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Large Emissions of Low-Volatility Siloxanes during Residential Oven Use
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2021-06-28 , DOI: 10.1021/acs.estlett.1c00433 Erin F. Katz 1, 2 , David M. Lunderberg 1, 2 , Wyatt L. Brown 3 , Douglas A. Day 3 , Jose L. Jimenez 3 , William W. Nazaroff 4 , Allen H. Goldstein 2, 4 , Peter F. DeCarlo 5
Environmental Science & Technology Letters ( IF 8.9 ) Pub Date : 2021-06-28 , DOI: 10.1021/acs.estlett.1c00433 Erin F. Katz 1, 2 , David M. Lunderberg 1, 2 , Wyatt L. Brown 3 , Douglas A. Day 3 , Jose L. Jimenez 3 , William W. Nazaroff 4 , Allen H. Goldstein 2, 4 , Peter F. DeCarlo 5
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Cooking is a source of airborne particles indoors and outdoors. A field study at a residential test house (HOMEChem) included two Thanksgiving-style cooking experiments involving prolonged use of an oven with a light use history. Large enhancements of airborne low-volatility siloxanes were observed by three in situ particle-phase instruments: a high-resolution aerosol mass spectrometer, a semivolatile thermal desorption aerosol gas chromatograph, and an extractive electrospray ionization mass spectrometer. The combination of these instruments permits the quantitative analysis of time-dependent processes and fates over a wide volatility range with high chemical specificity. Cumulatively, 17 and 8.5 mg of bulk siloxane material were emitted indoors and observed in airborne particles during the first and second Thanksgiving experiments, respectively; a peak 5 min average siloxane concentration of 58 μg/m3 was measured. Cyclic siloxanes D10–D18 were quantified, and D17 and D16 were the most abundant. We infer that heating of silicone materials inside the oven caused volatilization of cyclic siloxanes and cooler temperatures away from the oven resulted in condensation. Low-volatility siloxanes comprised a surprisingly large fraction of the total emitted submicrometer particle mass: 18% and 9% during the first and second Thanksgiving experiments, respectively. We estimate ∼75% of the low-volatility siloxane mass was ventilated outdoors.
中文翻译：
住宅烤箱使用期间低挥发性硅氧烷的大量排放
烹饪是室内和室外空气中颗粒的来源。在住宅测试室 (HOMEChem) 进行的一项实地研究包括两个感恩节式烹饪实验，涉及长时间使用使用时间较少的烤箱。通过三种原位粒子相仪器观察到空气中低挥发性硅氧烷的大幅增强：高分辨率气溶胶质谱仪、半挥发性热解吸气溶胶气相色谱仪和萃取电喷雾电离质谱仪。这些仪器的组合允许对具有高化学特异性的宽挥发性范围内的时间相关过程和命运进行定量分析。在第一次和第二次感恩节实验中，分别在室内和空气中的颗粒中分别累积了 17 和 8.5 毫克的散装硅氧烷物质；3被测量。环状硅氧烷 D10-D18 被定量，D17 和 D16 含量最高。我们推断烘箱内有机硅材料的加热导致环状硅氧烷挥发，而远离烘箱的较冷温度导致冷凝。在第一次和第二次感恩节实验中，低挥发性硅氧烷占总发射亚微米颗粒质量的比例惊人地大：分别为 18% 和 9%。我们估计约 75% 的低挥发性硅氧烷物质在室外通风。
更新日期：2021-07-13
中文翻译：
住宅烤箱使用期间低挥发性硅氧烷的大量排放
烹饪是室内和室外空气中颗粒的来源。在住宅测试室 (HOMEChem) 进行的一项实地研究包括两个感恩节式烹饪实验，涉及长时间使用使用时间较少的烤箱。通过三种原位粒子相仪器观察到空气中低挥发性硅氧烷的大幅增强：高分辨率气溶胶质谱仪、半挥发性热解吸气溶胶气相色谱仪和萃取电喷雾电离质谱仪。这些仪器的组合允许对具有高化学特异性的宽挥发性范围内的时间相关过程和命运进行定量分析。在第一次和第二次感恩节实验中，分别在室内和空气中的颗粒中分别累积了 17 和 8.5 毫克的散装硅氧烷物质；3被测量。环状硅氧烷 D10-D18 被定量，D17 和 D16 含量最高。我们推断烘箱内有机硅材料的加热导致环状硅氧烷挥发，而远离烘箱的较冷温度导致冷凝。在第一次和第二次感恩节实验中，低挥发性硅氧烷占总发射亚微米颗粒质量的比例惊人地大：分别为 18% 和 9%。我们估计约 75% 的低挥发性硅氧烷物质在室外通风。
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