) to examine concentration enhancements in bedroom air during sleep and to calculate VOC emission rates associated with sleeping occupants. Gaseous VOCs were measured with proton-transfer reaction time-of-flight mass spectrometry during a multiweek residential monitoring campaign under normal occupancy conditions. Results indicate high emissions of nearly 100 VOCs and other species in the bedroom during sleeping periods as compared to the levels in other rooms of the same residence. Air change rates for the bedroom and, correspondingly, emission rates of sleeping-associated VOCs were determined for two bounding conditions: (1) air exchange between the bedroom and outdoors only and (2) air exchange between the bedroom and other indoor spaces only (as represented by measurements in the kitchen). VOCs from skin oil oxidation and personal care products were present, revealing that many emission pathways can be important occupant-associated emission factors affecting bedroom air composition in addition to direct emissions from building materials and furnishings.
摘要：
因为人类大约有三分之一的时间在卧室里睡觉，而人类本身就是挥发性有机化合物(VOC)的排放源，重要的是要具体描述他们在睡眠中经历的卧室空气的组成。这项工作使用挥发性有机化合物（VOC）的实时室内和室外测量来检查睡眠期间卧室空气中的浓度增强，并计算与睡眠居住者相关的VOC排放率。在正常占用条件下，在数周的住宅监测活动中，使用质子转移反应飞行时间质谱测量了气态VOC。结果表明，与同一住所的其他房间相比，睡觉期卧室中将近100种VOC和其他物种的排放量很高。卧室的空气变化率，相应地,在两个边界条件下确定了与睡眠相关的VOC的排放率：（1）仅在卧室和室外之间进行空气交换，（2）仅在卧室和其他室内空间之间进行空气交换（由厨房中的测量值表示）。存在来自皮肤油脂氧化和个人护理产品的挥发性有机化合物，揭示了许多排放途径可以是重要的居住者相关的排放因素影响卧室的空气成分，除了直接排放从建筑材料和家具。
