Unexpectedly high concentrations of monoterpenes in a study of UK homes.

Unexpectedly high concentrations of monoterpenes in a study of UK homes.
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在一项针对英国家庭的研究中,单萜浓度出乎意料地高。

DOI:
10.1039/c6em00569a
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发表时间:
2017
期刊:
Environmental science. Processes & impacts
影响因子:
--
通讯作者:
Wang CM
Wang CM
中科院分区:
--
文献类型:
--
作者:
Wang CM

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在家中发现的挥发性有机化合物(VOC)的丰度取决于许多因素,如排放,通风和氧化环境,这些都随着时间的推移而变化,反映了化学品使用,行为和建筑设计/材料的变化。在25个不同年龄,设计和占用的英国家庭中的挥发性有机化合物的浓度进行了量化,使用连续室内空气采样超过五天。通过低流量(1 mL min-1)恒定流量限制器将空气收集到抽空的6 L内部经二氧化硅处理的罐中,直到罐达到大气压。随后进行热解吸-气相色谱和高质量精度飞行时间质谱(TD-GC-TOF/MS)。对发现的8种最丰富的碳氢化合物VOCs进行了全面的定量分析。尽管建筑特征和居住人数不同,但94%的家庭含有D-柠檬烯或α-蒎烯作为最丰富的VOCs。在25个家庭中,室内单萜烯浓度的变化远远大于异戊二烯、苯、甲苯和二甲苯等物质的变化。室内VOCs的变化似乎受到居住者活动的强烈影响,例如清洁,5天平均浓度的D-柠檬烯范围从18 μg m−3到超过1400 μg m−3,这可能是文献中报道的最高国内值。
The abundance of volatile organic compounds (VOCs) found in homes depends on many factors such as emissions, ventilation and the oxidative environment and these are evolving over time, reflecting changes in chemical use, behaviour and building design/materials. The concentrations of VOCs in 25 UK homes of varying ages, design and occupancy were quantified using continuous indoor air sampling over five days. Air was collected through low flow (1 mL min−1) constant flow restrictors into evacuated 6 L internally silica-treated canisters until the canisters reached atmospheric pressure. This was followed by thermal desorption-gas chromatography and high mass accuracy time-of-flight mass spectrometry (TD-GC-TOF/MS). A fully quantitative analysis was performed on the eight most abundant hydrocarbon-based VOCs found. Despite differences in building characteristics and occupant numbers 94% of the homes had D-limonene or α-pinene as the most abundant VOCs. The variability seen across the 25 homes in concentrations of monoterpenes indoors was considerably greater than that of species such as isoprene, benzene, toluene and xylenes. The variance in VOCs indoors appeared to be strongly influenced by occupant activities such as cleaning with 5-day average concentrations of D-limonene ranging from 18 μg m−3 to over 1400 μg m−3, a peak domestic value that is possibly the highest yet reported in the literature.
使用室内测量和调查数据预测安大略省温莎居民对挥发性有机化合物的个人暴露程度
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