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Human breath as a source of VOCs in the built environment, Part II: Concentration levels, emission rates and factor analysis

机译:人为建筑环境中挥发性有机化合物来源的呼吸,第二部分:浓度水平,排放率和因子分析

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This study aimed to understand the volatile organic compound (VOC) emission levels and possible influencing factors in human exhaled breath via quantitative analysis. Using the experimental method developed previously, breath samples of 117 healthy human subjects were collected and analyzed. Concentration levels of 60 VOCs with the highest detection rates (DRs) were analyzed, and statistical results of emission rates of these VOCs are provided in a table for easy reference. In general, endogenous VOCs were found to have higher concentrations than exogenous VOCs. Furthermore, concentrations and emission rates of these VOCs were statistically compared for gender, different age groups, and smoking exposure types. The results of the univariate analysis showed that these three factors may yield a significant difference in concentration and emission of some, but not all, VOCs. The regression model showed that, for most VOCs, active/passive smoking and being male or of older age were most likely associated with higher emission levels. Age was emphasized to be a significant factor influencing VOC emissions through exhaled air in this study. (C) 2017 Elsevier Ltd. All rights reserved.
机译:这项研究旨在通过定量分析了解人类呼出气中的挥发性有机化合物(VOC)排放水平和可能的影响因素。使用先前开发的实验方法,收集并分析了117名健康人的呼吸样本。分析了具有最高检出率(DR)的60种VOC的浓度水平,并在表格中提供了这些VOC排放率的统计结果,以方便参考。通常,发现内源性VOC的浓度高于外源性VOC。此外,对这些挥发性有机化合物的浓度和排放率进行了统计比较,包括性别,不同年龄组和吸烟暴露类型。单变量分析的结果表明,这三个因素可能会导致某些(但不是全部)VOC的浓度和排放产生显着差异。回归模型表明,对于大多数挥发性有机化合物,主动/被动吸烟以及男性或年龄较大的人最有可能与较高的排放水平相关。在这项研究中,年龄被认为是影响通过呼出空气排放VOC的重要因素。 (C)2017 Elsevier Ltd.保留所有权利。

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